Engineering Properties and Application Prospects of Waste Rubber Tyre in Concrete Pavement Materials

Abstract

This paper aims to study the pedestrian pavement application of the green building material rubber concrete. As the majority of worn-out tyres are discarded in landfills in large masses, the looming threat over the environment is becoming more tangible. The "black pollution" waste tire rubber is mixed into the concrete, which not only solves the problem of black pollution, but also provides a new concrete material that is more resistant to cracking than the current concrete pavement for road construction. In order to study the applicability of rubber concrete pedestrian pavement, this paper uses the axial compressive strength test to measure the rubber content of rubber concrete suitable for use in pedestrian pavement. The rubber content is to replace 20 % of the volume of fine aggregate with rubber particles, and then the rubber with this mix ratio is used. Concrete flexural experiments were carried out to explore the mechanical properties of rubberized concrete. The results show that the mechanical properties of rubberized concrete meet the requirements of pavement construction, and the flexural strength is about 20 % higher than that of ordinary concrete of the same strength. In addition, the incorporation of rubber particles improves the cracking resistance of concrete as measured by early and long-term crack resistance experiments. The number of short-term cracking cracks is much smaller than that of ordinary concrete, and the long-term drying shrinkage rate is about 1/2 of that of conventional concrete. It can be seen that rubberized concrete not only meets the requirements of sustainable development, but also satisfied the mechanical and service performance of pavement construction.