Relevant bibliographies by topics / Concrete water retaining structures

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Concrete water retaining structures'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Concrete water retaining structures.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Concrete water retaining structures"

1

Kruglov, G. G., N. N. Linkevich, and O. V. Nemerovets. "Filtration Bypassing Retaining Hydraulic Structures." Science & Technique 19, no. 3 (June 5, 2020): 252–57. http://dx.doi.org/10.21122/2227-1031-2020-19-3-252-257.

Full text
Abstract:
Concrete dams that are part of river waterworks are integrated with earthworks or with banks using coastal abutments. If the soil of cost or earthen dam is permeable, then in the zone of contiguity water filtration occurs around the coastal abutment. Calculation of filtration bypassing the coastal abutment at specified water levels in the upper and lower pools is performed with the aim of constructing an encircling curve of depression and determining a gradient of filtration flow that controls the filtration strength of the soil beyond the abutment. This problem has no theoretical solutions – in view of its complexity, approximate calculation methods have been developed for individual calculation schemes. For the case when the soil behind the coastal abutment is homogeneous and isotropic, groundwater inflow from the coast is absent or insignificant and can be neglected, and the coastal abutment is located on a water bed and approximate methods by V. P. Nedrigi and R. R. Chugaeva are proposed in the paper. The experience of surveying a number of Belarusian hydropower stations has shown that the absence of a justified prediction pertaining to the position of groundwater levels beyond the estuary leads to a decrease in the strength and stability of the coastal abutment and its possible destruction. An experimental verification of the approximate method for calculation filtration bypassing the coastal abutment developed by R. R. Chugaev has been carried out in laboratory conditions. According to the obtained experience a depression curve encircling the abutment has been constructed which show good agreement between experimental and calculated data that allows to use this method for reasonable design of coastal abutment structures ensuring their reliable operation.
APA, Harvard, Vancouver, ISO, and other styles
2

Gao, Su Yang, Yan Chen, Yao Feng Xie, Wen Dong Lei, and Kai Yin. "Optimization of High Concrete Retaining Wall Structure." Applied Mechanics and Materials 357-360 (August 2013): 597–603. http://dx.doi.org/10.4028/www.scientific.net/amm.357-360.597.

Full text
Abstract:
The height of vertical pier retaining wall is relatively larger in regions with great height of water. As the retaining wall becomes higher, the cross-sectional area of ordinary gravity pier structure becomes larger and foundation strength needs to be larger, thus there are some restrictions for traditional structure form. This research focuses on new structure forms of high concrete retaining wall and its optimization design for piers in regions with great height of water. This study establishes a nonlinear constrained mathematical model of pier high retaining wall structures. The objective function is cross-sectional area of the pier retaining wall which is restricted by the stability, bearing capacity of foundation and strength of cross-section of retaining wall. This model is solved by fmincon function from Matlab and the results present an economically reasonable cross-section form. This new selection is greatly significant to improve the stability of high concrete retaining wall and reduce the project cost. The new structure is successfully used in a port of Huaihe River and it can be a solution to pier structure selection problem in regions with great height of water in the future.
APA, Harvard, Vancouver, ISO, and other styles
3

Mikhasek, Andrey, Maxim Rodionov, Margarita Litvinova, and Rinat Mingafin. "Overflowing phreatic dams built with the use of modern composite materials." MATEC Web of Conferences 196 (2018): 04011. http://dx.doi.org/10.1051/matecconf/201819604011.

Full text
Abstract:
Costs and terms of hydroelectric complexes construction, of low pressure constructions in particular, can be significantly reduced by ensuring the safe passage of flood discharge through the crest of water-retaining structures. When water-retaining structures are made from soils, this condition can only be fulfilled by creating special fastenings of a crest and dam slopes from erosion. There is a large number of technical solutions for overflowing phreatic dams construction with the use of stone, concrete, reinforced concrete and metal. However, most of them have specific disadvantages. They are high materials consumption, labour input and expenses. These disadvantages, in our opinion, can be minimized by applying modern composite materials such as geosynthetic shells, concrete-filled textile floor-floor-mats and coarse-pored concrete. The paper describes structures of overflowing phreatic dams invented by the authors with the use of modern composite materials, as well as the results of model hydraulic studies of overflowing phreatic dams with a downstream slopes formed by geosynthetic shells.
APA, Harvard, Vancouver, ISO, and other styles
4

Qadir, Adnan, and Uneb Gazder. "Flexural and shear strengths of fiber modify lightweight aggregate concrete and its application in water-retaining structures." World Journal of Engineering 14, no. 2 (April 10, 2017): 101–7. http://dx.doi.org/10.1108/wje-12-2016-0174.

Full text
Abstract:
Purpose The purpose of this study is to investigate the incorporation of lightweight aggregate concrete modify with fiber (LWACF) in water retaining structure. In developed countries LWACF is being successfully used as structural concrete; however, third-world countries such as Pakistan are still struggling to come up with the practical applications of lightweight concrete in the building and construction industry. One reason is because of the lack of reliable data regarding its performance as a structural member in the building and construction industry. Design/methodology/approach The present study inspected the flexural and shear tolerance of fiber-reinforced LWACF by testing six beam specimens’ cast, cured and tested after 28 days for the purpose. An overhead tank of 1,000-gallon capacity was also constructed to verify the application of LWACF by observing its water retention behavior. The experimental design included a mix design of concrete at a target strength of 21 MPa for control sample natural aggregate and for synthetic aggregate modified with polypropylene fibers. Compressive strengths of both categories of concrete were also determined by crushing the cylindrical samples at the age of 7, 14, 21 and 28 days. The cast beams were later subjected to the application of two-point loading test until failure. Findings It was found that the beams fabricated with LWACF possessed better resistance to cracks compared with those fabricated with normal weight concrete, both in terms of number and crack width. The study also concluded that the constructed water tank with LWACF was thermally efficient and structurally sound, as it showed no sign of seepage for the observed period. Originality/value On the basis of the results, it can be concluded that the LWACF used has revolutionized the concept of using lightweight aggregates in regular structures and that consequently it will help in a constructing a sustainable environment. One of the useful applications of such material is for water-retaining structures.
APA, Harvard, Vancouver, ISO, and other styles
5

Pontani, Nicola, Kateryna Oliynyk, and Claudio Tamagnini. "Fully-coupled analysis for the behaviour of flexible retaining structures under seismic conditions." E3S Web of Conferences 195 (2020): 01024. http://dx.doi.org/10.1051/e3sconf/202019501024.

