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Dissertations / Theses on the topic 'Concrete technology'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Kevern, John Tristan. "Advancements in pervious concrete technology." [Ames, Iowa : Iowa State University], 2008.

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2

Hardon, Roger G. "Technology of repair for corroded reinforced concrete." Thesis, Aston University, 1989. http://publications.aston.ac.uk/14268/.

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A number of factors relating to various methods of repair for chloride initiated corrosion damage of reinforced concrete have been studied. A novel methodology has been developed to facilitate the measurement of macro and micro-cell corrosion rates for steel electrodes embedded in mortar prisms containing a chloride gradient. The galvanic bar specimen comprised electrically isolatable segmental mild steel electrodes and was constructed such that macro-cell corrosion currents were determinable for a number of electrode combinations. From this, the conditions giving rise to an incipient anode we

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3

Catley, David Gerald. "Thermal curing of concrete with conductive polymer technology." Thesis, Sheffield Hallam University, 2009. http://shura.shu.ac.uk/19431/.

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Concrete is used on the majority of all construction projects. It is manufactured using the core constituents of a cement binder, typically Portland Cement, proportions of coarse and fine aggregates and water. The strength development of concrete is achieved by the addition of water that reacts with the binder in the form of a hydration reaction. This hydration reaction or strength development is dependant on two primary curing factors, time and temperature. Increasing the rate of strength development of concrete by elevating the curing temperature at early ages has advantages of maximising co

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4

Rezaei, Ehsan. "Vibrations of partly supported concrete railway sleeper." Thesis, Linköping University, Solid Mechanics, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-57679.

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<p>Analytical and finite element solutions to the problem of a vibrating beam on an elastic foundation are presented. An application example is a concrete railway sleeper embedded in an elastic medium (the ballast). The sleeper is also elastically connected to the rails. Eigenfrequencies are calculated and vibration modes are discussed. The beam (sleeper) is divided into sections where each section may or may not be supported by the elastic foundation. The elastic connections to the rails are situated at the two joinings of the three sleeper sections.</p><p>Some conclusions are that Euler-Bern

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Altobelli, Frank Robert. "An innovative technology in concrete construction--semi-automated rebar tying." Thesis, Massachusetts Institute of Technology, 1991. http://hdl.handle.net/1721.1/45703.

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6

KING-NYGREN, ELIAS. "Analysis of Complex 3D-Concrete Casting." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-299789.

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Concrete is the second most used material in the world and is primarily used within the construction industry. It is however also used for making decorative and functional smaller products within various industries. Manufacturing with concrete can be done with different manufacturing techniques, the most common technique being concrete casting in molds. This project was conducted at Arclight AB in Stockholm, a company on the verge of starting production of molds for casting concrete products. With many different manufacturing techniques at their disposal, it is however difficult for them to kn

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7

Cortis, Michael. "Numerical modelling of braided fibres for reinforced concrete." Thesis, University of Glasgow, 2016. http://theses.gla.ac.uk/7763/.

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Fire has been always a major concern for designers of steel and concrete structures. Designing fire-resistant structural elements is not an easy task due to several limitations such as the lack of fire-resistant construction materials. Concrete reinforcement cover and external insulation are the most commonly adopted systems to protect concrete and steel from overheating, while spalling of concrete is minimised by using HPFRC instead of standard concrete. Although these methodologies work very well for low rise concrete structures, this is not the case for high-rise and inaccessible buildings

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8

El-Dharat, A. A. G. "The structural behaviour of composite reinforced concrete trough floors." Thesis, University of Salford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.356194.

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9

Coyle, Neil Robert. "Development of fully composite steel-concrete-steel beam elements." Thesis, University of Dundee, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.270046.

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Steel-Concrete-Steel (SCS) composite construction consists of two relatively thin steel plates with the space between filled with concrete. Various forms of this construction exist, using overlapping shear studs and single bar connectors to provide shear reinforcement to the concrete and provide a shear transfer at the interface. The problem with current systems that rely purely upon shear studs or bar connectors is that they are prone to slip between the steel faceplates and concrete core. This slip leads to a loss of composite action causing a loss of stiffness and a reduced fatigue life. An

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Dennington, Simon P. J. "The effect of carboxylated acrylic polymer latices on the hydration kinetics of ordinary Portland cement." Thesis, University of Bristol, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390101.

