Relevant bibliographies by topics / Modulus of elasticity of concrete

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  2. Dissertations / Theses
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Academic literature on the topic 'Modulus of elasticity of concrete'

Author: Grafiati
Published: 4 June 2021
Last updated: 12 February 2022

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Journal articles on the topic "Modulus of elasticity of concrete"

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Křížová, Klára, and Rudolf Hela. "Evaluation of the Modulus of Elasticity of Different Types of Concrete Compared with Eurocode 2." Key Engineering Materials 677 (January 2016): 181–85. http://dx.doi.org/10.4028/www.scientific.net/kem.677.181.

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The comparison of really measured compressive strength static modulus of elasticity with table values stated in Eurocode 2 is essential part of the paper. Since the standard draws from modulus of elasticity - concrete strength class, the set compressive strengths will be classified in concrete particular classes. Experimental part was based on several concrete design compositions differing in particular input raw-materials. Monitored values were set with concretes in different ages with final value 180 days. The experiment tries to demonstrate the impossibility of static modulus of elasticity derivation from table values which do not match the present-date produced concretes.
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Tipka, Martin, and Jitka Vašková. "Modulus of Elasticity in Tension for Concrete and Fibre Reinforced Concrete." Solid State Phenomena 259 (May 2017): 35–40. http://dx.doi.org/10.4028/www.scientific.net/ssp.259.35.

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The paper deals with the determination of the modulus of elasticity in tension for cementitious composites and comparing these values with the values of modulus in compression. It describes several methods, which are usually used for determination of modulus of elasticity of concrete and fibre reinforced concrete. In the experimental program modulus of elasticity in compression and tension of various types of concrete and fibre reinforced concrete were compared. The classic test with prismatic specimens was used for determination of the modulus in compression; a new arrangement of uniaxial tension test of cementitious composites was used for determination of the modulus of elasticity in tension.
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Saud, Abdullah F., Hakim S. Abdelgader, and Ali S. El-Baden. "Compressive and Tensile Strength of Two-Stage Concrete." Advanced Materials Research 893 (February 2014): 585–92. http://dx.doi.org/10.4028/www.scientific.net/amr.893.585.

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An experimental investigation was conducted to evaluate the compressive, tensile strength and modulus of elasticity of two-stage concrete (TSC) at different water-to-cement ratios. The primary objectives were to measure the elastic modulus, compressive strength and splitting tensile strength of TSC and to determine if there is a quantifiable relationship between compressive and tensile strength. Behavior of TSC in compression has been well documented, but there are little published data on its behavior in tension and modulus of elasticity. This paper presents the experimental results of preplaced, crushed granite aggregate concreted with five different mortar mixture proportions. A total of 48 concrete cylinders were tested in unconfined compression modulus of elasticity and splitting tension at 28 and 90 days. It was found that the modulus of elasticity and splitting tensile strength of two-stage concrete is equivalent or higher than that of conventional concrete at the same compressive strength. Splitting tensile strength can be conservatively estimated using the ACI equation for conventional concrete.
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Domagała, Lucyna, and Justyna Dobrowolska. "The influence of an applied standard test method on a measurement of concrete stabilized secant modulus of elasticity." MATEC Web of Conferences 163 (2018): 07001. http://dx.doi.org/10.1051/matecconf/201816307001.

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The paper focuses on the influence of the standard test method applied to determine the concrete stabilized secant modulus on a specified value. The new European Standard EN 12390-13 for testing hardened concrete accepts two methods (A and B) for the determination of the secant modulus of elasticity in compression. The aim of the research was to establish how different testing procedures affect a measured value of modulus of elasticity. Four structural concrete series: two lightweight aggregate concretes and two normal-weight ones were subject to tests of moduli of elasticity determined by both standard methods, as well as compressive strength and density. The carried out tests revealed that the procedure of testing modulus of elasticity influenced a measured value. Method A led to higher values of modulus in relation to Method B, irrespective of concrete density and strength. Nevertheless, a certain relationship between the concrete structure homogeneity and the difference in results of moduli determined by both methods may be observed.
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Ťažký, Martin, Lucia Osuská, and Rudolf Hela. "Development of the HVFAC Modulus of Elasticity." Solid State Phenomena 296 (August 2019): 155–60. http://dx.doi.org/10.4028/www.scientific.net/ssp.296.155.

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Concretes with high fly ash content are within a unified world nomenclature often referred to as HVFAC, resp. high volume fly ash concrete. These concretes are characterized by the percentage of fly ash as an active admixture relative to a cement dose of at least in a ratio of 1:1. The use of these concretes falls into the field of construction with the necessary reduction in the development of hydration heat. In the experiment, long-term monitoring of the development of important mechanical parameters, namely the static modulus of compressive elasticity and compressive strength, was performed. Both monitored parameters play a very important role in the design of buildings, for which construction is HVFAC often used. These parameters were monitored within the carried out research until the time of 360 days. The results of the experiment give an overview of the pozzolanic reaction progress over the in the long-term time horizon and its impact on the concrete parameters monitored. The results clearly show that even after 360 days the development of the strength parameters of these concretes is not stopped.
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Reiterman, Pavel. "Static Modulus of Elasticity of Concrete." Materials Science Forum 824 (July 2015): 151–54. http://dx.doi.org/10.4028/www.scientific.net/msf.824.151.

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Present paper deals with the experimental investigation of static modulus of elasticity of hardened concrete and its relation to compressive strength of concrete. Based on the number of measurement was derived expression of dependence of modulus of elasticity on compressive strength of concrete which was determined using cubic specimens; modulus of elasticity was measured using prismatic specimens of dimensions 100x100x400 mm. Studied concrete mixtures present commonly used concrete of all established strength classes.
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Tampi, R., H. Parung, R. Djamaluddin, and A. Amiruddin. "Elasticity modulus concrete of abaca fiber." IOP Conference Series: Earth and Environmental Science 473 (May 14, 2020): 012146. http://dx.doi.org/10.1088/1755-1315/473/1/012146.