Full text
Abstract:
The study concerns the analysis of the behaviour of two propped reinforced-concrete diaphragm walls in coarse sand under seismic conditions. Fully-coupled dynamic equilibrium and pore water flow under unsaturated conditions for the soil have been taken into account, in order to assess the effects that the development of excess pore water pressures can have on the performance of such structures when dynamic conditions occur. The von Wolffersdorff hypoplastic model and the van Genuchten soil-water retention model have been used to describe the mechanical and retention behaviour of the sand. The Finite Element predictions of the soil and retaining structure behaviour show a significant dependence of the seismic performance of the structure – evaluated in terms of permanent displacements and structural loads, in view of the modern performance-based design criteria – on the excess pore pressures developed in the soil during the seismic shaking, even when dynamic liquefaction does not occur.
APA, Harvard, Vancouver, ISO, and other styles
6

Angelucci, Matteo. "Concrete hydration temperatures for the design of crack-width reinforcement in concrete water-retaining structures – design values versus in-situ values." MATEC Web of Conferences 199 (2018): 11014. http://dx.doi.org/10.1051/matecconf/201819911014.

Full text
Abstract:
Cracking in concrete can occur due to temperature changes at early ages and exposure to ambient temperature changes in the long term. Design codes and standards allow engineers to design for cracking by quantifying the effects of thermal variations into outputs such as limiting crack widths and reinforcement configurations. Design values given in these codes are however not fully understood by many users, may not be representative of recent developments in concrete materials technology and can potentially result in over-conservative designs. In this paper, concrete hydration temperatures were measured on site using a Thermocouple Data Logger and compared to values used in the project-specific design with the intention of providing a basis on which a database of temperatures representative of mixes commonly used in the South African industry may be compiled. Findings revealed that measured temperature values were around 30 – 50% lower than those given in design codes. Among the reasons identified for this is the fact that readily used design codes for crack-width design of water-retaining concrete structures in South Africa were compiled with data obtained from the use of 42.5 N cements, which may well have been quite different from the now more modern and readily available 52.5 N cements. Furthermore, design codes focus extensively on factors like binder content, binder type and formwork type, while the effects of other factors such as coarse aggregate type, coarse aggregate nominal size and construction sequence (which also play a significant role) are not quantified in the selection process of temperature values. Recommendations for further studies are made which aim to incorporate a wider variety of factors that affect development of thermal properties of concrete. This can allow members of the project team (engineer, contractor) to act during the relevant stages of design/construction of a project to mitigate thermal effects that can incur unwanted cracking.
APA, Harvard, Vancouver, ISO, and other styles
7

Alsahaf, Nibras Ali, Asaad Mohammed Al Gharaawyi, Layth Abdul Rasool Al Asadi, Qusay A. Jabal, and Mohammed Abbas Al-Jumaili. "Improvement of Quality of Concrete and Reducing Corrosion of Steel Reinforcement by Using Polypropylene Fibers, Styrene-Butadiene Rubber, and Integral Waterproofing Admixture." Key Engineering Materials 895 (August 3, 2021): 68–76. http://dx.doi.org/10.4028/www.scientific.net/kem.895.68.

Full text
Abstract:
Reinforced concrete foundation, rigid pavements, and other structural members with attachment with ground or salty water like piers or retaining walls and others, subjected to chloride and sulfate salts attacks and that leads to damaging the structures or at least reduce durability, some concrete admixtures like waterproofing admixtures or polymers reduce permeability and increase mechanical properties and also durability. This research aims to improve the quality of concrete and reducing corrosion of steel reinforcement by using integral waterproofing admixture, styrene-butadiene rubber (SBR) and polypropylene fibers. mechanical properties such as compressive, flexural strength highly improved in this study. The reduction of weight of steel reinforcement by subjecting reinforced concrete specimens to chloride water (6% concentration) was 2.61 % for ordinary reinforced concrete and by using waterproof –polymer concrete with poly fibers, the reduction was less and its value was 0.93% and that was for 6 months’ exposure, and for 1-year exposure, the reduction in steel reinforcement weight was 4.72% for ordinary concrete and 1.4% for waterproof concrete.
APA, Harvard, Vancouver, ISO, and other styles
8

Aniskin, Nikolai A., and Alexey M. Shaytanov. "Low-cement concrete dams: construction, structures and innovations." Vestnik MGSU, no. 7 (July 2020): 1018–29. http://dx.doi.org/10.22227/1997-0935.2020.7.1018-1029.

Full text
Abstract:
Introduction. Low-cement concrete dams are water-retaining structures frequently used in modern hydraulic engineering. The number of facilities of this type goes up every year due to their simple design, speedy construction and high economic efficiency. However, a number of problems may arise in the construction and operation of such facilities. In particular, reduced strength and water permeability of interlayer joints may constitute a problem. Temperature effects arising in the course of construction and operation may cause additional deformation of their structure, changes in their stress-strain state, opening of existing cracks and further cracking. The study of the design experience, building and operation of dams made of low-cement concrete will lay the groundwork for the development of similar structures and defect elimination methods. It will also provide an opportunity to learn more about thebehaviour of structures exposed to various conditions, including climatic ones. Materials and methods. Data on existing dams made of low-cement concrete, research articles, technical reports and conference proceedings, including those issued by the International Commission on Large Dams (ICOLD), have been collected and analyzed. Results. The comparative analysis of designs of dams in operation and future-oriented solutions is performed. The co-authors have demonstrated the need for an integrated approach to solving temperature cracking problems by using filtration through the dam body. Conclusions. The results can be used as the basis for further detailed studies. The comparative analysis of traditional and innovative waterproofing liners will help to effectively choose the protection solution for an upstream face of a facility. New forecasting methods and recommendations aimed at the reduction of negative temperature effects on the operation of facilities can solve the temperature cracking problem.
APA, Harvard, Vancouver, ISO, and other styles
9

Levkevich, Viktor, Aleksandr Buzuk, Ivan Kirvel, and Sergey Parfomuk. "Deformations of upper soil slopes of retaining structures and shores with violated reinforced concrete fastening in riverbed reservoirs in Belarus." Limnological Review 21, no. 1 (March 1, 2021): 29–41. http://dx.doi.org/10.2478/limre-2021-0003.

Full text
Abstract:
Abstract The conditions of wind waves influence on the ground upper soil slopes of retaining structures and natural shores that are fixed in the form of reinforced concrete fastening with deformations are considered. The results of modeling the regime of intra-water currents and field surveys of artificial water bodies are shown. A criterion for assessing the stability of ground slopes and coastal slopes with reinforced concrete fastening with a broken structure is proposed and the conditions for its applicability are determined. Measures for engineering protection of the reservoir shores are proposed via using a criterion for the stability of fixed slopes Пк. It is assumed that at Пк ≥ 1 the slope profile with fastening plates deformed during operation acquires the contour of the dynamic equilibrium profile adopted for the calculated type of soil as a result of the destruction of the slope by waves.
APA, Harvard, Vancouver, ISO, and other styles
10

Golgota, Alma, and Boriana Vrusho. "Aggregate Impact of the Country in Concrete Durability, that Works in Normal Environmental Conditions." European Journal of Multidisciplinary Studies 1, no. 1 (April 30, 2016): 315. http://dx.doi.org/10.26417/ejms.v1i1.p315-325.

