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Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Branch, James. "Plastic properties of fresh high strength concrete." Thesis, University of Surrey, 2001. http://epubs.surrey.ac.uk/842953/.

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This thesis describes the novel test techniques that were developed to measure the parameters associated with the plastic shrinkage, and subsequent possible plastic shrinkage cracking, of high strength concrete. The parameters measured during the first 24 hours after placing were the stress- strain relationship, negative pore pressure and free shrinkage strain development. The plastic behaviour of eight high strength concrete mixes was quantified and these mixes were then tested to assess their propensity towards plastic shrinkage cracking, using restrained ring tests. A review of the paramete

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Byars, Ewan Alexander. "PFA concrete : strength development and permeation properties." Thesis, University of Dundee, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343527.

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Logan, Andrew Thomas. "Short-Term Material Properties of High-Strength Concrete." NCSU, 2005. http://www.lib.ncsu.edu/theses/available/etd-07252005-220433/.

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The need to extend the applicability of the AASHTO LRFD Bridge Design Specifications to high-strength concrete is being addressed by a series of projects being sponsored by the National Cooperative Highway Research Program (NCHRP). Among these projects, NCHRP Project 12-64 is being carried out at North Carolina State University (NCSU) to expand the use of the design specifications to 18,000 psi (124 MPa) for reinforced and prestressed concrete members in flexure and compression. As a part of this project, specimens were tested to determine the material properties of three high-strength concret

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4

Pemberton, Helen Clare. "Strength properties and fracture behaviour of polymer concrete." Thesis, University of Cambridge, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624378.

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5

Ahmed, El-Mahadi. "Rheological properties, loss of workability and strength development of high-strength concrete." Thesis, University College London (University of London), 2002. http://discovery.ucl.ac.uk/1317867/.

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The successful production of high-strength concrete which meets the desired strength and durability is dependent on optimising its rheological (or flow) properties and reducing its loss of workability during the transportation, placing and compaction stages. The research presented in this thesis aimed to: 1. Determine whether mix stability and compactability can be adequately described by the two Bingham parameters of yield value and plastic viscosity. 2. Reduce the uncertainties in material selection with regards to the performance of superplasticizers and cement replacement materials. 3. Exa

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Wong, Kong-yeung. "Development of high strength concrete for Hong Kong and investigation of their mechanical properties /." Hong Kong : University of Hong Kong, 1996. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19667711.

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Mohammed, Hafeez. "Mechanical Properties Of Ultra High Strength Fiber Reinforced Concrete." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1431021338.

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Karam, Jeffrey Ramzi. "Influence of constituents' properties on the fracture properties of high strength concrete." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/44478.

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Buchberg, Brandon S. "Investigation of mix design and properties of high-strength/high-performance lightweight concrete." Thesis, Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/23394.

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Claisse, Peter Arnold. "The properties and performance of high strength silica fume concrete." Thesis, University of Leeds, 1988. http://etheses.whiterose.ac.uk/3256/.

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Silicafume (SF) has been used as a partial replacement for cement in concrete and experiments have been carried out to measure the durability of the mixes. The SF mixes were made with 20% SF replacement of cement and waterlcement (wlc) ratios of 0.3 and 0.46. Three different curing conditions were used to simulate different site conditions and tests were carried out at 3,28 and 90 days after casting. The following properties were measuredfor the two SF mixes and the two control (OPC) mixes for each of the ages and curing conditions: corrosion rate of embedded steel by linear polarisation, elec

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11

Adwan, Osama K. "Engineering properties and structural behaviour of high strength reinforced concrete beams." Thesis, University of Abertay Dundee, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360744.

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Mondo, Eleonora. "Shear Capacity of Steel Fibre Reinforced Concrete Beams without Conventional Shear Reinforcement." Thesis, KTH, Bro- och stålbyggnad, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-41016.

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While the increase in shear strength of Steel Fibre Reinforced Concrete (SFRC) is well recognized, it has yet to be found common application of this material in building structures and there is no existing national standard that treats SFRC in a systematic manner. The aim of the diploma work is to investigate the shear strength of fibre reinforced concrete beams and the available test data and analyse the latter against the mostpromising equations available in the literature. The equations investigated are:Narayanan and Darwish’s formula, the German, the RILEM and the Italian guidelines. Thirt

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13

Li, Guang. "The effect of moisture content on the tensile strength properties of concrete." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0004782.

