Mechanical characterization of rubberized concrete using an image-processing/XFEM coupled procedure

Duarte, A.P.C.; Silva, B.A.; Silvestre, Nuno; Brito, Jorge de; Júlio, Eduardo

doi:10.1016/j.compositesb.2015.03.082

Cited by 43 publications

(13 citation statements)

References 10 publications

(13 reference statements)

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“…At the same time this may reduce the possibility of reflection of these cracks into the surface course of the pavement which is due to stress concentration in the upper layer where it rests layer on a cement-stabilized base course having wide cracks. Similar behaviour was also reported by (Duarte et al 2015) when they investigated the failure pattern of normal concrete samples.…”

Section: Effect Of Cement Content On Failure Patternssupporting

confidence: 61%

“…Furthermore, (Duarte et al 2015) findings revealed that damage and cracking is more concentrated in the concrete mixtures containing no rubber, but that is not the case for the rubberized concrete. There the damage is more widely distributed.…”

Section: Overall Discussion Regarding Fracture Mechanismmentioning

confidence: 90%

“…Theoretical studies conducted by (Duarte et al 2015) and (Eldin and Senouci 1993) for rubberized concrete revealed that the cracks initiated near the rubber particles due to the stress concentration at these locations. Furthermore, (Duarte et al 2015) findings revealed that damage and cracking is more concentrated in the concrete mixtures containing no rubber, but that is not the case for the rubberized concrete.…”

Section: Overall Discussion Regarding Fracture Mechanismmentioning

confidence: 99%

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Effect of cementation level on performance of rubberized cement-stabilized aggregate mixtures

2016

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An investigation and comparison is made of the effect of cement content on the performance of rubberized cement-stabilized aggregate mixtures and on cement-stabilized aggregate mixtures containing no rubber (RCSAMs and CSAMs). These materials are intended to be used as a base course for pavement structures. Three cement contents (3%, 5%, and 7% by dry weight of aggregate) were investigated. Rubberized mixtures were manufactured by replacing 30% of one aggregate fraction that has a similar gradation of crumb rubber.Performance was evaluated under static and dynamic testing. The investigated properties are unconfined compressive strength, indirect tensile strength, indirect tensile static modulus, toughness, dynamic modulus of elasticity, dynamic modulus of rigidity and dynamic Poisson's ratio. Increasing cement content increases strength of both types of mixtures, especially in the CSAMs. It is found that using crumb rubber at low cement content is more feasible than with high cement contents. Stiffnesses increased for both types of mixture as cement content increased but decreased on incorporation of crumb rubber. Energy absorption capacity was inversely related to stiffness. Mesostructural investigation revealed that the cracks were propagated through the rubber particles for all cement contents.

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Section: Effect Of Cement Content On Failure Patternssupporting

confidence: 61%

Section: Overall Discussion Regarding Fracture Mechanismmentioning

confidence: 90%

Section: Overall Discussion Regarding Fracture Mechanismmentioning

confidence: 99%

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Effect of cementation level on performance of rubberized cement-stabilized aggregate mixtures

2016

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“…The first method is to generate aggregates by randomly throwing the geometries [11,12,13,14], and the other method is to regenerate the original structure based on the tomography of concrete [15,16,17]. The second issue is to calculate the built up model, and many methods have been adopted, such as traditional finite element method [18,19], the lattice model [20,21,22], the homogeneous model (such as meso-element equivalent method) [23,24,25], the extended finite element method [26,27], and the scaled boundary finite element method [28,29,30]. The discrete element methods are also considered, such as the particle flow method [31,32,33] and the rigid-body-spring method [34,35].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Inner Friction on Concrete Fracture Behavior under Biaxial Compression: A 3D Mesostructure Study

Huang

Sun

2019

Materials

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The mechanical behavior of concrete under biaxial loading condition (especially biaxial compression) is one of the most important indexes to evaluate the quality of concrete. To study the mechanical behavior of concrete under biaxial compression at mesoscale, we adopted our recently developed 3D numerical model based on Voronoi tessellation and cohesive elements. A constitutive model considering the friction effect is used in the model to characterize the fracture behavior of all potential fracture surfaces inside the concrete. A series of numerical experiments with different biaxial compression stress ratios were carried out. It was found that with the increase of the biaxial compression ratio, the proportion of energy increment caused by friction stress increases. The effect of inner friction coefficient on the biaxial relative strength was also investigated, and this kind of study is hard to be carried out through laboratory experiments. The results show that the inner friction coefficient has a great influence on the biaxial relative strength of concrete, and there is a positive correlation between these two parameters. Based on the above rules, a conservative biaxial relative compression strength envelope is obtained by setting the inner friction coefficient as zero.

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“…The study concluded that waste rubber fiber can be conveniently used as a material to improve the ductility and impact resistance of concrete, and also demonstrates that the silica fume improved the impact resistance and reduces the ductility of rubberized concrete. Duarte et al (2015) carried out a numerical procedure to characterize the mechanical behaviour of rubberized concrete, the splitting tensile strength test was particularly considered. The research used MAT-LAB image processing to obtain the model geometry and the distribution of rubber particles within the concrete matrix.…”

Section: Introductionmentioning

confidence: 99%

The Impact of Rubber Crumb on the Mechanical and Chemical Properties of Concrete

Akinyele

Salim

Kupolati

2016

Engineering Structures and Technologies

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Various works have been carried out on both the physical and mechanical properties of rubberized concrete in previous research. But the chemical composition of rubberized concrete has not been fully investigated. The scanning electron microscopy (SEM) and energy-dispersive x-ray spectrum (EDX) analysis were used to determine the element composition and the peak intensity of chemical elements in the waste rubber concrete. The SEM and EDX analysis results showed that, ferrous iron, oxygen, calcium, and silicon were the dominant elements, and these elements reduced as more waste rubber were added to the concrete. Carbon and sulphur elements increased as rubber crumbs were added to the rubberized concrete. The work concluded that the presence of rubber crumb in the concrete samples contributed to both mechanical and chemical changes in the property of rubberized concrete.

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Mechanical characterization of rubberized concrete using an image-processing/XFEM coupled procedure

Cited by 43 publications

References 10 publications

Effect of cementation level on performance of rubberized cement-stabilized aggregate mixtures

Effect of cementation level on performance of rubberized cement-stabilized aggregate mixtures

The Effect of Inner Friction on Concrete Fracture Behavior under Biaxial Compression: A 3D Mesostructure Study

The Impact of Rubber Crumb on the Mechanical and Chemical Properties of Concrete

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