Full text
Abstract:
Production and use of durable concrete in reinforced concrete structures is a necessity in our country. In this article it was treated as affecting the characteristics of aggregates in durable concrete production, when they work in normal environmental conditions . To achieve this goal have produced concrete of class C35 / 45 with aggregate taken in careers mountain and river. The other components are the same in mix design concrete. Water-cement ratio is 0.5 and 0:35 realized. Comparisons are made of the resistance to compression and water penetration. Cubes of concrete had been produced and treated in terms shipyard. There have been comparisons of results and following. Today in Durres, even wider, buildings constructed with durable concrete are very few in now days. Geological studies show that the soil in foundation has low retaining capacity for this city due to high friction angle. This is also one of the other factors that Seismicity of the area is very high, up to level 9 ball of Rihter. The purpose of this article is the production of durable concrete with low permeability of water. The project is constructed in our country and in particular in Durres where groundwater level is higher and the use of space efficiently needs to build parking with underground floor.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Concrete water retaining structures"

1

McLeod, Christina Helen. "Investigation into cracking in reinforced concrete water-retaining structures." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/80207.

Full text
Abstract:
Thesis (MScEng)--Stellenbosch University, 2013.
Durability and impermeability in a water-retaining structure are of prime importance if the structure is to fulfill its function over its design life. In addition, serviceability cracking tends to govern the design of water retaining structures. This research concentrates on load-induced cracking specifically that due to pure bending and to direct tension in South African reinforced concrete water retaining structures (WRS). As a South African design code for WRS does not exist at present, South African designers tend to use the British codes in the design of reinforced concrete water-retaining structures. However, with the release of the Eurocodes, the British codes have been withdrawn, creating the need for a South African code of practice for water-retaining structures. In updating the South African structural design codes, there is a move towards adopting the Eurocodes so that the South African design codes are compatible with their Eurocode counterparts. The Eurocode crack model to EN1992 (2004) was examined and compared to the corresponding British standard, BS8007 (1989). A reliability study was undertaken as the performance of the EN1992 crack model applied to South African conditions is not known. The issues of the influence of the crack width limit and model uncertainty were identified as being of importance in the reliability crack model.
APA, Harvard, Vancouver, ISO, and other styles
2

Mucambe, Edson Silva David. "Creep and shrinkage prediction models for concrete water retaining structures in South Africa." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/5185.

Full text
Abstract:
Thesis (MScEng (Civil Engineering))--University of Stellenbosch, 2010.
ENGLISH ABSTRACT: Concrete water retaining structures (WRS) in South Africa are under scrutiny due to the numerous durability problems that they have experienced lately; despite the efforts by local and national authorities in conserving these structures. At the heart of these problems are the creep and shrinkage phenomena. While shrinkage is the reduction of concrete volume with time, creep is defined as the time-dependent increase of concrete strain under constant or controlled stress. Both phenomena are affected by conditions to which WRS are exposed hence their accurate prediction is required. Numerical models have been developed to calculate the extent to which concrete creeps or shrinks over time. The objective of this thesis is to identify which of these models is better equipped to be used in South African WRS design. This is achieved through a systematic method that involves an investigation into the contents of these models and a statistical comparison of model calculations to WRS representative data. In partnership with reputable universities, a pioneer experimental creep and shrinkage data base is created in this project from which the WRS related data is selected. While investigating the contents of the numerical models, their applicability to South African WRS is identified and the integrity of model contents is assessed. Indeed, a few irregularities are found in the process and are presented in this thesis. The model calculations are statistically compared to data in the form of individual experiments as well as in the form of groups of experiments with similar concretes to find the ideal prediction model for different types of concretes as well. Also pioneered in this project is a weighted criteria and point system in which the findings of the model content assessment and statistical evaluations are incorporated. It is based on this system that conclusions are drawn and the most suitable prediction model for WRS design in South Africa is selected.
APA, Harvard, Vancouver, ISO, and other styles
3

Fourie, Johanna Aletta. "Effect of seismic loads on water-retaining structures in areas of moderate seismicity." Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/2061.

Full text
Abstract:
Thesis (MScEng (Civil Engineering))--University of Stellenbosch, 2010.
ENGLISH ABSTRACT: Water-retaining structures are commonly used in South Africa for the storage of potable water and waste water. However, a South African code pertaining to the design of concrete water-retaining structures do not currently exist and therefore use is made of the British Standard BS 8007 (1987). For the design of concrete water-retaining structures in South Africa, only the hydrostatic loads are considered while forces due to seismic activity are often neglected even though seismic excitations of moderate magnitude occur within some regions of the country. Hence, the primary aim of this study was to determine whether seismic activity, as it occurs in South Africa, has a significant influence on water-retaining structures and whether it should be considered as a critical load case. In order to assess the influence of seismic activity on the design of water-retaining structures the internal forces in the wall and the required area of reinforcement were compared. Comparisons were made between the seismic analyses and static analyses for both the ultimate and serviceability limit states. In order to obtain the internal forces in the wall use was made of an appropriate Finite element model. Three Finite element models were investigated in this study and the accuracy of each model was assessed based on the fundamental frequency, base shear force and overturning moment. These values were compared to the values obtained with the numerical method presented by Veletsos (1997) which was verified with Eurocode 8: Part 4 (2006). The results obtained indicated that seismic excitations of moderate magnitude do have a significant influence on the reinforcement required in concrete water-retaining structures. For both the ultimate limit state and serviceability limit state the required reinforcement increased significantly when seismic loads were considered in the design. As in the case for static design of water-retaining structures, the serviceability limit state also dominated the design of these structures under seismic loading.
AFRIKAANSE OPSOMMING: Beton waterhoudende strukture in Suid-Afrika word op ‘n gereelde basis gebruik vir die stoor van drink- sowel as afvalwater. ‘n Suid-Afrikaanse kode vir die ontwerp van hierdie strukture bestaan egter nie en dus word die Britse kode BS 8007 (1987) hiervoor gebruik. Vir ontwerp doeleindes word soms slegs die hidrostatiese kragte beskou terwyl kragte as gevolg van seismiese aktiwiteite nie noodwendig in berekening gebring word nie. Seismiese aktiwiteite van gematigde grootte kom egter wel voor in sekere dele van Suid-Afrika. Die hoofdoel van hierdie studie was dus om die invloed van seismiese aktiwiteite, soos voorgeskryf vir Suid-Afrikaanse toestande, op beton waterhoudende strukture te evalueer asook om te bepaal of dit ‘n kritiese lasgevalle sal wees. Vir hierdie doel is die interne kragte asook die area staal bewapening vir elk van die statiese en dinamiese lasgevalle vergelyk. Vergelykings is getref tussen die dinamiese en statiese resultate vir beide die swigtoestand en die diensbaarheidstoestand. Vir die bepaling van die interne kragte is gebruik gemaak van eindige element modelle. Tydens hierdie studie was drie eindige element modelle ondersoek en die akkuraatheid van elk geëvalueer op grond van die fundamentele frekwensie, die fondasie skuifkrag en die omkeermoment. Hierdie waardes was ondermeer bereken met twee numeriese metodes soos uiteengesit in Veletsos (1997) en Eurocode 8: Part 4 (2006). Die resultate dui daarop dat die invloed van seismiese aktiwiteite op beton waterhoudende strukture in Suid-Afrika nie weglaatbaar klein is nie en wel in berekening gebring behoort te word tydens die ontwerp. Die interne kragte vir beide die swigtoestand en diensbaarheidstoestand is aansienlik hoër vir die seismiese lasgeval as vir die statiese geval. Die diensbaarheidstoestand het deurentyd die ontwerp van beton waterhoudende strukture vir seismiese toestande oorheers.
APA, Harvard, Vancouver, ISO, and other styles
4

