Effects of Rubber Particle Content and Fineness on the Impermeability and Frost-Salt Resistance of Road Cement Concrete

Abstract

The sand replacement rate and fineness modulus of rubber particles are considered as variables in this study. The effects of the fine aggregate content and fineness of the rubber particles on the impermeability and frost-salt resistance of road cement concrete are investigated through a two-factor and four-level orthogonal test. This study shows that the rubber particles used in the concrete effectively improve the resistance of the concrete to chloride ion permeability and frost salt. The replacement rate and fineness modulus of the rubber particles significantly influence the resistance to chloride ion permeability of the concrete. The replacement rate of rubber particles has a particularly significant influence and the fineness modulus has a significant influence on frost-salt resistance of concrete. When adding the fineness modulus whose fineness modulus is 1.38 and the 40% dosage of the fine aggregate (volume ratio) into concrete, the electric flux for the concrete to chloride ion penetration resistance is 527 C, and the salt-resistant level is F500.