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11

Rajczakowska, Magdalena. "Self-Healing Concrete." Licentiate thesis, Luleå tekniska universitet, Byggkonstruktion och brand, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-76527.

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Concrete is a brittle material prone to cracking due to its low tensile strength. Crack repairs are not only expensive and time-consuming but also increase the carbon footprint. Designing a novel concrete material possessing the ability to self-repair cracks would enhance its sustainability. Self-healing can be defined as a material’s ability to repair inner damage without any external intervention. In the case of concrete, the process can be autogenous, based on an optimized mix composition, or autonomous, when additional capsules containing some healing agent and/or bacteria spores are incor

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12

Wiberg, Anders. "Strengthening of concrete beams using cementitious carbon fibre composites." Doctoral thesis, KTH, Civil and Architectural Engineering, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3582.

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<p>The research described in this thesis deals with the use ofcement-based carbon fibre reinforced composites forstrengthening of existing structural concrete.</p><p>There is a large world-wide need for simple and reliablemethods to repair and strengthen aging infrastructure andbuildings. The use of cementitious fi- bre composites offersseveral advantages over the existing methods. No other work onstrengthening of structural concrete with cementitiouscomposites reinforced with continuous high strength fibres wasidentified when the present work started in 1998. At presenttime, 2003, it still is

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13

Dry, Carolyn. "Design of systems for time delayed activated internal release of chemicals in concrete from porous fibers, aggregates of prills, to improve durability /." This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-05222007-091330/.

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14

Gendy, S. S. F. M. "Explicit second-order mixed formulation of reinforced concrete structures under impact loading." Thesis, City, University of London, 2018. http://openaccess.city.ac.uk/19116/.

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Most available research on analysis of reinforced concrete structures under impact loads focuses on using continuum models such as membrane and solid elements, which renders the problem expensive in terms of computational effort. Therefore, a gap exists in the available literature, as no simple finite element has sufficient capabilities to deal with impact and shock problems while considering detailed local parameters. Meanwhile, the objective of this research is to develop several non-linear planar finite element models capable of accurately predicting the response of reinforced concrete stru

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15

Saevarsdottir, Thorbjoerg. "The structural, serviceability and durability performance of variable density concrete panels." Thesis, University of Canterbury. Civil Engineering, 2008. http://hdl.handle.net/10092/1237.

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Conventional concrete is a poor insulating material but has good thermal mass, while lightweight concrete provides good insulation at the price of thermal mass. Precast concrete wall systems have not been widely used in residential homes due to poor thermal and acoustic performance, despite being high quality products that are easy to construct. The variable density concrete panel was designed to combine good thermal storage, insulation and high quality precast concrete. It is produced from a single concrete mix which is vibrated to get a lightweight top layer and a normal/heavyweight bottom l

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16

Nilsson, Isak, and Leonard Sandström. "Behavior prediction of concrete dams." Thesis, KTH, Betongbyggnad, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-289385.

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As many dams were built around 1950, the expected life span of these dams are about tobe reached. With this, the need for monitoring and increased understanding of the damsstructural integrity increases. In order to prevent failures, two warning signals are defined;alert and alarm. The main difference being that the first indicates an unexpected changein behavior that needs to be addressed and evaluated in the near future, while the otherrequires that immediate action must be taken to ensure the safety of the dam.This report aims to evaluate the applicability of different models for designing

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Cauthen, Stephen Michael. "Vacuum assisted resin transfer molding in the repair of reinforced concrete bridge structures." Birmingham, Ala. : University of Alabama at Birmingham, 2008. https://www.mhsl.uab.edu/dt/2008m/cauthen.pdf.

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18

Fahy, Caroline. "A discrete transport-mechanical approach for modelling the durability of concrete." Thesis, University of Glasgow, 2014. http://theses.gla.ac.uk/5761/.

