With the development of the rubber and automobile industries, the growing amount of waste rubber, rubber products and angle scrap produced from scrap tires has raised ever-increasing environmental concern. The utilization of crumb rubber in concrete has attracted attention in…
With the development of the rubber and automobile industries, the growing amount of waste rubber, rubber products and angle scrap produced from scrap tires has raised ever-increasing environmental concern. The utilization of crumb rubber in concrete has attracted attention in the field of building materials in the past decades. Engineered cementitious composite (ECC) is a kind of composites reinforced with moderate fiber volume fraction, typically 2% by volume. Of special interest is the capability of ECC material to deform to high tensile strains, commonly over 3%, while maintaining very tight crack width. In this study the crumb rubber is used in ECC to partially replace fine silica sand, thus enhancing the greenness of ECC. Two particle size of crumb rubber (40CR and 80CR which means passing sieve is No.40 and No.80, respectively) is used in this research. Furthermore, three different dosages (0, 15%, 25% by volume replacing silica sand) for each crumb rubber size are mentioned in this study. The influence of crumb rubber on the ECC mechanical properties is revealed via compressive strength, flexural deformation and crack width. In this paper, it is found that the addition of crumb rubber into ECC decreases its first cracking strength with enhanced deformation capacity, meanwhile, the compressive strength decreases. The study results prove that it feasible to improve the some certain properties of ECC by replacing silica sand partially with crumb rubber, and also greatly promoting the greenness of ECC.