Johansson, Anders. "Impregnation of concrete structures : transportation and fixation of moisture in water repellent treated concrete." Licentiate thesis, Stockholm : Division of Structural Design and Bridges, Royal Institute of Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4160.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Selander, Anders. "Hydrophobic Impregnation of Concrete Structures : Effects on Concrete Properties." Doctoral thesis, KTH, Brobyggnad inkl stålbyggnad, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-12179.

Full text
Abstract:
Hydrophobic impregnations often referred to as water repellent agents, today mainly consisting of alkylalkoxysilanes, are often used on concrete to prolong the service life of the structure. This is accomplished by protecting the reinforcement bars from chlorides or by changing the moisture content inside. When the concrete is treated with a water repellent agent the properties of the surface layer becomes hydrophobic and thereby water droplets are stopped from entering, still allowing water vapour to pass through. This change can reduce chloride ingress and stop heavy rain from penetrating through the surface layer. This thesis presents results concerning how the properties of concrete are affected by a hydrophobic impregnation. Moisture transport and fixation in the surface layer of the concrete are studied as well as the secondary effects of more practical use such as the effect on chloride ingress, water absorption and humidity level. It also presents results on how the penetration depth and concentration of the water repellent agent (i) depend on a number of parameters, and (ii) affect the outcome of the treatment. Water repellent treatments on a number of different concrete structures in Stockholm, ranging from tunnel to high-rice building, are evaluated as well. The three most important factors for the penetration of any water repellent agent into concrete are time, porosity and degree of saturation. A semi-empirical equation is derived that gives an idea on how much these factors affect the efficient penetration depth of the water repellent agent. The depth and concentration have a major effect on the performance of the treatment. The moisture diffusion coefficient for a water repellent treated concrete is close to constant and not nearly as dependent on the relative humidity (RH) as for untreated concrete. Unlike untreated concrete, where capillary suction plays an important role for the moisture transport at high RH, the vapour transport is the dominant transport mechanism even at high RH for water repellent treated concrete. The moisture fixation is affected by a water repellent treatment and the effect is clearest at high moisture levels. The main reason for this is that the capillary porosity is affected by the treatment to a relatively high degree while the gel porosity to a large extent remains unaffected. A hypothesis is presented which suggests that the RH inside the concrete at the time of the treatment affects not only the depth and concentration but also in which range of pore radii the water repellent agent is present and active. The durability of hydrophobic impregnations can be divided into surface effects and in depth effects. The first is sensitive to the environmental and mechanical loadings and normally disappears within a year while the later can be long lasting if a sufficient depth is reached. Hydrophobic impregnations are not the answer to all problems in concrete related to moisture, but if correctly used it can prolong the service life of the structure which will lead to savings of natural resources and thus both economical and environmental savings for the community.
Vattenavvisande impregneringsmedel, som i dagsläget till största del består av alkylalkoxysilaner, används ofta på betong för att förlänga livslängden på konstruktionen. Detta syfte uppnås genom att armeringen skyddas mot klorider eller att fukthalten inuti betongen sänks. När betongen impregneras ändras ytskiktets fuktmekaniska egenskaper från hydrofila till hydrofoba vilket gör att vattendroppar kan stoppas medan vattenånga tillåts passera. Dessa förändrade egenskaper kan medföra att kloridinträngningen minskar och att kraftiga regn inte tränger genom det impregnerade skiktet. Denna avhandling presenterar resultat om hur betongen påverkas av en vattenavvisande impregnering. Fukttransport och fuktfixering i betongens ytskikt har undersökts men även sekundära effekter som kloridinträngning, vattenabsorption och förändring i fuktinnehåll vilka alla är av större praktisk nytta. Avhandlingen presenterar också resultat om vilka faktorer som påverkar impregneringens inträngningsdjup och koncentration samt vilken betydelse dessa har för funktionen. För att utvärdera impregneringars effekt i olika miljöer har ett stort antal objekt i Stockholm undersökts, innefattande olika konstruktioner från en tunnel till höghus. Impregneringens inträngningsdjup och koncentration har en avgörande betydelse för dess funktion. De tre viktigaste faktorerna för alla impregneringsmedels inträngning i betong är tid, porositet och fuktnivå. En semiempirisk ekvation har tagits fram där det framgår hur dessa tre faktorer påverkar det slutliga inträngningsdjupet för impregneringen. Till skillnad från obehandlad betong är transportkoefficienten för en impregnerad betong nästan oberoende av den relativa fuktigheten (RF) i omgivningen. Vid höga RF, där största delen av fukttransporten i obehandlad betong sker på grund av kapillärkrafter, är ångtransporten fortfarande den dominerande transportmekanismen i impregnerad betong. Fuktfixeringen i betong påverkas av en impregnering och effekten är störst vid höga RF. Det är dock tydligt att en viss mängd fukt finns inuti den impregnerade betongen. Detta kan förklaras med att största delen av kapillärporerna påverkas av impregneringen medan gelporerna förblir obehandlade. Resultaten indikerar också att fuktnivån vid impregneringstillfället avgör vilken del av porsystemet som kan behandlas och inte bara koncentrationen och inträngningsdjupet. Långtidsegenskaperna hos impregneringen kan delas upp i yt- och djupeffekt. Effekten på ytan avtar normalt sett inom ett år på grund av damm och partiklar, UV-ljus, slitage mm. Djupeffekten påverkas däremot inte av dessa faktorer och kan finnas kvar i decennier. Vattenavvisande impregneringar är inte lösningen på alla fuktrelaterade problem i betong, men om de används på rätt sätt så kan det förlänga livslängden på många konstruktioner. Detta leder till ett bättre hushållande med naturresurser och därmed både ekonomiska och miljömässiga besparingar för samhället.
QC20100715
APA, Harvard, Vancouver, ISO, and other styles
6

Aldred, James M. "Water transport due to wick action through concrete." Curtin University of Technology, Department of Civil Engineering, 2008. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=120048.