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Reinforced concrete is one of the most commonly used structural materials in the world and is used for buildings and many different types of civil engineering structures, such as bridges, tunnels and airports. The majority of these structures are required to remain in service for at least 50 years while some are expected to last well over 100 years. Fracture of these structures leads to an increase in the permeability of the concrete which in turn can result in increased ingress of water and other aggressive agents, such as chlorides or carbon dioxide, that accelerate the deterioration of thes

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Denton, Stephen Richard. "The strength of reinforced concrete slabs and the implications of limited ductility." Thesis, University of Cambridge, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274164.

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20

Hall, Robin. "Impact sound insulation of flooring systems with polyurethane foam on concrete floors." Thesis, Sheffield Hallam University, 1999. http://shura.shu.ac.uk/3135/.

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The problem of unwanted noise in buildings has grown continuously over the last twenty years and impact noise through separating floors has been identified as a particularly important problem. One accepted method for improving impact sound insulation is to use floating floors in which the walking surfaces are isolated from the supporting structure by a resilient layer. Traditionally the resilient layers comprise mineral or glass fibre quilts but other materials such as flooring grade polystyrene are increasingly used. Recently, shallow profile floating floors comprising flexible open cell poly

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Loijos, Alex (Alexander Nikos). "Life cycle assessment of concrete pavements : impacts and opportunities." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/65431.

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Thesis (S.M. in Technology and Policy)--Massachusetts Institute of Technology, Engineering Systems Division, Technology and Policy Program, 2011.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student submitted PDF version of thesis.<br>Includes bibliographical references (p. 118-121).<br>The concrete pavement network in the United States plays a crucial role in the economy by enabling the transport of people and goods, but it also leads to resource consumption and environme

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Niven, Robert A. J. "Physiochemical investigation of CO₂ accelerated concrete curing as a greenhouse gas mitigation technology." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=99193.

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There is an emerging demand for natural and engineered CO2 sinks to combat the effects of global warming. Carbon capture and storage (CCS) processes are expected to play a predominant role within a broad portfolio of technical innovations to mitigate greenhouse gas (GHG) emissions. A range of CCS methods will be required to provide GHG control technologies for the broad scope of industrial sectors. Within this class of technologies carbon dioxide accelerated concrete curing has the global potential to permanently and safely sequester up to 550 Mt CO2/yr while producing non-reinforced concrete

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23

Hussin, Manal Kamil. "Identification of prestress force in prestressed concrete box girder bridges using ultrasonic technology." Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/117669/8/Manal_Hussin_Thesis.pdf.

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This research was aimed to develop an ultrasonic technology to identify the prestressing force in new and exciting prestressed concrete box girder bridges. The research study included finite element analysis and laboratory testing of a scaled down prestressed concrete box-girder bridge model. New approaches for ultrasonic testing and prestressed force identification were developed and tested successfully.

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Malek, Amir Masoud 1959. "Analytical study of reinforced concrete beams strengthened with fiber reinforced plastic plates (fabrics)." Diss., The University of Arizona, 1997. http://hdl.handle.net/10150/282316.

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Epoxy-bonding a composite plate to tension face, is an effective technique for repair and retrofit of reinforced concrete beams. Experiments have indicated local failure of the concrete layer between the plate and longitudinal reinforcement in retrofitted beams. This mode of failure is caused by local stress concentrations at the plate end, as well as at the flexural cracks. A method has been presented for calculating shear and normal stress concentrations at the cut-off point of the plate. Stress concentrations predicted by this method have been compared to both finite element method and expe

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El-Nemr, Amr Maher. "Serviceability of concrete members reinforced with FRP bars." Thèse, Université de Sherbrooke, 2013. http://hdl.handle.net/11143/6124.

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La détérioration des infrastructures au Canada due à la corrosion des armatures est l'un des défis majeurs de l'industrie de la construction. Les progrès récents dans la technologie des polymères ont conduit au développement d'une nouvelle génération de barres d'armature à base de fibres renforcées de polymères (PRF), (en particulier les fibres de verre). Ces barres, résistant à la corrosion, ont montré un grand potentiel d'utilisation pour mieux protéger les infrastructures en béton armé contre les effets dévastateurs de la corrosion. Avec la publication du nouveau code S807-10 "Spécification

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Lewis, Zachary Ludon. "Evaluation of thermal variations on concrete pavement using three dimensional line laser imaging technology." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50406.