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14

Sheikh, Vassiem. "Fresh properties, temperature rise and strength development of high strength concrete with binary and tertiary blended cements." Thesis, University College London (University of London), 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.395651.

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The use of high strength concrete in the construction industry has become more frequent as both the knowledge of the behaviour of the material and the confidence in its production have increased. An appropriate formulation of materials and mix proportions can result in significantly enhanced performance such as high early strength, reduced heat of hydration and increased durability. As a step towards obtaining optimum performance, an investigation has been carried out on the fresh properties (workability), temperature rise during hydration and strength development. This research was aimed at u

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15

Tazaly, Zeinab. "Punching Shear Capacity of Fibre Reinforced Concrete Slabs with Conventional Reinforcement : Computational analysis of punching models." Thesis, KTH, Bro- och stålbyggnad, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-118825.

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Steel fibre reinforced concrete is not a novel concept, it has been around since the mid-1900s, but despite its great success in shotcrete-reinforced rock walls and industrial floors it has not made any impact on either beams or elevated slab. Apparently, the absence of standards is the main reason. However, the combination of steel fibre reinforced concrete and conventional reinforcement has in many researches shown to emphasize good bearing capacrty. In this thesis, two punching shear capacity models have been analysed and adapted on 136 test slabs perfomred by previous researchers. The firs

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16

Annam, Ramyasree. "Study of Mechanical Properties of PVA Fiber-Reinforced Concrete With Raman Spectroscopic Analysis." TopSCHOLAR®, 2015. http://digitalcommons.wku.edu/theses/1460.

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The brittleness of concrete has always been a safety and economic issue of great concern. The low tensile strength of concrete is the cause of its intrinsic brittle nature. This is critical considering the amount of concrete used for the construction of highways, buildings, and other facilities. The mechanical properties of concrete must be improved to provide upgraded construction. Crack resistant and durable concrete has always been a major goal for engineers. Many approaches have been tried to make concrete a better construction material. Fiber reinforcement is an approach which has been sh

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Chitti, Abhishek. "ASSESS MATERIAL PROPERTIES OF CONCRETE USING COMBINED NDT METHODS." OpenSIUC, 2019. https://opensiuc.lib.siu.edu/theses/2490.

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The aim of this research is to assess the material properties of concrete like modulus of elasticity, compressive strength, and Poisson’s ratio using various nondestructive Testing (NDT) methods like Ultrasonic Pulse Velocity (UPV) and Rebound Hammer (RH). Assessment of material properties of concrete is very important as they are used for structural design process. Various NDT methods are applied to ensure the quality of concrete specimens but they can also be used to find material properties. UPV is a NDT method which is used to test the internal condition of the concrete specimen. RH is a s

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18

Nilsson, Jonas, and Peter Sargenius. "Effect of microfibrillar cellulose on concrete equivalent mortar fresh and hardened properties." Thesis, KTH, Byggvetenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-60485.

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A pilot project in 2010, conducted at CBI, showed the capacity for pulp, micro fibrilars from the forest industry to act as Viscosity Modifying Agent (VMA) in concrete. This project was, however, too limited to find answers for optimal use of this kind of material. The forest industry company Stora Enso wants to find out if their pulp can be used in concrete in order to somehow improve its properties. Two micro fibrilar suspensions have been tested. The tested fibrils are in two sizes, the finer material named MFC1 has undergone more homogenization than the course material named MFC2. The fibr

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19

Roth, Michael Jason 1975. "Flexural and tensile properties of thin, very high-strength, fiber-reinforced concrete panels." Master's thesis, Mississippi State : Mississippi State University, 2007. http://library.msstate.edu/etd/show.asp?etd=etd-11062007-215816.

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20

Eriksson, Viktor. "Design of Ultra High Performance Fibre Reinforced Concrete Bridges : A Comparative Study to Conventional Concrete Bridges." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-75183.

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The use of Ultra High Performance Fibre Reinforced Concrete (UHPFRC) in the construction industry started in the 1990s and has since then been used for bridges all over the world. The mechanical properties and the dense matrix result in lower material usage and superior durability compared to conventional concrete, but the implementation of UHPFRC in the Swedish industry has been delayed. The most evident explanation, based on interview with industry representatives, as to why UHPFRC is not commonly used in Sweden are due to the lack of standards and knowledge. UHPFRC also has a high cement co

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21

Bajaj, Srikanth. "Effect of Corrosion on Physical and Mechanical Properties of Reinforced Concrete." University of Akron / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=akron1353961865.