Full text
Abstract:
Wick action is the transport of water through a concrete element from a face in contact with water to a drying face as occurs in basements, tunnels, slabs on grade and hollow offshore structures. Water transport through concrete due to wick action is many times greater due to pressure permeability under typical environmental conditions. Therefore wick action plays an important role in the watertightness and durability of concrete structures. Current models of wick action are based on an equilibrium developing between the rate of water entering concrete by sorptivity and leaving by water vapour diffusion where initial moisture content should not change the steady state rate, only the dominant factor in the early stages.
Wick action tests were conducted on concrete specimens of varying initial moisture condition, thickness, orientation and composition over periods ranging up to 450 days. Some wick action tests were conducted at 50% and 75% relative humidity and using a penetrating solution of reduced surface tension. The rate of wick action was found to be inversely proportional to thickness regardless of the initial moisture content of the specimen. Initial saturation was found to significantly increase wick action and moisture flow in ordinary Portland cement (OPC) and hydrophobic (HI) concretes drying at 75% RH and HI concrete drying at 50% RH. The data are consistent with the well documented hysteresis between sorption/desorption isotherms. Concretes containing silica fume (SF) and ground granulated blast-furnace slag (GGBS) did not exhibit such hysteresis. Reducing the surface tension of the pentrating solution profoundly reduced the sorptivity into dried specimens but not the depth of penetration or the steady state wick action rate. Direct measurements on osmotic flow through vacuum saturated specimens showed that osmotic effects had a limited effect on wick action at salt concentrations expected in most environmental conditions.
The research demonstrates that desorptivity from the drying surface rather than sorptivity into the wetting surface is the dominant factor determining wick action through concrete. The ease with which desorptivity can be measured and the simple empirical model developed provides practicising engineers with a useful tool to estimate water transport due to wick action through concrete in partially immersed conditions.
APA, Harvard, Vancouver, ISO, and other styles
7

Eriksson, Daniel. "Numerical models for degradation of concrete in hydraulic structures due to long-term contact with water." Licentiate thesis, KTH, Betongbyggnad, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-225125.

Full text
Abstract:
The durability of concrete is of major concern in all types of concrete structures where the combined effect of exposure conditions and the type and quality of the concrete material usually determines the rate of degradation. Furthermore, there are synergy effects between different deterioration mechanisms, which means that the combined rate of degradation is higher than the sum of the individual rates of each mechanism. Therefore, to accurately predict the residual service life of existing structures or when designing new structures, it is essential to consider all these aspects. This means that various chemical and physical processes, as well as how these interact, must be taken into account in models aiming to be used for service life predictions. This thesis presents the first part of a research project with the aim to investigate common deterioration mechanisms of concrete in hydraulic structures, and to improve the knowledge how these and other related phenomena can be described using mathematical models. The objective is also to study how different mechanisms interact and to find suitable approaches to account for these interactions in the models. To this end, a literature survey on commonly detected damage in hydraulic structures is presented. In addition, it also addresses in what types of and where in hydraulic structures the various damage types are usually observed. The mathematical models presented in this part of the project are focused on long-term water absorption in air-entrained concrete as well as on freezing of partially saturated air-entrained concrete. Both models are based on a multiphase description of concrete and poromechanics to describe the coupled hygro-thermo-mechanical behaviour. The thesis also presents some of the basic concepts of multiphase modelling of porous media, including discretization of the models using the finite element method (FEM). Furthermore, it covers the simplifications that are usually introduced in the general macroscopic balance equations for mass, energy and linear momentum when modelling cement-based materials. To verify the developed models and to show their capabilities, simulation results are compared with experimental data, in situ measurements and other simulations from the literature. The results indicate that both models perform well and can be used to predict long-term moisture conditions in hydraulic structures as well as freezing-induced strains in partially saturated air-entrained concrete, respectively. Even though no interactions with other deterioration mechanisms are included in the models, the development and use of these have given insights to which parameters that are important to consider in such extensions. Furthermore, based on the insights gained, the complexity of describing the full interactions between several mechanisms in mathematical models is also discussed. It is concluded that models aiming to be used for service life predictions of hydraulic structures in day-to-day engineering work need to be simplified. However, the type of advanced models presented in this thesis can serve as a basis to study which aspects and parameters that are essential to consider in simplified prediction models.
Beständigheten hos betong är av avgörande betydelse i alla typer av betongkonstruktioner där den kombinerade effekten av exponeringsförhållanden samt typ och kvalitet på betongmaterialet vanligtvis avgör nedbrytningshastigheten. Dessutom finns synergieffekter mellan olika nedbrytningsmekanismer som innebär att den kombinerade nedbrytningshastigheten är större än summan av de enskilda nedbrytningshastigheterna. För att noggrant kunna prediktera den återstående livislängden hos befintliga konstruktioner eller vid design av nya konstruktioner är det därför viktigt att ta hänsyn till samtliga av dessa aspekter. Detta innebär att olika kemiska och fysikaliska processer, samt hur dessa interagerar med varandra, måste tas i beaktande i modeller som avses användas för livslängdsbedömningar. Den här licentiatuppsatsen presenterar den första delen av ett forskningsprojekt där målet är att studera vanligt förekommande nedbrytningsmekanismer i vattenbyggnadskonstruktioner och att öka kunskapen om hur dessa och andra relaterade fenomen kan beskrivas med matematiska modeller. Målet är också att studera hur olika nedbrytningsmekanismer samverkar och att hitta lämpliga tillvägagångssätt att ta hänsyn till dessa interaktioner i modellerna. För detta ändamål presenteras en litteraturstudie avseende vanligt förekommande skador i vattenbyggnadskonstruktioner. Dessutom behandlar denna i vilka typer av vattenbyggnadskonstruktioner och var i dessa som de olika typerna av skador vanligtvis observeras. De matematiska modeller som presenteras i denna del av projektet är inriktade på långtidsabsorption av vatten i lufttillsatt betong samt på frysning i delvis vattenmättad lufttillsatt betong. Båda modellerna är baserade på en multifasbeskrivning av betong samt poromekanik för att beskriva det kopplade hydro-termo-mekaniska beteendet. Uppsatsen presenterar också några av de grundläggande koncepten gällande multifasmodellering av porösa material, inklusive diskretisering av modellerna genom användning av finita elementmetoden (FEM). Dessutom beskrivs de förenklingar som vanligtvis införs i de generella makroskopiska balansekvationerna för massa, energi och rörelsemängd då cementbaserade material modelleras. Simuleringsresultat från de utvecklade modellerna jämförs med försöksdata, fältmätningar samt andra simuleringsresultat från litteraturen för att verifiera modellerna samt visa hur de beter sig. Resultaten visar att båda modellerna ger tillfredställande resultat och kan användas för att uppskatta de långsiktiga fuktförhållandena i vattenbyggnadskonstruktioner samt frysinducerade töjningar i delvis vattenmättad lufttillsatt betong. Även om inga interaktioner mellan andra nedbrytningsmekanismer inkluderades i modellerna, så har utvecklingen samt användandet av dessa gett insikter gällande vilka parametrar som är viktiga att beakta i sådana vidareutvecklingar. Baserat på dessa insikter diskuteras också komplexiteten i att beskriva interaktionen mellan flertalet mekanismer i matematiska modeller. Det konstateras också att modeller som avses användas i dagligt ingenjörsarbete för livstidsbedömningar av vattenbyggnadskonstruktioner behöver förenklas. Däremot kan den typ av avancerade modeller som presenteras i denna uppsats användas som en grund för att studera vilka aspekter och parametrar som är viktiga att beakta i förenklade modeller.