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Jointed Plain Concrete Pavements (JPCP) are some the most popular forms of concrete pavement that are used in the state of Georgia. Each year the Georgia Department of Transportation (GDOT) inspects and surveys their highways to determine what condition the pavement is in and if any rehabilitation is required to maintain the integrity of the highway. These annual surveys include the JPCP and the key concrete pavement characteristics that are used to determine the condition of the JPCP are the faulting at the joints and the roughness of the section. Since it is well known that concrete will

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Alzuhairi, Fatin, and abdulfata Fatah. "Environmentally improved concrete is compared with ordinary concrete with respect to estimated environmental impact." Thesis, KTH, Byggteknik och design, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-296542.

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Swedish buildings account for a large part of Sweden's greenhouse gas emissions, which is why the construction industry within the framework of the concrete initiative has produced a Roadmap for Climate Neutral Concrete. The climate neutral targets meant that Sweden will have net carbon emissions of carbon dioxide in the atmosphere by 2045. In order to achieve the national environmental goals, it is important to reduce the climate impact from concrete construction. Today, the concrete industry is facing a major challenge in minimizing the consumption of concrete, while at the same time the nee

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DALLA, ROSA LEONARDO. "Structural Health of a concrete tunnel lining under complex in situ loading." Thesis, KTH, Bro- och stålbyggnad, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-255537.

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Supporting structures were designed for a utility tunnel in hard rock which was to be intersectedby some road tunnels. With the intersections involving partial overlapping between the idealcross-sections, a concrete lining and post-tensioned steel cables were added to support theutility tunnel prior to the excavation of the road tunnels. The objectives in this work wereto identify the structural behaviour of the system, assess the present state of the supportingstructures and suggest an effective monitoring strategy. Preliminary information was collectedfrom the original drawings, technical sp

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Dalcin, Jarbas Bressa. "Avaliação do potencial do uso da sílica de casca de arroz obtida através da queima controlada como substituição parcial ao cimento Portland na produção de concretos autoadensáveis." Universidade Federal do Pampa, 2016. http://dspace.unipampa.edu.br:8080/xmlui/handle/riu/787.

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Submitted by Cátia Araújo (catia.araujo@unipampa.edu.br) on 2017-01-26T11:47:11Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Avaliação do potencial do uso da sílica de casca de arroz obtida através da queima controlada como substituição parcial ao cimento Portland na produção de concretos au.pdf: 5610666 bytes, checksum: 59bf1f9b8c485e95150b2a114381adde (MD5)<br>Approved for entry into archive by Cátia Araújo (catia.araujo@unipampa.edu.br) on 2017-01-26T11:47:27Z (GMT) No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc5652

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CAVALCANTI, Alan Barbosa. "SOFTPAVE: estudo e desenvolvimento de uma ferramenta para o auxílio à dosagem de misturas asfálticas pelo método SUPERPAVE." Universidade Federal de Campina Grande, 2013. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/1296.

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Submitted by Maria Medeiros (maria.dilva1@ufcg.edu.br) on 2018-07-31T12:34:48Z No. of bitstreams: 1 ALAN BARBOSA CAVALCANTI - DISSERTAÇÃO (PPGECA) 2016.pdf: 10125551 bytes, checksum: 099fb54150be5eec5245e1eefd764544 (MD5)<br>Made available in DSpace on 2018-07-31T12:34:48Z (GMT). No. of bitstreams: 1 ALAN BARBOSA CAVALCANTI - DISSERTAÇÃO (PPGECA) 2016.pdf: 10125551 bytes, checksum: 099fb54150be5eec5245e1eefd764544 (MD5) Previous issue date: 2013<br>CNPq<br>A medida que a Tecnologia da Informação (TI) evolui, as organizações acompanham esse crescimento e fazem uso dessa ferramenta integrando-

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Watase, Azusa. "Non-Destructive Evaluation of Concrete Structures Using High Resolution Digital Image and Infrared Thermography Technology." Master's thesis, University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5885.