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Deda, Hugo. "The Influence of the Binder Type & Aggregate Nature on the Electrical Resistivity and Compressive Strength of Conventional Concrete." Thesis, Université d'Ottawa / University of Ottawa, 2020. http://hdl.handle.net/10393/41463.

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Concrete has been used in a number of civil engineering applications due to its interesting fresh, hardened, and durability-related properties. 28-day compressive strength is the most important hardened state property and is frequently used as an indicator of the material’s quality. However, early-age mechanical properties are a key factor nowadays to enhance construction planning. Several advanced techniques have been proposed to appraise concrete microstructure and quality, and among those electrical resistivity (ER) is one of the most commonly used since it is a non-destructive and low-cost

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23

Kim, Byoungil. "Effect of fiber types on the mechanical properties and permeability of high strength concrete." [Gainesville, Fla.] : University of Florida, 2006. http://purl.fcla.edu/fcla/etd/UFE0015827.

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Wong, Kong-yeung, and 黃剛揚. "Development of high strength concrete for Hong Kong and investigation of their mechanical properties." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B31213765.

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25

Irvine, Helen. "Characterising the influences of Northern Irish aggregates on the properties of high strength concrete." Thesis, Queen's University Belfast, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249650.

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Dan-Jumbo, F. G. "Material and structural properties of a novel Aer-Tech material." Thesis, Coventry University, 2015. http://curve.coventry.ac.uk/open/items/699ca3a1-deec-4549-b907-0e06bcdad83f/1.

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This study critically investigates the material and structural behaviour of Aer-Tech material. Aer- Tech material is composed of 10% by volume of foam mechanically entrapped in a plastic mortar. The research study showed that the density of the material mix controls all other properties such as fresh state properties, mechanical properties, functional properties and acoustic properties. Appreciably, the research had confirmed that Aer-Tech material despite being classified as a light weight material had given high compressive strength of about 33.91N/mm2. The compressive strength characteristi

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27

Bai, Y. "Influence of furnace bottom ash as fine aggregate on strength and durability properties of concrete." Thesis, Queen's University Belfast, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403184.

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28

Buss, Kirsty. "Ternary combination concretes using GGBS, fly ash & limestone : strength, permeation & durability properties." Thesis, University of Dundee, 2013. https://discovery.dundee.ac.uk/en/studentTheses/0da1012f-5af4-470d-bec1-a9c51df03ab8.

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With the pressure on the construction industry to lower CO2 emissions it has become increasingly important to utilise materials that supplement Portland cement (CEM I) in concrete. These include additions such as ground granulated blast-furnace slag (GGBS) and fly ash, which have found greater use due to the benefits they provide to many properties of the material (in addition to environmental impact). While studies have investigated these materials in binary blends with CEM I, little work has examined the effect of combining materials in ternary blend concretes. A wide-ranging study was, ther

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29

Momeni, Amir Farid. "Effect of concrete properties and prestressing steel indentation types on the development length and flexural capacity of pretensioned concrete members." Diss., Kansas State University, 2016. http://hdl.handle.net/2097/32682.

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Doctor of Philosophy<br>Civil Engineering<br>Robert J. Peterman<br>A study was conducted to determine the effect of different concrete properties and prestressing steel indentation types on development length and flexural capacity of pretensioned members. Wires and strands commonly used in the manufacturing of prestressed concrete railroad ties worldwide were selected for the study. Thirteen different 5.32-mm-diameter prestressing wire types and six different strands (four, seven-wire strands and two, three-wire strands) were used to cast prisms with a square cross section. The ratio of concre

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Hösthagen, Anders. "Thermal Crack Risk Estimation and Material Properties of Young Concrete." Licentiate thesis, Luleå tekniska universitet, Byggkonstruktion och brand, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-65495.

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This thesis presents how to establish a theoretical model to predict risk of thermal cracking in young concrete when cast on ground or an arbitrary construction. The crack risk in young concrete is determined in two steps: 1) calculation of temperature distribution within newly cast concrete and adjacent structure; 2) calculation of stresses caused by thermal and moisture (due to self-desiccation, if drying shrinkage not included) changes in the analyzed structure. If the stress reaches the tensile strength of the young concrete, one or several cracks will occur. The main focus of this work is

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Li, Jieren. "The combined effect of silica fume and fly ash on microstructure and properties of high-strength concrete." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0035/NQ38485.pdf.

