COMPLETELY RECYCLABLE CONCRETE OF AGGREGATE-RECOVERY TYPE BY USING MICROWAVE HEATING

Abstract

To build up a resource recycling society, the environmental issue of concrete is approached comprehensively with a new technique using aggregate coating with dielectric material and microwave heating. The increase of concrete strength is achieved by 1.2 times using improved coating agent mixed properly with silica-fume and by-product powder. The recovery of high-quality aggregate can also be achieved with low energy by using microwave heating selectively for coating layer. In addition, about 90% of original aggregate can be recycled. Thus, the trade-off relationship between "strength of concrete" and "recovery of aggregates" and another trade-off between "energy consumption" and "aggregate quality" have been solved simultaneously.