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As existing bridge structures age, they are susceptible to the effects of deterioration, damage and other deleterious processes. These effects hamper the capacity and efficiency of transportation networks and adversely impact local, regional and national economic growth. As a result, bridge authorities and other professionals have become more sensitive to maintenance issues related to this aging infrastructure. While highway bridge condition have been monitored by visual inspection, non-destructive evaluation (NDE) technologies have also been developing and they are expected to be utilized for

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Dry, Carolyn Minnetta. "Design of systems for time delayed activated internal release of chemicals in concrete from porous fibers, aggregates of prills, to improve durability." Diss., Virginia Tech, 1991. http://hdl.handle.net/10919/37870.

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Incorporation of chemicals into the internal matrix of cement or concrete, with later release occurring upon stimulation, alters the matrix parameters from those at the initial set. Permeability is reduced, for example, and therefore durability enhanced. The advantages of these designs would be the ability to reduce maintenance and repair costs in the initial building configuration and to delay the time of eventual repair. The components and the structure could take greater environmental abuse also. Permeability is significantly reduced by release of a polymer from wax-coated porous fibers

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Awn, Rim Fares, and Jaqueline Corona. "Hur mogen är marknaden för klimatsmart betong och dess aktörer?" Thesis, Högskolan i Gävle, Energisystem och byggnadsteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-33390.

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Carbon dioxide emissions have long proven to be one of the greenhouse gases that affect our planet's climate and environment. With the upcoming EU targets and Sweden's own net zero targets, the construction and real estate sector is required to work with climate-smart materials to construct the buildings of the future. The net zero target for year 2045 requires a joint pool of power from all companies to find innovative solutions to reduce carbon dioxide emissions. The purpose of this study was to investigate how conscious and active the construction and real estate sector is for climate-smart

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Ismail, Eman. "Distribution of stresses and displacements in skewed concrete slabs." Thesis, Linnéuniversitetet, Institutionen för byggteknik (BY), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-66839.

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A 3D nonlinear finite element analysis was developed for simulating the behavior of skewed concrete slabs and to identify the response of the slab with different angles and element sizes. The purpose of this research is helping the engineering and construction industry to utilize the FEM study and results more in different structural applications.Simulations performed in ABAQUS for skewed slabs are also compared to straight and skewed slabs according to the analytical formulation by Timoshenko.The result showed that when the distance increases, the load capacity measured by reaction forces dec

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35

Simsek, Aslihan. "Tectonic Expression Of Concrete As An Architectural Material." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613805/index.pdf.

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This thesis is an inquiry into the position of concrete as an architectural material in architectural production and expression. With increasing use of concrete in architecture not only technical properties but also aesthetical ones of the material came to foreground. Reconsidering concrete as a building material, the thesis aims to find out tectonic possibilities of concrete as an architectural expression tool. The purpose to search for concrete&#039<br>s tectonic potentials is to rescue it from its bad connotations and reveal it as an architectural tool instead of being mere constructional m

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Bengtsson, Pär, and Johan Wallin. "Analysis of a Prefabricated Concrete Skew Angle Slab Bridge." Thesis, Linnéuniversitetet, Institutionen för byggteknik (BY), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-81146.

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Prefabricated concrete elements are widely used in the construction industry today. With advantages such as time savings, increased safety at the construction site and minimized material usage, prefab becomes a major challenger to the traditional on-site casting construction method. However, constructing a bridge in concrete still presents challenges when using prefab as a construction method. Hence, more research in the area is needed. This master thesis has been studying the behavior of a prefabricated skew angle slab and the connection between the slab and wall elements of a bridge. The stu

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Wingårdh, Ludvig. "Construction of prefabricated concrete buildings : A comparative attributional LCA." Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-299525.