QC 20180403

APA, Harvard, Vancouver, ISO, and other styles
8

Kollárik, Adrián. "Monolitická železobetonová nádrž." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409794.

Full text
Abstract:
The thesis deals with design and assessment of all supporting parts of cast-in-place reinforced concrete tank. The thesis includes a technical report, static analysis, drawing documentations, construction proces and visualization. The drawing documentation consists of shape and reinforcement drawings of supporting parts.
APA, Harvard, Vancouver, ISO, and other styles
9

Courtois, Alexis. "Contribution à la surveillance des structures épaisses en béton : proposition d'une démarche pour intégrer le suivi de la teneur en eau dans le pronostic." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLN040/document.

Full text
Abstract:
Cette recherche s’inscrit dans le cadre de la surveillance structurale des enceintes de confinement des centrales nucléaires qu’EDF exploite. L’objectif est de déterminer comment la connaissance de la teneur en eau du béton de ces ouvrages pourrait améliorer les prédictions de leur comportement mécanique, qui sont régulièrement réalisées dans le cadre de la démonstration de sûreté des installations.Dans un premier temps, nous avons étudié comment les incertitudes de mesure d’auscultation se propageaient dans les modèles pour quantifier l’information apportée par la mesure de teneur en eau. Nous avons également considéré les effets de ces incertitudes sur les extrapolations en fin de vie de l’ouvrage. Dans un second temps, nous avons proposé un modèle de surveillance des déformations différées comprenant la teneur en eau comme variable explicative et fondé sur une dépendance linéaire avec les déformations. Cette approche a été validée grâce aux données issues de la maquette VeRCoRs.Nous avons voulu ensuite estimer plus précisément l’exigence métrologique pour qualifier les chaines de mesure in situ de teneur en eau des bétons. Pour cela, nous avons utilisé la méthode de Monte Carlo pour simuler la propagation des incertitudes de mesures, en comparant les performances du modèle que nous proposions avec celles d’une approche d’ingénierie plus classique
This research takes place within the framework of the structural monitoring of nuclear power plant containments that EDF operates. Our goal is to determine how the knowledge of the concrete water content these structures could improve the predictions of their mechanical behavior, which are periodically undertaken as part of the safety case for the facilities.As a first step, we have studied monitoring data uncertainties propagation through the models, in order to quantify the information brought by the water content measurement. We have also addressed the effects of these uncertainties on the extrapolations to the end of the structure lifetime. In a second phase, we have proposed a delayed deformation monitoring model including water content as an explanatory variable and based on a linear dependence with strains. This approach has been validated with data from the VeRCoRs mock up.Then, we sought to estimate more accurately the metrological requirement to qualify in-situ measurement systems for concrete water content. To do this, we used the Monte Carlo method to simulate the propagation of measurement uncertainties, by comparing the performances of the model that we proposed with those of a more conventional engineering approach
APA, Harvard, Vancouver, ISO, and other styles
10

Trindade, Eduarda Carlesso. "Corrosão acelerada por imersão modificada (ensaio CAIM) de estruturas de concreto armado contendo cinza da casaca de arroz e agua da mandioca brava." Universidade Federal do Pampa, 2013. http://dspace.unipampa.edu.br:8080/xmlui/handle/riu/760.

Full text
Abstract:
Submitted by Cátia Araújo (catia.araujo@unipampa.edu.br) on 2017-01-25T11:42:49Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Corrosao acelerada por imersao modificada (ensaio CAIM) de estruturas de concreto armado contendo cinza da casaca de arroz e agua da mandioca brava.pdf: 4431848 bytes, checksum: a3ec1c3261aeadc9e8ab4cda79be3199 (MD5)
Approved for entry into archive by Cátia Araújo (catia.araujo@unipampa.edu.br) on 2017-01-25T11:44:41Z (GMT) No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Corrosao acelerada por imersao modificada (ensaio CAIM) de estruturas de concreto armado contendo cinza da casaca de arroz e agua da mandioca brava.pdf: 4431848 bytes, checksum: a3ec1c3261aeadc9e8ab4cda79be3199 (MD5)
Made available in DSpace on 2017-01-25T11:44:41Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Corrosao acelerada por imersao modificada (ensaio CAIM) de estruturas de concreto armado contendo cinza da casaca de arroz e agua da mandioca brava.pdf: 4431848 bytes, checksum: a3ec1c3261aeadc9e8ab4cda79be3199 (MD5) Previous issue date: 2013-12-06
A corrosão de armaduras e uma das manifestações patológicas mais comuns encontradas em estruturas de concreto armado, consistindo em um processo eletroquímico onde a agua presente no concreto atua como eletrólito. Neste sentido através do ensaios de corrosão acelerados (ensaio CAIM) comparou-se a resistência a corrosão no concreto armado de diferentes traços na presença e ausência de insumos agrícolas como a cinza da casca de arroz e agua extraída da mandioca brava. O objetivo principal do presente trabalho foi seleciona qual (quais) o (s) traços (s) com similaridade de resistência frente ao processo de corrosão e teor de argamassa apresentaram maior resistência frente ao processo de corrosão em meio contendo íons cloretos (solução que simula agua do mar - 35g/L NaCl), aplicando-se voltagens de 15, 30 e 70V durante 8, 24 e 48h. A cinza de casca de arroz e a agua extraída da mandioca brava foram caracterizadas pelas técnicas de analise de espectroscopia de infravermelho e de difração de raios-X. Os grupos funcionais silanol e carboxila foram detectados nestes subprodutos agrícolas e relacionados a um mecanismo proposto de inibição contra a corrosão na armadura conforme dados do ensaio CAIM. Analises de microscopia eletrônica de varredura e energia dispersiva de raios-X colaboraram para elucidar o mecanismo proposto. Enquanto que as analises de perda de massa e quantificação de cloretos no concreto apos ensaio CAIM através do método de Mohr auxiliaram na validação dos resultados do ensaio.
The corrosion in armatures is one of the most common pathologies found in structures of concrete, consisting in an electrochemical process, where the water in the concrete acts as an electrolyte. In this way, through the assays of accelerated corrosion (CAIM Tests), the resistance to corrosion in concrete of different mixtures was compared with the presence and absence of agricultural input so as rice husk and water from mandioca brava. The main objective of this work is to select mixture with similarity in resistance to compression and group content present the biggest resistance against the corrosion process amid containing chloride ions (solution simulating seawater – 35g/L NaCI), applying voltages of 15, 30 and 70V during 8, 24 and 48h. The cinder of rice husk and the water extracted from mandioca brava were characterized by the infrared spectroscopy analysis technics and by X-ray diffraction. The functional groups of silanol and carboxyl were detected in these agricultural byproducts and related to a proposed inhibition mechanism against the corrosion in armatures seen in CAIM data test. Electronic scanning microscopic analysis and dispersive X-ray energy collaborated to elucidated the proposed mechanism. While the studies in weight loss and chloride quantification in concrete after the CAIM test through the Mohr method helped in the validation of the assay results.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Concrete water retaining structures"

