STUDY ON THE EVALUATION AND SUPPRESSION OF ALKALI-SILIKA REACTION OF CONCRETE USING LOW-QUALITY RECYCLED AGGREGATE

Recycling system of concrete waste incurred from building demolition

Abstract

The purpose of this study is to increase the safe use of recycled aggregate concrete-Class M mixing with recycled aggregate class L and regular aggregate.
The evaluation results of recycled aggregate class L may differ depending on the sample pre-treatment method and testing method. Thus, it is necessary to perform quality control in combination with other tests.
As suppression methods, the specified value of total alkali amount can be satisfied by appropriate use of cement and admixture. In addition, the effect of alkali-silica reaction suppression by using a certain amount of fly ash type II was clearly recognized.