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Jacintho, Ana Elisabete Paganelli Guimarães de Avila, Ivanny Soares Gomes Cavaliere, Lia Lorena Pimentel, and Nádia Cazarim Silva Forti. "Modulus and Strength of Concretes with Alternative Materials." Materials 13, no. 19 (October 1, 2020): 4378. http://dx.doi.org/10.3390/ma13194378.

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This paper presents a study with concretes produced with natural aggregates, recycled concrete aggregates (RCA) and waste porcelain aggregates (WPA). The study analyzed the influence of recycled aggregates in the mechanical properties of conventional concretes and evaluated the difference between measured and predicted values of elasticity modulus. The incorporation of WPA in concrete showed better mechanical results compared to the concretes produced with RCA. Measured elasticity moduli were lower than moduli predicted by NBR 6118:2014 and fib Model Code 2010, while measured results were greater than values predicted by Eurocode 2:2004 and ACI 318:2014, as expected, which indicated the safety of the latter two standards.
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Mailyan, D. R., and G. V. Nesvetaev. "RIGIDITY AND STRENGTH ANALYSIS OF REINFORCED CONCRETE BEAMS BY VARYING ELASTICITY MODULUS." Vestnik Tomskogo gosudarstvennogo arkhitekturno-stroitel'nogo universiteta. JOURNAL of Construction and Architecture, no. 4 (August 29, 2018): 86–93. http://dx.doi.org/10.31675/1607-1859-2018-20-4-86-93.

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Relevance: The actual values of the elastic modulus used for manufacturing reinforced concrete products and concrete structures may differ significantly from those given in SNiP 63.13330. It is therefore interesting to estimate the rational value of the elasticity modulus of concrete for a particular design. Purpose: Calculation algorithm is proposed for normal stresses and deformations based on variation of the elasticity modulus of concrete by controlling prescribed and technological factors. Materials and methods: Ordinary concrete grades up to В120 grade with organic and mineral modifiers, reinforced concrete beams, modeling, numerical experiment, beam analysis by normal stresses and deformations. Results: The proposed beam analysis algorithm considers a possible change up to 2 times in the elasticity modulus of concrete. Conclusions: Calculations of the elasticity modulus ensure the beam rigidity, taking into account its reinforcement and cross-sectional parameters and strength for normal stresses at a concrete strength normalization corresponding to the elastic modulus, with regard to prescribed and technological factors.
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SANTOS, A. H. A., R. L. S. PITANGUEIRA, G. O. RIBEIRO, and E. V. M. CARRASCO. "Concrete modulus of elasticity assessment using digital image correlation." Revista IBRACON de Estruturas e Materiais 9, no. 4 (August 2016): 587–94. http://dx.doi.org/10.1590/s1983-41952016000400007.

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Abstract This paper presents the use of the technique of digital image correlation for obtaining the elasticity modulus of concrete. The proposed system uses a USB microscope that captures images at a rate of five frames per second. The stored data are correlated with the applied loads, and a stress-strain curve is generated to determine the concrete compressive modulus of elasticity. Two different concretes were produced and tested using the proposed system. The results were compared with the results obtained using a traditional strain gauge. It was observed a difference in the range of 4% between the two methods, wherein this difference depends on some parameters in the case of the DIC results, as focal length and a video capture resolution, indicating that DIC technique can be used to obtain mechanical properties of concrete.
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Dissertations / Theses on the topic "Modulus of elasticity of concrete"

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Bhattacharjee, Chandan. "Bayesian prediction of modulus of elasticity of self consolidated concrete." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-2467.

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Schoppe, Brett Michael. "SHRINKAGE & MODULUS OF ELASTICITY IN CONCRETE WITH RECYCLED AGGREGATES." DigitalCommons@CalPoly, 2011. https://digitalcommons.calpoly.edu/theses/500.

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This paper presents results on experimental research for concrete produced using recycled coarse aggregates (RCA). Five types of coarse aggregates were used in this study, four of which were RCA. The main purpose of this research was to examine how different types and properties of coarse aggregate affected compressive strength, modulus of elasticity, and shrinkage in concrete when natural coarse aggregates were replaced with RCA. Concrete batches were made with water-cement (w/c) ratios of 0.30, 0.45, and 0.60, and substitution percentages ranged from 0% to 100% of natural aggregate with RCA. Test results clearly show that compressive strength, modulus of elasticity, and shrinkage greatly depend on the quality and type of coarse aggregate used. In addition to testing of hardened concrete, predictive models for elasticity and ultimate shrinkage were developed to formulate and reinforce proposed conclusions about the properties and performance for the different RCA.
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Axson, Daniel Peter. "Ultimate Bearing Strength of Post-tensioned Local Anchorage Zones in Lightweight Concrete." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/33711.

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Currently, NCHRP Report 356 has published an equation to estimate the ultimate strength of the local zone in normal weight concrete. The local zone is the area of concrete directly ahead of the bearing plate. The equation can be broken into two distinct parts: unconfined bearing strength of concrete enhanced by the A/Ab ratio and the enhancement of strength due to the presence of confining. Research has shown that the strength enhancement of the A/Ab ratio and confining reinforcing is less in lightweight concrete than in normal weight concrete. To determine the strength of the local zone in lightweight concrete 30 reinforced prisms, 2 unreinforced prisms, and concrete cylinders were tested. The dimensions of the prisms were 8 in. x 8 in. x 16 in. and the cylinders were 4 in. x 8 in. cylinders. The simulated reinforcing in the prisms extended only through the top 8 in. of the prism and consisted of either ties or spirals with different spacing or pitch, respectively. To determine the effect of the A/Ab ratio for each spacing or pitch arrangement of the reinforcing, one of two different size bearing plates were used. From the testing performed in this research and other research, it is apparent that the NCHRP equation is unconservative when estimating the ultimate strength of the local zone in lightweight concrete. By modifying both parts of the NCHRP equation it is possible to conservatively predict the ultimate strength of the local zone in lightweight concrete. Also investigated in this thesis are equations to predict the splitting cylinder strength and modulus of elasticity of lightweight concrete. For a sand-lightweight concrete, as defined by ACI 318-05 Building code and Commentary, the splitting tensile strength can be accurately predicted by multiplying the square root of the compressive strength by 5.7.
Master of Science
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Potočková, Michaela. "Vliv vícenásobného cyklického zatěžování na hodnotu statického modulu pružnosti betonu v tlaku v konstrukcích." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240134.