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This master thesis investigated the influence of prefabrication rate of buildings on the embodied environmental impacts. Through a comparative attributional LCA four different Swedish buildings were investigated to explore the influence of PR on the environmental impacts in the categories Cumulative Energy Demand, Global Warming Potential, Water Consumption, Fossil Resource Scarcity, and Mineral Resource Scarcity. The reference buildings had prefabricated rates of 14, 26, 38 and 91%. The results indicate that a higher prefabricated rate (PR) can lead to a lower impact in these categories to so

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Liang, Li. "Recycling of concrete waste with wood waste through heating compaction." Thesis, KTH, Betongbyggnad, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-275674.

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Concrete, as primary building material, is widely used in most construction project. For this reason, large amounts of concrete waste were generated from construction and demolition. One way to reuse concrete waste is to use it as backfill material for landfilling and road bases. While the demand for backfill material is decreasing as the basic infrastructure construction gradually completes. Another way to reuse concrete waste is to grind it and use it as aggregate in casting new concrete. However, the reuse as aggregate for casting concrete requires large amount of cement. It is unsustainabl

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Alqahtani, Fahad Khshim. "Production of novel manufactured plastic aggregate and its utilisation in concrete." Thesis, University of Birmingham, 2017. http://etheses.bham.ac.uk//id/eprint/7821/.

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Plastic waste and its low recycling rate make a significant contribution towards the pollution of the environment. Therefore , it is essential that plastic waste is utilised in different applications . One of the applications is its use either as an aggregate or to form aggregate for use in the concrete. New aggregates were developed using plastic waste and by-product or low cost granular materials. These aggregates have a relatively low density and water absorption as compared to conventional aggregates , and were successfully used to produce sustainable or green lightweight concrete. The new

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Hughes, Peter. "An investigation into marine biofouling and its influence on the durability of concrete sea defences." Thesis, University of Central Lancashire, 2014. http://clok.uclan.ac.uk/10636/.

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This research has investigated marine biofouling and its influence on the durability of concrete sea defences using on-site and laboratory-based studies. The study was divided into three main phases namely: the surface analysis of armour concrete, the study of algal colonisation within the matrix and investigations into the presence of a bacterial biofilm within freshly hardened armour concrete. The effectiveness of photocatalytic coatings as a non-toxic anti-fouling strategy and cell attachment to synthetic fibres was also studied. It was found that algal growth quickly developed at the inter

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Kare, Sridhar, and Heera Lomite. "Impact of Construction Material on Environment : (Steel & Concrete)." Thesis, Högskolan i Borås, Institutionen Ingenjörshögskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-19331.

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All around the globe the consumption of raw materials by the construction industries isaccumulating day by day resulting with an depletion of natural resources, increasing the environmental impacts and CO2 emissions all over the surroundings. Today steel and concrete are widely used and are dominating construction materials in construction industry. These two construction materials are different products and have distinct production flow with significantimpact on the environment. The amount of embodied energy and operational energy which is consumed in the process of production, recycling and

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Šlepikas, Paulius. "Handheld concrete cutter. Market research and concept development." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-217990.

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In this Master’s Degree project the topic of handheld deep cutting is analysed. These days in the construction business workers face the challenge of cutting into concrete, brick and other mineralbased materials deeper than 15 cm. Currently there are a few handheld solutions for deep cutting but they have some major limitations, such as low reliability and safety, high price, maintenance and tiresome usage of these machines. In this paper the project is divided into two components – market research and concept development. To build a knowledge base, firstly, current technical platforms for han

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Khouri, Chalouhi Elisa. "Optimal design solutions of concrete bridges considering environmental impact and investment cost." Licentiate thesis, KTH, Skolan för arkitektur och samhällsbyggnad (ABE), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-244866.

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The most used design approach for civil engineering structures is a trial and error procedure; the designer chooses an initial configuration, tests it and changes it until all safety requirements are met with good material utilization. Such a procedure is time consuming and eventually leads to a feasible solution, while several better ones could be found. Indeed, together with safety, environmental impact and investment cost should be decisive factors for the selection of structural solutions. Thus, structural optimization with respect to environmental impact and cost has been the subject of m

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Al-Soudani, Maha. "Diagnosis of reinforced concrete structures in civil engineering by GPR technology : development of alternate methods for precise geometric recognition." Thesis, Toulouse 3, 2017. http://www.theses.fr/2017TOU30090.