1

Poukhonto, L. M. Durability of concrete structures and constructions: Silos, bunkers, reservoirs, water towers, retaining walls ; translated from Russian. Lisse: Balkema, 2003.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Design of liquid retaining concrete structures. 2nd ed. New York: McGraw-Hill, 1992.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Anchor, R. D. Design of liquid retaining concrete structures. 2nd ed. London: E. Arnold, 1992.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Batty, Ian. The design of water-retaining structures. New York: J. Wiley & Sons, 1991.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Institution, British Standards. BS 8007: Design of concrete structures for retaining aqueous liquids. London: BSI, 1987.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Design of concrete structures for retaining aqueous liquids: Design tables to BS 8007. London: Thomas Telford, 1996.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Momber, Andreas W. Hydrodemolition of concrete surfaces and reinforced concrete structures. Oxford: Elsevier, 2005.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Ling, Hoe I. Seismic testing: Geogrid reinforced soil structures faced with segmental retaining wall block : executive summary. Edina, MN: Allan Block Corp., 2003.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

Bullock, Rupert E. REMR management systems--navigation and reservoir structures, condition rating procedures for concrete in gravity dams, retaining walls, and spillways. [Champaign, Ill.]: US Army Corps of Engineers, Construction Engineering Research Laboratories, 1995.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

Koltuniuk, Roman Marian. Investigating the influence of high water pressure on cracked surfaces of offshore concrete structures. Ottawa: National Library of Canada, 1990.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Concrete water retaining structures"

1

Mosley, W. H., and J. H. Bungey. "Water-retaining Structures and Retaining Walls." In Reinforced Concrete Design, 296–328. London: Macmillan Education UK, 1990. http://dx.doi.org/10.1007/978-1-349-13058-0_11.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Mosley, W. H., and J. H. Bungey. "Water-retaining Structures and Retaining Walls." In Reinforced Concrete Design, 296–326. London: Macmillan Education UK, 1987. http://dx.doi.org/10.1007/978-1-349-18825-3_11.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Mosley, W. H., and J. H. Bungey. "Water-retaining Structures and Retaining Walls." In Reinforced Concrete Design, 296–328. London: Macmillan Education UK, 1990. http://dx.doi.org/10.1007/978-1-349-20929-3_11.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Mosley, W. H., J. H. Bungey, and R. Hulse. "Water-retaining structures and retaining walls." In Reinforced Concrete Design, 274–304. London: Macmillan Education UK, 1999. http://dx.doi.org/10.1007/978-1-349-14911-7_11.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Kianoush, M. Reza. "Seismic design of concrete water retaining structures." In Earthquake Engineering, edited by Shamim A. Sheikh and S. M. Uzumeri, 543–50. Toronto: University of Toronto Press, 1991. http://dx.doi.org/10.3138/9781487583217-069.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Vrijling, J. K. "Probablistic Design of Water-Retaining Structures." In Engineering Reliability and Risk in Water Resources, 115–34. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3577-8_7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Bažant, Zdeněk P., and Milan Jirásek. "Temperature Effect on Water Diffusion, Hydration Rate, Creep and Shrinkage." In Creep and Hygrothermal Effects in Concrete Structures, 607–86. Dordrecht: Springer Netherlands, 2018. http://dx.doi.org/10.1007/978-94-024-1138-6_13.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Aldea, Corina-Maria, Masoud Ghandehari, Surendra P. Shah, and Alan Karr. "New Experimental Study Relating Cracking to Water Permeability of Normal Strength Concrete." In Materials for Buildings and Structures, 170–74. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2005. http://dx.doi.org/10.1002/3527606211.ch24.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Yao, Jia-liang, Zhen-quan Wang, and Dong-han Tang. "Development and Application of Water-Saving and Moisture-Retaining Membrane Made from Controllable High Polymer Materials for Concrete Curing." In Pavement Materials and Associated Geotechnical Aspects of Civil Infrastructures, 1–20. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-95759-3_1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Mao, Gang. "A Study of Bio-Computational Design in Terms of Enhancing Water Absorption by Method of Bionics Within the Architectural Fields." In Proceedings of the 2021 DigitalFUTURES, 102–13. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-5983-6_10.

Full text
Abstract:
AbstractThis essay aims to explore an architecture computational design intended to accept and absorb moisture through geometrical and material conditions, and using design strategies, help deliver this moisture upwards through capillary action to areas of cryptogamic growth including mosses and smaller ferns on the surface of architecture. The purpose of this research project is to explore the morphology of general capillary systems based on research into the principle of xylematic structures in trees, thereby creating a range of capillary designs using three types of material: plaster, 3D print plastic, and concrete. In addition, computational studies are used to examine various types of computational designs of organic structures, such as columns, driven by physical and environmental conditions such as sunshine, shade, tides and other biological processes to explore three-dimensional particle-based branching systems that define both structural and water delivery paths.
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Concrete water retaining structures"

1

Kalam Azad, Abul, and Saad Aiban. "An Assessment of Below Water Table Retaining Wall Underpass Built with Heavy-Weight Concrete as Counterweight." In Research, Development and Practice in Structural Engineering and Construction. Singapore: Research Publishing Services, 2012. http://dx.doi.org/10.3850/978-981-08-7920-4_st-31-0111.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Binder, Fritz, Stefan L. Burtscher, and Alfred Strauss. "Prediction of chloride profiles and discussion of time variant alterations." In IABSE Symposium, Guimarães 2019: Towards a Resilient Built Environment Risk and Asset Management. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2019. http://dx.doi.org/10.2749/guimaraes.2019.1250.