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This thesis deals with the dependence of static modulus of elasticity of concrete in compression on number of load cycles. The deformation of test specimens during multiple cyclic loading was measured with resistive strain gages. Up to 1600 load cycles was conducted. Static modulus of elasticity in compression was determined from measured deformations. The aim of this thesis is assessment changes in the values of static modulus of elasticity depending on the number of load cycles.
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Gujel, Daniele Artini. "Avaliação do comportamento elástico de concretos produzidos com substituição parcial dos agregados graúdos naturais por reciclados de concreto a partir de ensaios Estático e Dinâmico." Universidade do Vale do Rio dos Sinos, 2014. http://www.repositorio.jesuita.org.br/handle/UNISINOS/4352.

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Submitted by Fabricia Fialho Reginato (fabriciar) on 2015-07-08T22:34:01Z No. of bitstreams: 1 DanieleGugel.pdf: 2874038 bytes, checksum: 4386cae5306c5137fce5e8448d48f6fa (MD5)
Made available in DSpace on 2015-07-08T22:34:01Z (GMT). No. of bitstreams: 1 DanieleGugel.pdf: 2874038 bytes, checksum: 4386cae5306c5137fce5e8448d48f6fa (MD5) Previous issue date: 2014-04-02
CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
FINEP - Financiadora de Estudos e Projetos
A construção civil é um setor que causa elevado impacto ambiental devido à geração de resíduos e ao elevado consumo de matérias-primas. Demandas cada vez maiores por áreas a serem destinadas a aterros, aliadas à escassez de recursos naturais, favorecem a utilização de resíduos de construção e demolição como fonte para agregados. Neste contexto, muitos estudos estão sendo feitos a respeito de concretos produzidos com resíduos de construção e demolição, focados principalmente nas propriedades mecânicas de resistência à tração e à compressão. Para aplicação como material estrutural, entretanto, a relação tensão x deformação e, particularmente, o Módulo de Elasticidade são importantes parâmetros a serem analisados, pois são diretamente relacionados com o projeto de estruturas. Frente ao exposto, o presente trabalho utilizou agregado graúdo reciclado de concreto (ARC) na confecção de novos concretos e teve como objetivo analisar o comportamento elástico dos mesmos. Para tanto, foram confeccionados concretos com 0% e 50% de substituição de agregados graúdos naturais (AGN) por ARC. O comportamento elástico foi determinado através de um método destrutivo (Estático) e através de um método não destrutivo (Dinâmico) nas idades de 7, 28 e 63 dias para os níveis de carregamento de 0 (somente Dinâmico), 20, 30, 40, 50, 60, 70 e 80% da resistência do concreto. Os resultados encontrados para o Módulo de Elasticidade foram comparados com estimativas a partir de métodos empíricos previstos nas normas CEB-FIP Model Code 1990, ACI 318 (2011) e NBR 6118 (ABNT, 2007 e 2014). Com isso, visou-se observar a influência do ARC nas propriedades elásticas do concreto, comparar o comportamento elástico dos concretos de referência aos resultados dos concretos com ARC, estudar a correlação entre os dois métodos experimentais (Dinâmico e Estático) e verificar a correspondência entre os resultados experimentais obtidos com os normativos. Como principais conclusões, pôde-se verificar que os concretos com ARC apresentam limite elástico similar aos concretos que utilizam somente AGN (este limite situa-se entre 40 e 50% da ƒc); não foi possível identificar uma relação única entre os valores de módulo obtidos pelo Método Dinâmico e pelo Método Estático para ambos os concretos; não é possível afirmar que concretos de resistências similares, mas idades diferentes apresentaram módulos diferentes; os concretos com e sem ARC estudados apresentaram valores de Módulo de Elasticidade obtidos pelo método Estático bastante inferiores aos previstos pelas normas estudadas; os valores de Módulo de Elasticidade obtidos pelo método Dinâmico, para concretos com e sem ARC, estão contidos na faixa entre a norma mais conservadora e a menos conservadora e as curvas obtidas mostram que os concretos com ARC têm comportamento similar aos concretos sem ARC, mas são menos rígidos (maiores deformações para as mesmas tensões).
The construction industry causes a great environmental impact due to the generation of waste and the high consumption of raw material. Increasing demands for areas to become landfills, as well as shortages of natural resources, have favored the use of construction and demolition waste as a source of aggregate. In this context, many studies have been made regarding concretes produced with the use of demolition and construction waste; mainly focused on the mechanical properties of tensile and compressive strength. However, in order to use concretes produced with waste as a structural material, the stress-strain behavior and, particularly, the elastic modulus are important parameters to be analyzed, once they are directly related to structural design. Based on that, the objective of this project is to analyze the elastic behavior of concretes using coarse natural aggregates (NA) and 50% of substitution of these aggregate by coarse recycled concrete aggregates (RCA). The elastic behavior was determined by both a destructive method (static) and a nondestructive one (dynamic) on the ages of 7, 28 and 63 days for the loading levels of 0 (only dynamic), 20, 30, 40, 50, 60, 70 and 80% of respective concrete strength. The found results for the Modulus of Elasticity have been compared to estimates based on the empirical recommendations by CEB-FIP Model Code 1990, ACI 318 (2011) and NBR 6118 (ABNT, 2007 and 2014) standards. The objectives of this work were to observe the influence of the RCA on the elastic properties of concrete; to compare the elastic behavior between concretes with and without RCA, to study the correlation of both experimental methods (dynamic and static) and finally to check the relation between measured and calculated values of modulus of elasticity. The conclusions indicate that concretes with and without RCA have similar elastic limits (between 40% and 50% of the concrete strength); it is not possible to identify a unique relationship between the values obtained by dynamic and static methods for both concretes; it is not possible to assert that concretes with similar strength, but different ages, have different modulus; the values of modulus of elasticity obtained by the static method for both concretes are significantly below that indicated by the considered standards; the values of modulus of elasticity obtained by the dynamic method for concrete with and without RCA are contained in the range between the more and less conservative standards and concretes with RCA have a similar behavior than concretes without RCA, but are less rigid (larger strain for the same stress).
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Marchi, Renata D\'Agostino De. "Estudo sobre a variabilidade do módulo de deformação do concreto associada a fatores intrínsecos à produção do material." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/3/3146/tde-23032012-102942/.

