Influence of fiber properties on abrasion resistance of recycled aggregate concrete: Length, volume fraction, and types of fibers

Deng, Qi; Zhang, Rongli; Li, Chun; Duan, Zhenhua

doi:10.1016/j.conbuildmat.2022.129750

Cited by 20 publications

(4 citation statements)

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“…Direct fracture of aggregates was observed by Xiao et al for the concrete specimens with complete replacement of coarse aggregates with recycled aggregates 40 . Reduction in the performance of concrete specimens with the addition of RCA was compensated with the addition of polyethylene fiber 41 …”

Section: Introductionmentioning

confidence: 91%

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Performance assessment of recycled aggregate concrete and its variability

Gaurav

Kotoky

Jittin

et al. 2023

Structural Concrete

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The use of recycled aggregate improves waste management and is a crucial step toward the sustainable development of the concrete industry. Hence, this paper presents the experimental investigation to determine the mechanical properties of concrete with recycled concrete aggregates as the selective substitution for natural aggregates. The slump was observed to decrease by replacing natural coarse aggregates with recycled concrete aggregates. Compressive strength of about 40 MPa was achieved after 56 days of curing with the utilization of 100% recycled concrete aggregates. Besides, a reduction in the splitting tensile strength of 14% was observed due to the incorporation of recycled concrete aggregates. The statistical techniques use various probability distribution models such as Gamma, Lognormal, Weibull, and Normal distributions. Amongst the considered functions, lognormal and Weibull distributions best represent the experimentally obtained compressive strength of concrete with 100% natural aggregates and 50% recycled concrete aggregates, respectively. However, for concrete with 100% recycled aggregates, Weibull distribution represent compressive strength after 28 days of curing, and lognormal distribution is given the best fit for the compressive after 56 days of curing. In the case of split tensile strength, lognormal distribution provided the best representation after 56 days of curing for all specimens.

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Section: Introductionmentioning

confidence: 91%

“…40 Reduction in the performance of concrete specimens with the addition of RCA was compensated with the addition of polyethylene fiber. 41…”

Section: Introductionmentioning

confidence: 99%

Performance assessment of recycled aggregate concrete and its variability

Gaurav

Kotoky

Jittin

et al. 2023

Structural Concrete

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“…Researchers commonly enhance the wear resistance of concrete pavement through means such as improving aggregate performance [ 3 , 4 , 5 ], surface treatments [ 6 , 7 ], adding fibers [ 8 , 9 , 10 ], and incorporating supplementary cementitious materials [ 11 , 12 ]. Among existing methods, the addition of SF is a relatively practical and environmentally friendly approach.…”

Section: Introductionmentioning

confidence: 99%

A Study on the Properties of Composite Modified Mortar with Styrene–Butadiene Rubber Latex and Silica Fume

Yan,

Wang,

et al. 2024

Polymers

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To solve the problem of the poor abrasion resistance of concrete pavement surface mortar, this study substituted cement with equal amounts of styrene–butadiene rubber (SBR) latex and silica fume (SF) to investigate the effects of organic/inorganic material composite modification on the fluidity, drying shrinkage, mechanical properties, and abrasion resistance of cement mortar. Also in this study, the microstructure, product, and pore structure characteristics of the composite modified cement mortar were investigated using scanning electron microscope (SEM), X-Ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), and the Brunauer–Emmett–Teller (BET) method. This research found that the sole substitution of SF negatively impacted the mortar’s fluidity and drying shrinkage yet enhanced its mechanical strength and abrasion resistance; the incorporation of SBR latex improved fluidity, reduced shrinkage, and increased flexural strength but adversely affected the compressive strength of the mortar. Additionally, the enhancement of the mortar’s abrasion resistance with SBR latex was significantly greater than that with SF. When SBR latex and SF were used together as substitutes, the latex struggled to offset the negative impact of SF on mortar fluidity but effectively reduced shrinkage; SF compensated for the detrimental effect of the latex on compressive strength. Moreover, the primary role in enhancing the mortar’s abrasion resistance was played by the latex. Microscopic tests showed that SBR latex and SF could increase the content of calcium silicate hydrate (C-S-H) gel, inhibit the formation of ettringite (AFt) and reduce carbonation, refine the pore size of cement mortar, and effectively improve the microstructure of mortar.

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“…The annual consumption of concrete is estimated to exceed 10 billion cubic meters [ 1 ], leading to a shortage of natural resources like sand and gravel. The over-exploitation of these natural resources and resulting environmental damage have become critical and increasingly severe problems that must be solved urgently [ 2 ]. At the same time, the demolition of buildings, bridges, and hydraulic structures generates a substantial amount of construction waste, constituting 50% of the total urban waste [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Calculation Method for the Cracking Resistance and Bearing Performance of SFRAC Beams

Zhu

Liu

2023

Materials

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The utilization of recycled aggregate (RCA) in preparing recycled concrete (RAC) is an effective measure to solve the increase in construction waste. Furthermore, applying RAC to flexural members is a viable practice. The addition of steel fiber to RAC to prepare steel fiber recycled concrete (SFRAC) solves the performance deterioration caused by the recycled aggregate, so it is necessary to study the effects of the recycled aggregate replacement rate and fiber–volume ratio on the crack resistance and bending performance of SFRAC beams. In this study, 13 beams were designed and manufactured, with the water–cement ratio, recycled aggregate replacement rate, and fiber–volume ratio as the primary variables, and the cracking moment and ultimate moment of the SFRAC beams were systematically studied. The results show that the cracking and ultimate moments of the SFRAC beams increased with decreases in the water–cement ratio or with increases in the fiber–volume ratio and were unaffected by the replacement rate of recycled aggregates. Based on the experimental results and theoretical analysis, a calculation model and formula for the cracking moment were established. The ultimate bearing capacity of SFRAC beams can be accurately determined using the ACI 318 and ACI 544 standards. The research results serve as a valuable reference for the design of SFRAC beams, effectively address the issue of performance degradation in RAC structural members, and promote the use of green building materials.

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Influence of fiber properties on abrasion resistance of recycled aggregate concrete: Length, volume fraction, and types of fibers

Cited by 20 publications

References 50 publications

Performance assessment of recycled aggregate concrete and its variability

Performance assessment of recycled aggregate concrete and its variability

A Study on the Properties of Composite Modified Mortar with Styrene–Butadiene Rubber Latex and Silica Fume

Calculation Method for the Cracking Resistance and Bearing Performance of SFRAC Beams

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