Research Progress on Mechanical Properties and Frost Resistance of Rubber Recycled Concrete

The use of recycled waste tires and construction and demolition wastes as aggregates in concrete after treatment as required not only contributes to environmental sustainability, but also alleviates the growing demand for natural aggregates in concrete production. This paper focuses on the mechanical properties and frost resistance of rubberized recycled concrete, including the effects of rubber and recycled aggregates on the mechanical properties and frost resistance of concrete, as well as measures to improve the mechanical properties and frost resistance of rubberized recycled concrete. Existing studies show that the mechanical properties of concrete gradually decrease with the increase of rubber and recycled aggregate admixture. Due to the high number of defects in recycled aggregate, it has a negative effect on the frost resistance of concrete. Rubber particles have air-entraining properties and can be incorporated into concrete to enhance the frost resistance of concrete. The frost resistance of rubber recycled concrete can be improved by mixing appropriate amount of fiber, rubber or rubber modification treatment.