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Kothari, Ankit. "Effects of Fly Ash on the properties of Alkali Activated Slag Concrete." Thesis, Luleå tekniska universitet, Geoteknologi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-63534.

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This master thesis presents the effects of fly ash on the properties of alkali activated slag concrete, commonly referred as Geopolymer concrete (GPC). Cement manufacturer are major producers of CO2 which negatively affects the environment. Due to the increased construction activities and environmental concern, it is necessary to introduce alternative and eco-friendly binders for concrete. Slag and fly ash based concrete, which is by-product from industrial waste, is probably the best replacement for OPC concrete due to less or nil environmental issue. Most of the researchers have already conc

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Twagirimana, Emmanuel. "Evaluation of adhesion properties in bitumen-aggregate systems for winter surfacing seals using the bitumen bond strength test." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/95953.

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Thesis (MEng)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: Flexible pavement designers have a choice of two wearing course: either asphalt concrete or surfacing seals. The latter have been widely used by several countries as their preferred wearing course over other methods, especially countries with a limited number of average inhabitants per square kilometre. Moreover, the surfacing seals were identified as an efficient cost effective road preventive maintenance technique. Surfacing seals in New Zealand, South Africa and Australia cover about 65%, 80% and 90% of their surfaced road n

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Akgun, Haluk 1959. "Bond strength of cementitious borehole plugs in welded tuff." Diss., The University of Arizona, 1990. http://hdl.handle.net/10150/185081.

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This study includes a systematic investigation of the bond strength of cementitious borehole plugs in welded tuff. Analytical and numerical analysis of borehole plug-rock stress transfer mechanics is performed. The interface strength and deformation are studied as a function of Young's modulus ratio of plug and rock, plug length and rock cylinder outside-to-inside radius ratio. The tensile stresses in and near an axially loaded plug are analyzed. The frictional interface strength of an axially loaded borehole plug, the effect of axial stress and lateral external stress, and thermal effects are

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Silva, Inês Santana da. "Concreto de alta resistência: composição, propriedades e dimensionamento." Universidade de São Paulo, 1995. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-02052018-093914/.

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Concretos de alta resistência têm sido usados em estruturas, atualmente, em diversas partes do mundo. Entretanto, no Brasil, pouco se conhece sobre seu comportamento. Este trabalho fornece uma visão geral das aplicações, dos materiais empregados na produção, das propriedades mecânicas e do comportamento estrutural dos concretos de alta resistência. Resultados experimentais obtidos por alguns pesquisadores, para pilares com carga axial e para vigas sujeitas a flexão e a cisalhamento, são comparados com valores teóricos, calculados com procedimentos usuais relativos a concretos de resistência us

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36

Hussein, Husam H. "Analysis and Design of Ultra-High-Performance Concrete Shear Key for PrecastPrestressed Concrete Adjacent Box Girder Bridges." Ohio University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1522147809016232.

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Cunha, Michel Gustavo Cardoso. "Viabilidade do uso de RCD proveniente da geração dos concretos convencional e de alta resistência através da utilização do jigue como agente do beneficiamento." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/178221.

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O presente trabalho avaliou a viabilidade do uso de Resíduos de Construção e Demolição (RCD) provenientes da geração de dois traços de concretos distintos. Um Concreto Convencional-CC (traço em massa:1:2,94:3,56; a/c:0,61) utilizando cimento CP IV 32 e outro concreto de Alta Resistência-CAR (traço em massa:1:1,11:2; a/c: 0,22; com adição, aditivo e pó xadrez vermelho) utilizando cimento CP V-ARI. Após 28 dias de cura, 3 corpos de prova de cada traço foram submetidos ao ensaio de resistência a compressão axial apresentando em média para CC 21,02 MPa e para CAR 95,09 MPa. Os materiais de ambos o

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Černá, Hana. "Sledování vlivu složení betonu na odolnost proti abrazi." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392338.

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This diploma thesis focuses on the resistance of concrete to abrasion with regard to the raw materials used for their production. In the theoretical part of the thesis are described admixtures, different types of aggregate and aggregate composition which influence the resistance of concrete to abrasion. In the experimental part, 15 different C30 / 37, S4 concrete formulations were proposed. Different types of aggregates - fecal gravel (Žabčice), biotic granodiorite (Olbramovice) and amphibolite (Želešice) have always been used in the recipes. Fine ground limestone, micro-silica, high-temperatu

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Pédèches, Jean-Michel. "Etude des proprietes mecaniques et du retrait de betons de haute performance." Toulouse 3, 1988. http://www.theses.fr/1988TOU30061.