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Em função da especificação do módulo de elasticidade ou módulo de deformação do concreto ser cada vez mais frequente, se faz necessário o conhecimento da variabilidade desta propriedade, relacionada ao processo de produção, de modo a tornar mais confiável sua avaliação e que possibilite melhores condições no controle de produção para o atendimento aos requisitos associados a esta propriedade. Várias pesquisas têm comprovado que a variabilidade das propriedades mecânicas dos materiais de construção obedece a processos aleatórios. Portanto, os métodos de segurança no projeto estrutural devem estar fundamentados no conceito da teoria das probabilidades e não em métodos deterministas. Isso já acontece para a determinação da resistência à compressão, conforme estabelecido pela ABNT NBR 12655 (2006). A presente dissertação tem como objetivo principal estudar o controle experimental do módulo estático de deformação do concreto, mostrando a influência da variação dos materiais constituintes do concreto, dentro da realidade de uma Central de Concreto. Também objetiva apresentar uma discussão da aplicabilidade do conceito semiprobabilístico das normas nacionais de projeto, dosagem e controle tecnológico à propriedade módulo de deformação do concreto. A metodologia da pesquisa envolveu a escolha de uma central dosadora de concreto localizada na cidade de São Paulo, com a avaliação em dois concretos de resistências características (f ck ) de 25 e 30 MPa, que são comumente solicitados no mercado em que se insere. Para cada f ck foram realizados ensaios para determinação do módulo de deformação secante, E cs, três vezes por semana por um período de nove meses. Em função da precisão observada em pesquisa recente, foi utilizada a instrumentação clip gage para avaliação da propriedade módulo de deformação. Foram realizados ensaios sob o plano de carregamento secante, previsto na ABNT NBR 8522 (2008). Concluiu-se que, pelo fato do módulo de deformação do concreto ser influenciado pela resistência à compressão, que obedece a uma distribuição probabilística, não se pode atribuir à propriedade uma característica determinística, incorrendo no risco de não atendimento da propriedade. Recomendou-se o estabelecimento de tolerâncias para a especificação do módulo de deformação, uma vez que é uma variável com distribuição de probabilidade de rejeição. Sugeriu-se a discussão de mudança de enfoque no controle do módulo de deformação do concreto, com o controle por valor característico, tal qual ocorre para a resistência à compressão, atribuindo-se um estimador que atribua valores inferiores ao módulo de deformação, considerando-se uma rejeição aceitável. Também pode-se atribuir uma faixa de variação aceitável do valor em torno da média, uma vez que a responsabilidade estrutural do parâmetro módulo de deformação é menor do que o da resistência à compressão.
The modulus of elasticity requirements for concrete structures is becoming even more frequent. So, the knowledge of the variables involved in the experimental results became more important in order to make more reliable its assessment and enabling better conditions for specifications requirements attendance in relation to this property. Several studies have shown that the variability of mechanical properties of construction materials is subjected to random processes. Therefore, the security methods in the structural design must be based in the probability theory concept rather than deterministic methods. The randomness of the, compressive strength of concrete is already take in account in the quality control process according to the Brazilian Standard ABNT NBR 12655 (2006). The present work aims to study the experimental control of static modulus of elasticity of concrete, showing the influence of the constituent materials used in a Concrete Ready Mix Plant. It also intends to present a discussion on the applicability of the semi-probabilistic concept of national design standards in the mix design and production control of concrete in order to attend the elastic modulus requirements. The research methodology had two main steps: the first one, developed at a Concrete Ready Mix Plant located in São Paulo City, was based on the assessment of two characteristic compressive strength (f ck ) of 25 MPa and 30 MPa, which are commonly demanded in this market. For each strength class, tests were done to evaluate the variability of static modulus of elasticity of concrete, E cs, three times per week, during a period of nine months. On the second step, an analysis of elastic modules of concretes provided at six different sites, where the characteristic strength was 30 MPa, which was made using the same materials used in the first step. It has been used the clip gage instrumentation for measuring deformation to the assessment of static modulus of elasticity of concrete. It was used due to the precision that has been observed in recent research. The evaluation has been done according to the Brazilian Standard ABNT NBR 8522 (2008). It was possible to conclude that the modulus of elasticity of concrete is influenced by the compressive strength, so it follows a probabilistic distribution and cannot be associated to a deterministic model of quality control, due to the risk of non-compliance of the requirement. It was recommended the establishment of tolerances for the measured modulus of elasticity results, taking in account its random characteristic. The possibility of changing the focus on modulus of elasticity quality control was proposed, turning the deterministic criterion as occurs for the compressive strength, giving an estimator that assigns lower values to the modulus of elasticity, considering an acceptable rejection. It can be also based in a method that allows the acceptance of a concrete that lies within a predetermined tolerance around the average value, because the structural responsibility of modulus of elasticity is lower than the compressive strength.
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Kocuba, Robert. "Diagnostika a hodnocení prefabrikované železobetonové konstrukce." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372269.

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This thesis deals with inspection and constructionally technical research of reinforced concrete prefabricated construction from the second half of 20th century. In theoretical part, the research of literature, documents and valid standards is performed, with a focus on production and construction of prefabricated elements and also on the metodology of research. In practical part, the detection of reinforcement of individual elements of the construction and concrete properties is performed. The result of this work is the assessment of the state of the construction, static calculation of the ceiling panel and idea proposal for eventual reconstruction.
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Kocáb, Dalibor. "Experimentální stanovení faktorů ovlivňujících statický modul pružnosti betonu s využitím nedestruktivních zkušebních metod." Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-355639.

