Effectiveness of surface treatment on rubber particles towards compressive strength of rubber concrete: A numerical study on rubber-cement interface

Kang, Juntao; Liu, Yanshuo; Yuan, Jiale; Chen, Chunpeng; Wang, Lei; Yu, Zechuan

doi:10.1016/j.conbuildmat.2022.128820

Cited by 25 publications

(3 citation statements)

References 32 publications

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“…The reason for this may be that with the increase in shear strain when the rubber content is great, the rubber particles in the mixture are mainly deformed after the force, and the whole sample is greatly affected by the damping of the rubber particles so that the damping ratio rises slowly. When the rubber content is small, the cementation state between the original particles in the sample is destroyed, the rubber particles are deformed by force, and staggered friction between the particles is gradually generated [51,52]. The particles in the sample are rearranged and a certain amount of energy is consumed.…”

Section: Effect Of the Rubber Contentmentioning

confidence: 99%

Experimental Static and Dynamic Characteristics of Recycled Waste Tire Rubber Particle–Cement–Sand Composite Soil

Zhang

et al. 2022

Materials

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To investigate the static and dynamic characteristics of rubber–sand composite soil (RS soil) reinforced with cement, a series of triaxial compression tests and resonant column tests was performed by considering the influence of rubber content (10%, 20%, 30%, 40%, and 50%), cement content (0, 1.5, 2.5, 3.5 and 4.0 g/100 mL), and effective consolidation confining pressure (50, 100, and 150 kPa). Compared with the RS soil, the addition of cement significantly improved the shear strength of a cement–rubber–sand composite soil (RCS soil), based on an undrained shear test. The increase in cement content not only makes the elastic modulus and cohesion of the RCS soil increase but also reduces the internal friction angle of the RCS soil. With the increase in rubber content, the failure of the RCS soil samples changes from strain-softening to hardening, and the prediction equation of the initial elastic modulus of the RCS soil is given herein when the recommended cement content is 3.5 g/100 mL. The effects of rubber content, cement content, and effective confining pressure on the dynamic shear modulus and damping ratio of the RCS soil were studied via the resonant column test. The test results show that the increase in rubber content slows down the modulus attenuation of the RCS soil, but increases its damping ratio. The test results also show that the increase in cement content makes the bonding force between particles greater so that the modulus attenuation of the RCS soil becomes slower and the damping ratio is reduced. At the same time, according to the change rule of the maximum dynamic shear modulus of the RCS soil with the rubber content, when the recommended cement content is 3.5 g/100 mL, an empirical formula and recommended value of the shear modulus Gmax of the RCS soil are proposed.

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Section: Effect Of the Rubber Contentmentioning

confidence: 99%

Experimental Static and Dynamic Characteristics of Recycled Waste Tire Rubber Particle–Cement–Sand Composite Soil

Zhang

et al. 2022

Materials

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“…Concrete pavements are typically damaged by cracking owing to excessive bending and tensile stresses, as concrete itself is a material with good compressive properties and poor fracture properties. Therefore, numerous researchers have explored methods to improve the mechanics properties of RRC [19][20][21]. One effective method to improve the fracture properties of concrete is to add fibres within the concrete [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Combined Effects of Steel and Glass Fibres on the Fracture Performance of Recycled Rubber Concrete

Li,

Pan,

Zhen

et al. 2024

Buildings

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As an environmentally friendly construction material, recycled rubber concrete (RRC) is commonly used as a road material owing to its excellent flexural strength and crack resistance. Previous studies have shown that the addition of fibres is an effective method for improving the crack resistance of concrete. The purpose of this study is to investigate the fracture performance of RRC reinforced with steel fibres (SFs) and glass fibres (GFs). A total of 28 RRC mixtures were prepared. The results of the fracture test showed that the addition of SFs and GFs significantly enhanced the RRC fracture performance. The maximum increases or decreases in flexural strength, brittleness coefficient, fracture energy, initial fracture toughness, and unstable fracture toughness were 64.9, −34.6, 775.6, 92.0, and 118.4%, respectively. The ideal GF content is usually in the range of 0.4–0.6% and decreases with increasing SF content. In addition, scanning electron microscope (SEM) tests were conducted to explore the mechanism of the effect of hybrid fibres on RRC at a microscopic level. The results show that SFs were always pulled out, while GFs were pulled apart at the initial defects. At the same time, excessive GFs caused more initial defects. These results are expected to provide theoretical direction and experimental support for the practical application of hybrid fibre-reinforced recycled rubber concrete (HFRRRC).

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“…At present, due to the unreasonable disposal of a large number of waste tires, "black pollution", waste of resources, and safety problems are becoming more and more serious [2]. Fortunately, mixing waste tire rubber particles into normal cement-based materials to prepare rubber cement composites/rubber cement-based materials can become a feasible method for recycling waste tire rubber and protecting the environment [3]. Some previous studies have shown that rubber-cement composites are green and sustainable impact-resistant cement-based materials, which have a broad application prospect in earthquake resistance [4], bridge piers [5], and roads [6] because of their outstanding cushioning energy dissipation and anti-fatigue properties.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on SHPB cyclic impact of rubber-cement composite with different confine modes

2023

Archives of Civil Engineering

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To promote the application of rubber-cement composites as the main bearing structure and key components in practical engineering under frequent dynamic disturbances, in this work, the split Hopkinson pressure bar (SHPB) cyclic impact tests of rubber-cement composite specimens with four different confine modes were carried out in which the impact load increased sequentially. The relationship between average strain rate, ultimate strain and impact times and the relationship between peak stress, damage energy, ultimate strain and incident energy were analyzed. The results showed that the appropriate confine reinforcement treatment can make rubber-cement composite give full play to its deformation ability when it was completely damaged. Carbon fiber-reinforced polymer (CFRP) sheet and steel cylinder can work together with the rubber-cement composite matrix to resist impact load, which effectively improves the structural strength, damage fracture energy, and cyclic impact resistance of the rubber-cement composite. Finally, based on the effect difference of confine modes, the simplified plane force models of rubber-cement composite specimens with four different confine modes were established, which clearly revealed the completely different impact resistance mechanism of the rubber-cement composites with different constraints under cyclic impact loading.

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Effectiveness of surface treatment on rubber particles towards compressive strength of rubber concrete: A numerical study on rubber-cement interface

Cited by 25 publications

References 32 publications

Experimental Static and Dynamic Characteristics of Recycled Waste Tire Rubber Particle–Cement–Sand Composite Soil

Experimental Static and Dynamic Characteristics of Recycled Waste Tire Rubber Particle–Cement–Sand Composite Soil

Combined Effects of Steel and Glass Fibres on the Fracture Performance of Recycled Rubber Concrete

Experimental study on SHPB cyclic impact of rubber-cement composite with different confine modes

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