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Etude des betons avec resistance a la rupture en compression simple entre 30 et 130 mpa a 28 jours, realises par introduction de fumee de silice condensee et de fluidifiant. Dosage optimal de la fumee de silice (autour de 10% du poids du liant); variation des proprietes mecaniques, plus forte pour la resistance a la compression, avec fragilisation. Influence du fluidifiant sur la faible resistance a la compression aux jeunes ages et sur le retrait (moindre retrait avec la fumee de silice qu'avec les betons classiques d'egale resistance, fortement doses en ciment et/ou fluidifiant)

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Homrich, Jefferson Teixeira Olea. "Avaliação do comportamento do cimento supersulfatado em concreto autoadensável." Universidade Tecnológica Federal do Paraná, 2018. http://repositorio.utfpr.edu.br/jspui/handle/1/3230.

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O concreto autoadensável (CAA) tem a capacidade de fluir por obstáculos, preenchendo as fôrmas e resistindo à segregação, entretanto esse concreto apresenta proporção pasta-agregado alta, o que ocasiona um maior desprendimento de calor durante a hidratação do cimento bem como maior suscetibilidade a retração. Os cimentos oriundos da utilização de subprodutos industriais vêm ganhando atenção, devido à preocupação ambiental, sendo um deles o cimento supersulfatado (CSS). O CSS tem como constituintes a escória granulada de alto forno (80-90%), fonte de sulfato de cálcio (10-20%) e um ativador alc

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41

Barbosa, Claudius de Sousa. "Resistência e deformabilidade de blocos vazados de concreto e suas correlações com as propriedades mecânicas do material constituinte." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-09022007-152735/.

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O trabalho tem como objetivo correlacionar as propriedades mecânicas de blocos vazados com as do concreto que o constitui. Moldam-se blocos vazados e corpos-de-prova de dimensões distintas com concreto plástico em três níveis de resistência (10, 20 e 30 MPa) e caracterizam-se as propriedades mecânicas por meio de ensaios à compressão axial e à tração. Ensaiam-se à compressão axial prismas constituídos por dois e três blocos de concreto sem junta de argamassa, unidos por adesivo à base de epóxi. Observa-se que a relação entre as resistências do bloco e prisma e a resistência do concreto diminui

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Serifou, Mamery. "Béton à base de recyclats : influence du type de recyclats et rôle de la formulation." Thesis, Bordeaux 1, 2013. http://www.theses.fr/2013BOR15230/document.

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L‟élimination de certains déchets est un enjeu important en Côte d‟Ivoire. Une des solutions proposée est d‟envisager l‟utilisation de ces déchets comme granulats dans les bétons. Les travaux présentés dans ce document portent sur l‟incorporation de quatre différents déchets.La première étude porte sur un béton confectionné avec trois types de déchets : du verre concassé, du ciment durci concassé et des pneus découpés. Elle a été réalisée en deux phases. Dans la première ces déchets ont été incorporés à du béton pour remplacer 100% des graviers (substitution totale). Dans la seconde une substi

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Lopes, Anne Neiry de Mendonça. "Mitigação da retração autógena em concretos de alta resistência contendo aditivo redutor de retração e seus efeitos na macro e microestrutura." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2011. http://hdl.handle.net/10183/38774.

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O desenvolvimento do concreto de alta resistência - CAR foi um importante avanço na tecnologia de concreto, entretanto, a despeito de suas inúmeras vantagens como material estrutural, o seu emprego tem sido limitado, por ter se revelado mais susceptível à fissuração nas primeiras idades. Isto se deve à ocorrência do fenômeno da retração autógena, particularmente mais intenso nestes concretos que nos de resistência normal, uma vez que no CAR, há significativamente maior quantidade de material cimentício e menor quantidade de água, o que dá origem a uma estrutura porosa muito refinada logo nas p

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Černý, Pavel. "Vývoj vysoce odolného kompozitu s využitím druhotných surovin a taveného čediče." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392366.

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The diploma thesis deals with development of high resistant composite, which brings its properties closer to the melted basalt products. This fact will allow substitution of basalt elements in hostile chemical environment by newly developed material and completes its product line. High resistant composite also consists of secondary raw material in highest possible amount. Material that is being evolved carries high strength, abrasion resistance and is also resistable in hostile chemical environment.

