Effect of Silicone Waterproofing Agent on the Properties of Ceramic Recycled Aggregate Cement Mortar

Abstract

The ceramic waste were crushed and sieved to replace partially the sand to prepare cement mortar as aggregate, and different quality of silicone waterproofing agents were added to study the effects on the mechanical properties and water absorption under natural curing conditions. The experimental results indicated that through 28 days of natural curing, the flexural strength of ceramic recycled aggregate cement mortar was 1.18% higher than that of ordinary cement mortar, the compressive strength is 2.94% lower, the water absorption is 0.5% lower, which means the performance difference is not obvious. With the increasing amount of the silicone waterproofing agent, the compressive and flexural strength of the samples gradually decreased, and the water absorption decreased first and then increased. When the amount of waterproofing agent is 2%, the comprehensive performances of the sample were the best: the28-day flexural strength was 6.84 MPa, the compressive strength was 42.8MPa, and the water absorption was 4.66%.