关键词: 废瓷砖;再生骨料;骨料-水泥石界面;界面粘结

Abstract: Using waste ceramic tile as recycled coarse and fine aggregate to replace natural aggregate, effects of waste ceramic tile recycled aggregate on the performance of mortar and concrete were studied.Interfacial bonding properties of recycled aggregate and cement paste were measured by splitting test and bending test compared to natural aggregate.Results show that under the same mix proportion, waste tiles recycled aggregate improve compressive strength, reduce dry shrinkage and slump of concrete compared to natural aggregate.Under the same curing age condition, interfacial bond strength of different types of aggregate-cement pastes increase with the decrease of water to cement ratio.Under the same water cement ratio, the fracture strength and flexural strength at 28 d of the recycled aggregate-cement stone interface is higher than that of natural aggregate-cement stone interface.It is revealed that the performance of the interface between the recycled aggregate and cement paste is better than that of natural aggregate.

Key words: waste ceramic tile;recycled aggregate;aggregate-cement paste;interfacial bond