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Vorel, Pavel. "Vlastnosti betonů s přídavkem plazmatem upravených polypropylenových vláken." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-225879.

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Master‘s thesis focuses on concrete combined with polypropylen fibres produced commercially, fibres without surface modifications and fibres modificated by plasma. Most important topic of the thesis is experimental verification of influence of plasma modificated fibres on attributes of fresh concrete and physical-mechanical attributes of solidified concrete. Based on the results of the tests perfomed on examin units compares results and anylyses applicability of different fibre surface modifications.

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Niyigena, César. "Variabilité des performances de bétons de chanvre en fonction des caractéristiques de la chènevotte produite en Auvergne." Thesis, Clermont-Ferrand 2, 2016. http://www.theses.fr/2016CLF22700/document.

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Les origines de la variabilité des propriétés du matériau béton de chanvre sont nombreuses. On distingue celles liées aux propriétés des ses constituants et du matériau lui-même auxquelles il faut ajouter les dispersions qui résultent des méthodes utilisées pour caractériser ce béton. Ce travail de thèse, s’intéresse à l’étude de la variabilité des propriétés du béton de chanvre en tenant compte de ces différentes sources et en particulier au type de chènevotte utilisée. L’étude bibliographique réalisée permet de comprendre le matériau béton de chanvre, notamment ses constituants, les méthodes

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Kallel, Hatem. "Influence de la température et de l'hygrométrie sur le comportement instantané du béton." Thesis, Pau, 2016. http://www.theses.fr/2016PAUU3013/document.

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Les enceintes de confinement sont sollicitées lors d'un accident grave par la modification thermodynamique du milieu interne qui génère une pression pouvant monter jusqu'à 5 bars, une température évaluée au maximum à 180 °C et une humidité relative pouvant aller jusqu'à la saturation. Au-delà de calculs réglementaires, la complexité de la sollicitation nécessite une bonne connaissance du comportement mécanique et thermique des matériaux et en particulier du béton dans la gamme de température et d'hygrométrie imposée afin d’être capable de mener les simulations numériques les plus réalistes pos

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Monteiro, Roberto dos Santos. "Estudo da influencia de diferentes composições de agregados na obtenção e caracterização do concreto autoadensável." Universidade Federal de Alagoas, 2015. http://www.repositorio.ufal.br/handle/riufal/1334.

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In the face of technological advances in concrete science emerged so-called special concretes and, among these, the self-compacting concrete (SCC), developed in Japan in the 1980s. This concrete is currently considered one of the greatest advances in concrete technology in view of its numerous advantages (decrease of construction duration, decrease of concreting labor, improvement of the working environment, improvement of the quality and durability of structures etc.). The production of SCC requires different mix design methods related to those applied for conventional concrete. Among these d

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Escadeillas, Gilles. "Les ciments aux fillers calcaires : contribution a leur optimisation par l'etude des proprietes mecaniques et physiques des betons fillerises." Toulouse 3, 1988. http://www.theses.fr/1988TOU30053.

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Il ressort de l'etude que: les proprietes rheologiques avant prise du liant sont ameliorees par l'ajout de filler, autorisant une diminution de la teneur en eau de gachage; la reactivite de la calcite est confirmee (formation de carboaluminates, diminution de l'aureole de transition); les resistances mecaniques aux jeunes ages sont ameliorees; la fragilite (fissuration. . . ) est attenuee. On envisage l'amelioration de ces procedes par addition d'un superplastifiant

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Behloul, Mouloud. "Analyse et modélisation du comportement d'un matériau à matrice cimentaire fibrée à ultra hautes performances : bétons de poudres réactives, du matériau à la structure." Cachan, Ecole normale supérieure, 1996. http://www.theses.fr/1996DENS0026.

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L'objectif de ce travail est d'étudier le comportement mécanique des bétons de poudres réactives renforces de fibres métalliques (bpr) et de définir des modèles de calcul permettant la prédiction du comportement des structures en bpr. Le comportement du bpr sous différentes sollicitations: compression, traction et flexion est présenté dans un premier temps. Ensuite, la distribution des fibres dans les structures est étudiée et son aspect aléatoire quantifié ; une formulation empirique de sa dispersion est proposée. Cet aspect aléatoire de la distribution des fibres est intégré dans un modèle p

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