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La méconnaissance de la géométrie réelle d'une structure mène à une évaluation incorrecte de son état. Par conséquent, une estimation imprécise de sa capacité portante, sa durabilité, sa stabilité et la nécessité de mettre en place une réparation ou un renforcement. En outre, l'optimisation du temps requis pour le processus de réparation a besoin de bien connaître les différentes parties de la structure à évaluer et également pour éviter les zones critiques telles que les aciers, les câbles, etc., lors de la réparation. Par conséquent, il est nécessaire d'utiliser des techniques d'évaluation n

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Alnuaimi, Ali Said Mohammed. "Direct design of reinforced and partially prestressed concrete beams for combined torsion, bending and shear." Thesis, Connect to e-thesis, 1999. http://theses.gla.ac.uk/652/.

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Omar, Wahid. "The shear assessment of concrete beams with a honeycombed zone present in the high shear region." Thesis, University of Birmingham, 1998. http://etheses.bham.ac.uk//id/eprint/4551/.

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A honeycombed zone in a concrete structure is among the forms of defects that can be found in concrete structures. In this study, the effects on the shear capacity of a concrete beam are investigated when a honeycombed zone is present in the high shear region. The honeycombed concrete was simulated using an uncompacted no-fines concrete mix. Tests were carried out on rectangular beams with a honeycombed zone introduced at various locations within the high shear region of the beam. The honeycombed zone was square with the size of about a third of the effective depth of the beam. Two strengths o

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Enckell, Merit. "Structural health monitoring using modern sensor technology : long-term monitoring of the New Årsta Railway Bridge." Licentiate thesis, KTH, Civil and Architectural Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4236.

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<p>Structural Health Monitoring (SHM) is a helpful tool for engineers in order to control and verify the structural behaviour. SHM also guides the engineers and owners of structures in decision making concerning the maintenance, economy and safety of structures. Sweden has not a very sever tradition in monitoring, as countries with strong seismic and/or aerodynamic activities. Anyway, several large scale monitoring projects have taken place in recent years and SHM is slowly making entrance as an essential implement in managing structures by engineers as well as owners.</p><p>This licentiate th

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Labib, Wafa Abdelmajeed. "An experimental study and finite analysis of punching shear failure in steel fibre-reinforced concrete ground-suspended floor slabs." Thesis, Liverpool John Moores University, 2008. http://researchonline.ljmu.ac.uk/5893/.

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The present research is concerned with investigating the structural effect of using steel fibre-reinforcement on the punching shear behaviour of ground-suspended slabs with internal columns. The main objectives of this research were to develop a constitutive model for steel fibre-reinforcement (SFRC), to study experimentally the punching shear behaviour of SFRC with no longitudinal reinforcement and to develop a finite element model that can accurately predict the behaviour of SFRC slabs subjected to punching shear. In this respect, a literature review of the work undertaken by previous resear

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AVENDAÑO, JUAN CAMILO. "Identification and quantification of concrete cracks using image analysis and machine learning." Thesis, KTH, Bro- och stålbyggnad, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-286025.

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Nowadays inspections of civil engineering structures are performed manually at close range to be able to assess damages. This requires specialized equipment that tends to be expensive and to produce closure of the bridge. Furthermore, manual inspections are time-consuming and can often be a source or risk for the inspectors. Moreover, manual inspections are subjective and highly dependent on the state of mind of the inspector which reduces the accuracy of this kind of inspections. Image-based inspections using cameras or unmanned aerial vehicles (UAV) combined with image processing have been u

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Yen, Chin-lu, and 顏淇祿. "Ready-mix Plant Concrete Quality Control Technology." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/52141310843521452594.

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碩士<br>國立臺灣科技大學<br>營建工程系<br>101<br>In view of the good and bad quality of concrete, reinforced concrete structures seriously affect safety, and even endanger the lives of the people, so quality control of concrete work or even important. But the current construction site inspection and quality control practices, mostly depends on field sampling produced cylindrical specimens at 28 days of age compressive strength, as the basis for quality control assessment, can not fully reflect the existing site management of construction projects and the actual situation quality control to meet the timelines

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