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The Ph.D. thesis deals with one of the most important characteristics of hardened concrete; i.e. the modulus of elasticity. The thesis aims to describe and evaluate the important factors that affect the final value of concrete modulus of elasticity, especially those that can be influenced during construction. Another aim is to find ways to determine the static modulus of elasticity of concrete by non-destructive means (primarily ultrasonic pulse method, resonance method and use of electronic rebound hammers), thus to determine the possibility of creating calibration curve for NDT determination of the modulus of elasticity.
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Sousa, Fernando Henrique Fernandes. "Avaliação da relação entre os módulos de elasticidade estático e dinâmico de concretos produzidos com agregados graúdos reciclados em substituição aos agregados graúdos naturais." Universidade do Vale do Rio dos Sinos, 2018. http://www.repositorio.jesuita.org.br/handle/UNISINOS/7170.

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O módulo de elasticidade é um parâmetro que mensura a rigidez do concreto, sendo uma das propriedades que é levada em consideração na verificação da segurança estrutural, pois expressa as condições dos estados limites último e de serviço. Quando é avaliada - a influência da substituição de agregados graúdos naturais por agregados graúdos reciclados - o comportamento elástico do concreto torna-se imprescindível, uma vez que não é similar ao comportamento de resistência à compressão, que por sua vez pode alcançar resistências superiores ao concreto produzido inteiramente com agregados graúdos naturais. Nesse sentido, o uso da resistência à compressão como parâmetro único, para se estimar o módulo de elasticidade do concreto produzido com agregados graúdos reciclados, tem sido cada vez mais questionável. Tratando-se da influência do uso de agregado graúdo reciclado no módulo de elasticidade do concreto, poucos são os estudos que apresentam os valores de módulo de elasticidade estático e módulo de elasticidade dinâmico. Diante disso, o objetivo desta pesquisa é avaliar a relação entre o módulo de elasticidade estático e o módulo de elasticidade dinâmico de concretos produzidos com agregados graúdos reciclados em substituição aos agregados graúdos naturais, com o intuito de relacionar o tipo de agregado graúdo ao módulo de elasticidade. Para tal, foram utilizados agregados graúdos reciclados de concreto e agregados graúdos reciclados de cerâmica vermelha em taxa de substituição de 30% em relação ao agregado graúdo natural. Os concretos foram produzidos em três traços experimentais, sendo eles: traço pobre (maior relação a/c), traço intermediário e traço rico (menor relação a/c). As propriedades dos concretos foram avaliadas aos 28 dias, sendo elas: massa específica do concreto no estado fresco e endurecido; porosidade; resistência à compressão; módulos de elasticidade estático e dinâmico. Como principais resultados, verificou-se que o tipo de agregado graúdo reciclado de modo geral influenciou negativamente o módulo de elasticidade, sendo essa influência mais pronunciada no módulo de elasticidade dinâmico; não foi possível obter uma relação entre o módulo de elasticidade estático e dinâmico dos concretos produzidos com agregados graúdos reciclados; o módulo de elasticidade estático dos concretos produzidos com agregados graúdos reciclados é mais fortemente relacionado à resistência e à compressão; o módulo de elasticidade dinâmico possui maior relação com a porosidade dos concretos produzidos com agregados graúdos reciclados; os módulos de elasticidade estimados por equações algébricas apresentam elevada variabilidade.
Modulus of elasticity is a parameter that measures the stiffness of the concrete, being one of the properties taken into account in the structural safety check, since it expresses the conditions of the ultimate and service boundary state. When the influence of the replacement of natural aggregates by recycled aggregates is evaluated, the elastic behavior of the concrete becomes essential, since it cannot be compared to the behavior of compressive strength, usually lower than the concrete produced with natural aggregates. The use of compressive strength as a single parameter to estimate the modulus of elasticity of concrete produced with recycled aggregates has been increasingly questionated. Considering the influence of the use of recycled aggregate on the modulus of elasticity of concrete, only a few studies have compared the values of static elastic modulus and dynamic modulus. This research aims to evaluate the relationship between the static elastic modulus and the dynamic elastic modulus of concrete produced with recycled aggregates in replacement of natural aggregates, in order to correlate the type of aggregate to the modulus of elasticity, verifying the relationship between the two procedure of determination of elasticity modulus. Aggregates made of recycled concrete and of ceramic bricks were used in a replacement rate of 30% to the natural aggregate. The concretes were produced in three experimental proportions (lower w/c ratio, intermediate w/c ratio and higher w/c ratio). The properties evaluated at 28 days are: bulk concrete mass; porosity; compressive strength; static and dynamic modulus of elasticity. The main conclusions are: the recycled aggregate decrease the modulus of elasticity, mainly the dynamic modulus; there are no relationship between the static and dynamic modulus of elasticity of concrete produced with recycled aggregates; the static modulus of concrete produced with recycled aggregates has a higher relationship to the compressive strength; the dynamic modulus of elasticity is higher related to the porosity of concrete produced with recycled aggregates; the moduli of elasticity estimated by algebraic equations present high variability.
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Montija, Fernando Celotto. "Aspectos da variabilidade experimental do ensaio de módulo de deformação do concreto." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/3/3146/tde-01042009-135948/.

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Esta dissertação insere-se nas áreas de qualidade laboratorial e de ensaios de controle de concreto, especificamente quanto à propriedade módulo estático de deformação ou módulo de Young. A motivação do trabalho é a elevada variabilidade de resultados experimentais observada pelo meio técnico nacional em ensaios interlaboratoriais, cujos resultados indicam desvios-padrão totais da ordem de 3,5 GPa, valor significativo para o controle tecnológico de obras de construção civil. Os objetivos buscados foram a identificação das parcelas da variabilidade oriundas da produção e do ensaio, com especial atenção àquela originada na instrumentação para medida das deformações durante o ensaio, e a discussão da aplicabilidade do conceito semiprobabilístico normativo à propriedade módulo de deformação do concreto. Além disso, a própria discussão da aplicabilidade da sistemática de pesquisa e análise sobre este tipo de ensaio e de material constou como um objetivo do trabalho. Para tal, desenvolveu-se um programa experimental em duas etapas: a primeira foi destinada às avaliações de acurácia (precisão e exatidão) do método de ensaio. As avaliações se deram segundo roteiros da área metrológica para validação de métodos e sistemas de medida. De quatro instrumentações para medida das deformações testadas, uma se mostrou mais precisa (identificada como clip gages) e outra se mostrou a mais suscetível a erros sistemáticos e aleatórios entre as testadas (identificada como compressômetro com dois relógios comparadores). Recomendou-se a ampliação do programa experimental para o âmbito interlaboratorial, pois, a rigor, o método de ensaio vigente não poderia ser considerado validado em termos de acurácia baseando-se unicamente nos resultados deste programa experimental. Porém, concluiu-se pela possibilidade de aceitação prática do método independentemente da utilização de três de um total de quatro tipos de instrumentação para medida das deformações testados em ensaio, sem que houvesse prejuízo para a produção ou o controle tecnológico usual desta propriedade. Na segunda etapa, obteve-se um Diagrama de Dosagem e estudou-se um cenário de fornecimento de concreto sob critérios estatísticos diferentes de atendimento à especificação de módulo de deformação: utilização do valor característico e do valor médio, com diferença de 4 GPa entre eles. Estimou-se um aumento da ordem de 9% no deslocamento vertical de uma viga simples bi-apoiada quando executada com o concreto de menor módulo em relação à execução com o de maior módulo. Por sua vez, o concreto de maior módulo exigiria um aumento no consumo de cimento da ordem de até 200 kg/m3, se conservados todos os insumos materiais e os demais parâmetros tecnológicos contidos nos traços. Concluiu-se pela aplicabilidade do uso da sistemática empregada na avaliação da acurácia do método de ensaio e do uso do conceito semiprobabilístico para esta propriedade.
This work is developed into the areas of laboratorial quality and concrete control tests, specifically focusing on the static modulus of elasticity or Young´s modulus. The motivation of this work is the high variability of experimental results observed by national technicians in interlaboratorial tests. These results show total standard deviations of around 3.5 GPa, a significant value for the technological control for civil construction. The main objectives are the identification of the variability fragments derived from the production and test, specially the ones related to the instrumentation for measuring deformations during the test, and the discussion of the semi-probabilistic concept applicability on the concrete Young´s modulus control. Moreover, the discussion of the applicability of the procedure used in this work and its analysis are also objective pursued here. The experimental program was developed in two steps: the first step covered the accuracy assessments (precision and exactness) of test method. The assessments were carried out according to instructions from Metrology concepts for the validation of the methods and the measure systems. One out of four instrumentations for measuring the tested deformations proved to be more precise (identified as clip gages) and another one proved to be more susceptible to systematic and random errors (identified as a compressometer with two dial indicators). The extension of the experimental program to an interlaboratorial scope is recommended because the current test method could not be considered valid based only on the results of this experimental program. However, it was shown that the practical acceptance of the test method for three among the four kinds of instrumentations analyzed, without damaging the production or the usual technological control of this property, is possible. On the second step, a mix design diagram was obtained and a case of supply of concrete under different statistical criteria (fulfillment the modulus of elasticity specification): the use of the characteristic value and the average value, with difference of 4 GPa between them. An increase of 9% on the vertical transference of a simple dual supported beam was observed when using a lower modulus concrete, when compared to another one with a higher modulus. On the other hand, the modulus increase would require an increment in the cement consumption up to 200 kg per cubic meter, if all the material inputs and further technological parameters is maintained. The final conclusion was that the procedure used on the assessment of the test method accuracy and the semi-probabilistic concept on this material property is applicable.
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Books on the topic "Modulus of elasticity of concrete"

1

Shaker, Atif F. The effective modulus of elasticity of concrete in tension. Edmonton, Alta., Canada: Dept. of Civil Engineering, University of Alberta, Canada, 1991.

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Standards, Association of Australia Committee BD/42 Methods of Testing Concrete. Methods of testing concrete: Determination of the modulus of rupture. 3rd ed. [North Sydney, N.S.W.]: Standards Australia, 1985.

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K, Kokula Krishna Hari, ed. Determination of Modulus of Elasticity of Hybrid composite material with reinforcement of Coconut coir: ICIEMS 2014. India: Association of Scientists, Developers and Faculties, 2014.

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Prestressed bodies. Harlow, Essex, England: Longman Scientific, 1989.

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Ubysz, Andrzej. Odkształcenia plastyczne i samonaprężenia w żelbetowych konstrukcjach prętowych. Wrocław: Wydawn. Politechniki Wrocławskiej, 1999.

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Juirnarongrit, Teerawut. Effect of pile diameter on the modulus of sub-grade reaction. La Jolla, Calif: Department of Structural Engineering, University of California, San Diego, 2005.

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Dutt, Pravir. A spline-based parameter estimation technique for static models of elastic structures. Hampton, Va: ICASE, 1986.

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Lee, Hosin David. Validation of the mix design process for cold in-place rehabilitation using foamed asphalt. Iowa City, Iowa: Public Policy Center, University of Iowa, 2007.

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Bansal, Narottam P. Solid state synthesis and properties of monoclinic celsian. [Washington, D.C: National Aeronautics and Space Administration, 1996.

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Li, Jian. Simplified data reduction methods for the ECT test for mode III interlaminar fracture toughness. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1995.

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Book chapters on the topic "Modulus of elasticity of concrete"

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Saju, Aleesha Anna, and K. K. Smitha. "Evaluation of Modulus of Elasticity of Plastic Aggregate Concrete." In Lecture Notes in Civil Engineering, 405–17. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-80312-4_36.

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Suzila, R., M. S. Hamidah, A. Anizahyati, and M. R. Ahmad Ruslan. "Fibre Reinforced Modulus of Elasticity and Compressive Strength of Foamed Concrete." In InCIEC 2013, 589–96. Singapore: Springer Singapore, 2014. http://dx.doi.org/10.1007/978-981-4585-02-6_51.

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Özerkan, N. G., and İ. Ö. Yaman. "Use of Dynamic Modulus of Elasticity to Assess the Durability of Self Consolidating Concrete." In Nondestructive Testing of Materials and Structures, 303–8. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0723-8_43.

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Hadjab, Hadda, Ahmed Arbia, and Oussama Boulekfouf. "The Use of Ultrasonic Waves and Analytical Modeling to Estimate Elasticity Modulus of Rubber Concrete Specimen." In Advanced Structured Materials, 49–57. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-07383-5_4.

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Ngo, Van Thuc, Tien Thanh Bui, Thi Cam Nhung Nguyen, Thi Thu Nga Nguyen, and Thanh Quang Khai Lam. "Effect of Nano-Silica Content on Compressive Strength and Modulus of Elasticity of High-Performance Concrete." In Lecture Notes in Civil Engineering, 153–59. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-0053-1_19.

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Danoglidis, P. A., and M. S. Konsta-Gdoutos. "Reinforcing Concrete with Carbon Nanotubes and Carbon Nanofibers: A Novel Method to Improve the Modulus of Elasticity." In Structural Integrity, 98–99. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-91989-8_19.

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Rahim, Jamilah Abd, Siti Hawa Hamzah, and Hamidah Mohd Saman. "Determination of Modulus Elasticity and Poison Ratio of Expanded Polystyrene (EPS) Lightweight Concrete (LWC) Enhanced with Steel Fiber." In InCIEC 2014, 29–36. Singapore: Springer Singapore, 2015. http://dx.doi.org/10.1007/978-981-287-290-6_3.

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Yazyev, Serdar, Mukhtar Bekkiev, Evgeniy Peresypkin, and Mikhail Turko. "Task for a Prestressed Reinforced Concrete Cylinder with External Reinforcement and Cylinder Optimization by Varying the Modulus of Elasticity." In International Scientific Conference Energy Management of Municipal Transportation Facilities and Transport EMMFT 2017, 869–76. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-70987-1_93.

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Lüttschwager, Nils Olaf Bernd. "Modulus of Elasticity." In Raman Spectroscopy of Conformational Rearrangements at Low Temperatures, 127–44. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-08566-1_6.

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Keaton, Jeffrey R. "Modulus of Elasticity." In Encyclopedia of Earth Sciences Series, 666. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-73568-9_205.

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Conference papers on the topic "Modulus of elasticity of concrete"

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Gherman, Oana. "MODULUS OF ELASTICITY OF HIGH STRENGTH CONCRETE." In 17th International Multidisciplinary Scientific GeoConference SGEM2017. Stef92 Technology, 2017. http://dx.doi.org/10.5593/sgem2017/62/s26.037.

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Maheswari, S., M. B. Anoop, and K. Balaji Rao. "Probabilistic Analysis of Modulus of Elasticity of Concrete Through Multiscale Modelling." In 5th International Congress on Computational Mechanics and Simulation. Singapore: Research Publishing Services, 2014. http://dx.doi.org/10.3850/978-981-09-1139-3_170.

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Pratama, M. Mirza Abdillah, Buntara Sthenly Gan, Han Ay Lie Han Ay Lie, and Andika Bagus Nur Rahma Putra. "A Numerical Analysis of The Modulus of Elasticity of The Graded Concrete." In Proceedings of the 2nd International Conference on Vocational Education and Training (ICOVET 2018). Paris, France: Atlantis Press, 2019. http://dx.doi.org/10.2991/icovet-18.2019.29.

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Kocáb, Dalibor, Romana Halamová, Barbara Kucharczyková, and Petr Daněk. "Development of the modulus of elasticity of cement materials in the early stage of ageing." In SPECIAL CONCRETE AND COMPOSITES 2019: 16th International Conference. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0000398.

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Buari, T. A., Festus Olutoge, and G. M. Ayininuola. "RELATIONSHIP BETWEEN COMPRESSIVE STRENGTH AND MODULUS OF ELASTICITY OF SELF CONSOLIDATING HIGH PERFORMANCE CONCRETES (SCHPCS) INCORPORATING GSA AS SCM." In International Conference on Emerging Trends in Engineering & Technology (IConETech-2020). Faculty of Engineering, The University of the West Indies, St. Augustine, 2020. http://dx.doi.org/10.47412/aktq7222.

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This experimental work evaluates the relationship between compressive strength and modulus of Elasticity of self-consolidating High performance concrete (SCHPC) containing high volume of Groundnut Shell Ash (GSA) up to 40% substitution as SCM. A total of 210 specimens of the GSA blended SCHPCs comprising 105 cubes (100 x100 mm) and 105 cylinders (150x300 mm) were cured in water for 7,14,28 ,56, 92,120 and 180 days hydration periods and the compressive strength and Modulus of elasticity determined. The linear relationships were studied with regression analysis. The findings revealed that all the mixes met the Modulus of Elasticity values requirement of 18,000N/mm2 to 42,000N/mm2 and the compressive results show that three substitution levels of 0%, 10% and 20% attained the proposed design strength (40-130 Mpa) and also satisfied the requirement for self-consolidating and high strength concretes. In conclusion, 0%-20% GSA substitutions (SCHPCA0-SCHPCA20) indicated a strong linear relationship with regressions values obtained varies between 0.842 and 0.954 for the two variables. Addition of GSA as SCM has improved the mechanical properties of SCHPC and creates a strong relationship between the compressive strength and Modulus of Elasticity.
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Rizos, Dimitrios C. "High-Strength Reduced-Modulus High Performance Concrete (HSRM-HPC) for Prestressed Concrete Tie Applications." In 2016 Joint Rail Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/jrc2016-5798.

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A High-Strength Reduced-Modulus High Performance Concrete (HSRM-HPC) for use in prestressed concrete rail ties has been developed by the authors. The HSRM-HPC material was originally considered for highway bridges but was rejected because of the accidental finding of the low modulus of elasticity. It is shown that the elastic modulus of the HSRM-HPC is reduced as much as 50% compared to the conventional HPC of the same strength while preserving all other properties of the conventional HPC. The use of the more flexible HSRM-HPC in concrete ties leads to reduced stress amplitudes and regularized stress fields at the rail seat area and the middle segment of the tie, which are the two most critical areas of tie failure. This work discusses the development and characterization of the HSRM HPC material, as well as current work on the performance assessment of such ties. The material development, material characterization, and performance assessment is conducted through experimental testing and computer simulations. The benefits of HSRM-HPC ties are quantified and discussed.
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Han, T., J. Huang, K. Khayat, A. Kumar, and H. Ma. "Prediction of Compressive Strength and Modulus of Elasticity of Concrete Using Machine Learning Models." In MS&T19. TMS, 2019. http://dx.doi.org/10.7449/2019mst/2019/mst_2019_604_611.

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Han, T., J. Huang, K. Khayat, A. Kumar, and H. Ma. "Prediction of Compressive Strength and Modulus of Elasticity of Concrete Using Machine Learning Models." In MS&T19. TMS, 2019. http://dx.doi.org/10.7449/2019/mst_2019_604_611.

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Gailitis, Rihards, Andina Sprince, Leonids Pakrastins, Genadijs Shakhmenko, Tomass Kozlovskis, and Liga Radina. "Long-term properties of foamed concrete." In The 13th international scientific conference “Modern Building Materials, Structures and Techniques”. Vilnius Gediminas Technical University, 2019. http://dx.doi.org/10.3846/mbmst.2019.067.

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Foamed concrete has been used as a building material since the early 1920s. In the beginning, it was used as an insulation material with very low density. Since then there have been attempts to improve the structural properties in order to increase materials load-bearing capacity. In the present-day foamed concrete is being used in soil reinforcement, manufacturing of building blocks and other sorts of construction materials (Mugahed Amran, Farzadnia, & Abang Ali, 2015). The aim of this article is to determine the behaviour and long-term properties of foamed concrete. Cylindrical specimens (Ø46×190 mm) were used for creep and shrinkage testing. The creep properties of the specimens were determined by loading them with 20% and 60% of the ultimate compressive stress value (Sprince, 2015). The compressive strength, creep, shrinkage and specific creep of the material were examined. It was determined that during 90 days of creep testing the non-linear creep deformations (specimens loaded with 60% of the ultimate stress) are 4 times larger than linear creep deformations (specimens loaded with 20% of the ultimate stress). Also, changes in the modulus of elasticity of foamed concrete were researched over time. Foamed concrete modulus of elasticity reached 12.21 GPa on the 28th day, 12.49 GPa on the 62nd and 14.23 GPa on the 144th day since the specimens were made.
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Ong, Chong Yong, Kok Keong Choong, Geem Eng Tan, and Tai Boon Ong. "Full Scale Load Test of A 20m Span Precast Concrete Closed Spandrel Arch Bridge System With Corrugated Section." In IABSE Conference, Kuala Lumpur 2018: Engineering the Developing World. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2018. http://dx.doi.org/10.2749/kualalumpur.2018.0933.

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<p>A new form of precast concrete closed spandrel arch bridge with corrugated section was introduced and developed in Malaysia in the year of 2008. Due to its high stiffness to self-weight ratio, this precast arch system is beneficial to the sustainable bridge construction. In order to study the actual performance of this precast arch system, a full scale load test on a 20m span arch bridge using two 88 tonnes trucks is presented in this paper. Total of five types of truck arrangement were carried out. Vertical deflection at mid span and foundation settlement were measured. It is found that the maximum vertical deflection recorded under 2 x 88 tons trucks was 3.67mm, corresponding to 1/5450 (deflection/span) ratio and there was no noticeable settlement of foundation. Analysis model load test is done using 2D analysis model PLAXIS. The results were compared to the designed analysis model with HB-45 unit loading. It is found that the internal forces of the load test are closed to the designed loading. However, the deflection in the load test analysis model is higher than actual measured deflection, probably due to the assumed value of soil modulus of elasticity and concrete modulus of elasticity. In order to approximate the deflection in the load test analysis model to the actual measured deflection, a series of sensitivity analysis on different soil young modulus and concrete young modulus were carried out.</p>
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Reports on the topic "Modulus of elasticity of concrete"

1

Carter, Austin D., and S. Elhadj. Modulus of Elasticity and Thermal Expansion Coefficient of ITO Film. Office of Scientific and Technical Information (OSTI), June 2016. http://dx.doi.org/10.2172/1325877.

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Verrill, Steve P., Frank C. Owens, David E. Kretschmann, and Rubin Shmulsky. Statistical models for the distribution of modulus of elasticity and modulus of rupture in lumber with implications for reliability calculations. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, 2017. http://dx.doi.org/10.2737/fpl-rp-692.

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Shives, T. Robert, and Richard J. Fields. Modulus of elasticity and Poisson's ratio for types 17-4 PH and 410 stainless steels in compression. Gaithersburg, MD: National Institute of Standards and Technology, 1991. http://dx.doi.org/10.6028/nist.ir.4671.

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Kretschmann, David, James Evans, Mike Wiemann, Bruce A. Kimball, and Sherwood B. Idso. Long-term effects of elevated carbon dioxide concentration on sour orange wood specific gravity, modulus of elasticity, and microfibril angle. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, 2007. http://dx.doi.org/10.2737/fpl-rn-307.

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Olek, J., Menashi Cohen, and Charles Scholer. Use of Modulus of Rupture, Fatigue Resistance and Maturity in Determining Opening to Traffic Time for Concrete Pavements. West Lafayette, IN: Purdue University, 2003. http://dx.doi.org/10.5703/1288284313341.

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