Full text
Abstract:
<p>For a highway operator, such as ASFiNAG, bridges are very important assets. Despite all regular maintenance measures, these structures are strongly subjected to ageing and degradation, because of their exposure. Thus, leading to high maintenance expenditures. In Austria strong winters are obligatory and, therefore, de-icing measures are used for thawing. These substances contain chlorides, which are dissolved in water. Several elements of the bridges – especially the columns – are severely exposed. The exposure over many years leads to serious concrete degradation, depassivation of the rebars and pitting corrosion.</p><p>The LA-ICP-MS (Laser Ablation Inductively Coupled Plasma Mass Spectrometry) method presented in this paper is a fast and reliable analysis strategy and a novel technique in terms determination the chloride content in the cement phase of existing concrete structures. The high accuracy and depth resolution of the chloride profiles enable a more precise data assessment for forecast models. For this purpose, chloride profiles were taken from a retaining wall at different heights in weekly intervals in the year 2016/2017 and in October of 2012. In conjunction with moisture monitoring and additional environmental data, as well as data from the de-icing salt deposit, it reveals important interrelations and dependencies to the measured profiles. This data enables new insight in the prediction of the development of the chloride profiles over time and depth. To apply the findings into practice, two analytical models were used to show the complexity and sensitivity of the derived input parameters.</p>
APA, Harvard, Vancouver, ISO, and other styles
3

Tiwari, Binod, Beena Ajmera, and Diego Villegas. "Cyclically Induced Deformations in Lightweight Cellular Concrete Backfilled Retaining Structures." In IFCEE 2018. Reston, VA: American Society of Civil Engineers, 2018. http://dx.doi.org/10.1061/9780784481608.013.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Mohammad, Tareq Rasheed A. "Failure of a Ten-Storey Reinforced Concrete Building Tied To Retaining Wall: Evaluation, Causes, and Lessons Learned." In Structures Congress 2005. Reston, VA: American Society of Civil Engineers, 2005. http://dx.doi.org/10.1061/40753(171)239.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Liepins, Atis A., and Gunjeet Juneja. "Concrete Shear Strength of Elevated Water Storage Tank Pedestals." In Structures Congress 2011. Reston, VA: American Society of Civil Engineers, 2011. http://dx.doi.org/10.1061/41171(401)216.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Vyšvařil, Martin, and Patrik Bayer. "Cellulose ethers as water-retaining agents in natural hydraulic lime mortars." In The 13th international scientific conference “Modern Building Materials, Structures and Techniques”. Vilnius Gediminas Technical University, 2019. http://dx.doi.org/10.3846/mbmst.2019.014.

Full text
Abstract:
Cellulose ethers (CEs) are commonly used as viscosity enhancing, water retaining agents in cement-based mortars. Nevertheless, studies about the effect of CEs on the properties of natural hydraulic lime-based mortars (NHL) are absent, although the use of mortars with hydraulic lime is often preferred for renovation purposes. In this study, the behavior of NHL mortars modified by four different CEs is assessed. The fresh state of mortars was characterized by water retention, air content, density a consistency. Hardened mortars were submitted to strength determination, study of pore size distribution, and thermogravimetric analyses. Transport of liquid water in the studied materials was characterized by water absorption coefficient, sorptivity, and liquid water diffusivity. Durability of the prepared mortars was monitored by frost-resistance tests. The results revealed elevated air content and water retention in mortars with increasing dose of CEs resulting in decreased density of fresh mortars. The strengths of modified mortars surpassed the reference ones at age of 180 d despite the fact that the mortars showed higher open porosity and water absorption. Enhanced porosity of mortars resulted in improvement of their frost resistance and faster carbonation. From a practical and economical point of view, the CEs dosage of 0.5% by weight of the binder appears to be sufficient.
APA, Harvard, Vancouver, ISO, and other styles
7

Xu, Xiaoxiao, Haibin Yang, Hongzhi Cui, Zitao Lin, and Tommy Yiu Lo. "Study of Water Permeability of Lightweight Concrete." In International Conference on the Durability of Concrete Structures. Purdue University Press, 2016. http://dx.doi.org/10.5703/1288284316117.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Alain, Giorla, Yann Le Pape, and Hai Huang. "Meso-scale Modeling of Irradiation Damage in Pressurized Water Reactor Concrete Biological Shields." In 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures. IA-FraMCoS, 2016. http://dx.doi.org/10.21012/fc9.238.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Li, Guo, Xiaoling Li, Rongrong Wei, Jianmin Du, and Xiaosuo Wu. "Concrete Carbonation and Chloride Resistance Under Initial Hot Water Curing." In International Conference on the Durability of Concrete Structures. Purdue University Libraries Scholarly Publishing Services, 2014. http://dx.doi.org/10.5703/1288284315383.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Kucharczykova, B. "Complex evaluation of the mechanical and fracture properties of cementitious materials with different water-cement ratio." In 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures. IA-FraMCoS, 2019. http://dx.doi.org/10.21012/fc10.233083.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Concrete water retaining structures"

1

Ebeling, Robert, and Barry White. Load factors for earth retaining, reinforced concrete hydraulic structures based on a reliability index (β ) derived from the Probability of Unsatisfactory Performance (PUP) : phase 1 study. Engineer Research and Development Center (U.S.), June 2019. http://dx.doi.org/10.21079/11681/33227.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Ebeling, Robert, and Barry White. Load and resistance factors for earth retaining, reinforced concrete hydraulic structures based on a reliability index (β) derived from the Probability of Unsatisfactory Performance (PUP) : phase 2 study. Engineer Research and Development Center (U.S.), March 2021. http://dx.doi.org/10.21079/11681/39881.

Full text
Abstract:
This technical report documents the second of a two-phase research and development (R&D) study in support of the development of a combined Load and Resistance Factor Design (LRFD) methodology that accommodates geotechnical as well as structural design limit states for design of the U.S. Army Corps of Engineers (USACE) reinforced concrete, hydraulic navigation structures. To this end, this R&D effort extends reliability procedures that have been developed for other non-USACE structural systems to encompass USACE hydraulic structures. Many of these reinforced concrete, hydraulic structures are founded on and/or retain earth or are buttressed by an earthen feature. Consequently, the design of many of these hydraulic structures involves significant soil structure interaction. Development of the required reliability and corresponding LRFD procedures has been lagging in the geotechnical topic area as compared to those for structural limit state considerations and have therefore been the focus of this second-phase R&D effort. Design of an example T-Wall hydraulic structure involves consideration of five geotechnical and structural limit states. New numerical procedures have been developed for precise multiple limit state reliability calculations and for complete LRFD analysis of this example T-Wall reinforced concrete, hydraulic structure.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Concrete water retaining structures' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography