Mechanical properties of high strength concrete with scrap tire rubber

Moustafa, Ayman; ElGawady, Mohamed A.

doi:10.1016/j.conbuildmat.2015.05.115

Cited by 148 publications

(60 citation statements)

References 10 publications

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“…The strength results used for validation of Equation 2 Equation (2b) in Figure 9. Table 3 depicts the main characteristics of the mixes used for the calibration of Equation (2). For a target total average test-to-predicted strength ratio of 1.00, the coefficient of variation (COV) increases from 10.1% for CA+FA to 12.1% for FA and to 13.4%…”

Section: Compressive Strengthmentioning

confidence: 99%

“…Material tests on both fresh and hardened concrete indicated that the replacement of mineral aggregates with rubber particles modifies significantly the mechanical properties of the new composite material [1][2][3][4][5]. On the one hand, concrete is an implicitly brittle material which is a function of the strength of the cement paste, whereas rubber is a hyper-elastic incompressible material with high Poisson ratio and has a high tensile strength.…”

Section: Introductionmentioning

confidence: 99%

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Experimental assessment and constitutive modelling of rubberised concrete materials

Bompa

Elghazouli

Stafford

et al. 2017

Construction and Building Materials

117

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This paper focuses on examining the uniaxial behaviour of concrete materials incorporating rubber particles, obtained from recycled end-of-life tyres, as a replacement for mineral aggregates. A detailed account of a set of material tests on rubberised concrete cylindrical samples, in which fine and coarse mineral aggregates are replaced in equal volumes by rubber particles with various sizes, is presented. The experimental results carried out in this investigation, combined with detailed examination of data available from previous tests on rubberised concrete materials, show that the rubber particles influence the mechanical properties as a function of the quantity and type of the mineral aggregates replaced. Experimental evaluation of the complete stress-strain response depicts reductions in compressive strength, elastic modulus, and crushing strain, with the change in rubber content. Enhancement is also observed in the energy released during crushing as well as in the lateral strain at crushing, primarily due to the intrinsic deformability of the interfacial clamping of rubber particles which leads to higher lateral dilation of the material. The test results and observations enable the definition of a series of expressions to estimate the mechanical properties of rubberised concrete materials. An analytical model is also proposed for the detailed assessment of the complete stress-strain response as a function of the volumetric rubber ratio. Validations performed against the material tests carried out in this study, as well as those from previous investigations on rubberised concrete materials, show that the proposed models offer reliable predictions of the mechanical properties including the full axial and lateral stress-strain response of concrete materials incorporating rubber particles

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Section: Compressive Strengthmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental assessment and constitutive modelling of rubberised concrete materials

Bompa

Elghazouli

Stafford

et al. 2017

Construction and Building Materials

117

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“…After almost two decades, the idea to combine concrete with waste recycled tire rubber as an aggregate replacement is still the subject of a large number of experimental investigations. To date, a considerable number of authors investigated traditional concrete with recycled rubber derived from end-of-life tires (ELTs), and it is known that this type of environmentally friendly concrete has been used in non-structural concrete elements such as traffic noise barriers, sidewalks, and sport fields [1][2][3][4] mainly because the implementation of the waste tire rubber in concrete reduces the value of the compressive strength and modulus of elasticity of concrete [5][6][7][8][9][10][11][12][13]. On the other hand, a smaller number of authors investigated the self-compacting rubberized concrete (SCRC) in terms of concrete used for structural elements [8,[14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Prediction Models for the Mechanical Properties of Self-Compacting Concrete with Recycled Rubber and Silica Fume

et al. 2020

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The paper aims to investigate the influence of waste tire rubber and silica fume on the fresh and hardened properties of self-compacting concrete (SCC) and to design multivariate regression models for the prediction of the mechanical properties of self-compacting rubberized concrete (SCRC). For this purpose, 21 concrete mixtures were designed. Crumb rubber derived from end-of-life tires (grain size 0.5–3.5 mm) was replaced fine aggregate by 0%, 5%, 10%, 15%, 20%, 25%, and 30% of total aggregate volume. Silica fume was replaced cement by 0%, 5%, and 10% of the total cement mass. The optimal replacement level of both materials was investigated in relation to the values of the fresh properties and mechanical properties of self-compacting concrete. Tests on fresh and hardened self-compacting concrete were performed according to the relevant European standards. Furthermore, models for predicting the values of the compressive strength, modulus of elasticity, and flexural strength of SCRC were designed and verified with the experimental results of 12 other studies. According to the obtained results, mixtures with up to 15% of recycled rubber and 5% of silica fume, with 28 days compressive strength above 30 MPa, were found to be optimal mixtures for the potential future investigation of reinforced self-compacting rubberized concrete structural elements.

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“…A study focusing on the mechanical properties of high-strength concrete with the addition of rubber particles up to 30% volume replacement showed that the concrete-rubber mixture had higher mechanical damping properties compared to conventional concrete [8]. The addition of rubber particles in concrete increases its durability and crack resistance.…”

Section: Introductionmentioning

confidence: 99%

The Properties of Recycled Rubber From Waste Tires in the Production of Cement Composites

Svoboda¹,

Václavík²,

Dvorský³

et al. 2020

GSE

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This article presents the results of a study dealing with the use of a combination of recycled rubber from waste tires as a 100% substitute in the production of cement composites. Aggregate was replaced with recycled rubber in two ratios, namely the ratio of 50/50 and the ratio of 40/60 of the share of fraction 0/1 mm and fraction 1/3 mm. The designed formulas of cement composites were subjected to the tests of their physical and mechanical properties in order to determine the properties of the used recycled rubber combination. The tests included the consistency of the grain curve, mixing water properties, consistency of cement mortar, and strength characteristics (tensile flexural strength and compressive strength). The study presents results that are fundamentally different from the comparative samples and their use in the building industry; however, at the same time, they open up new possibilities of their utilization as a building material.The consistency of fresh mortar was determined by means of a diffusion test carried out according to ČSN EN 1015-3 [18] using a flow table. Determination of tensile flexural strength and compressive strengthThe determination of tensile flexural and compressive strengths was performed after 3, 7 and 28 days of age of the test specimens according to . The testing was carried out using the prepared test specimens with the dimensions of 40x40x160 mm, which were stored in a water bath prior to the test. Formtest instrument with a compressive force of 100KN and 300KN was used as the testing equipment. Determination of hardened mortar densityThe test specimens prepared according to formulas Z2 and Z3 were dried to a stable weight and subsequently tested to determine the density of hardened mortar according to ČSN EN 1015-10 standard [20]. RESULTS AND DISCUSSION Determination of grain-size curve of recycled rubberSieves with mesh sizes of 0.063, 0.125, 0.25, 0.5, 1.0, 1.6, 2.0, 2.5, 3.0, 4.0, and 5.0 mm were used to determine the grain-size curve of rubber granulate with the fractions of 0/1 and 1/3 mm. The resulting grain-size curves are shown in Figure 2. by using admixtures (e.g. plasticizers). At the same time, these results open up new possibilities for the utilization of this material as an environmentally friendly building material. The modifications of this cement compound and further testing of its physical and mechanical properties will be the subject of further research.

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Mechanical properties of high strength concrete with scrap tire rubber

Cited by 148 publications

References 10 publications

Experimental assessment and constitutive modelling of rubberised concrete materials

Experimental assessment and constitutive modelling of rubberised concrete materials

Prediction Models for the Mechanical Properties of Self-Compacting Concrete with Recycled Rubber and Silica Fume

The Properties of Recycled Rubber From Waste Tires in the Production of Cement Composites

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