Influence of Steel Crystal Powder on Performance of Recycled Aggregate Concrete

摘要

This research paper presents the scientific attempt of a comparative study of recycled aggregate concrete (RAC) and conventional concrete with the incorporation of waste steel crystal powder. In this study, recycled aggregate concrete has been prepared using recycled coarse aggregate as a partial substitute (0-30%) of natural coarse aggregate which provides an efficient solution to the dilemma of valuable fertile landfilling and also saves natural aggregate resources. The objective of this study is to investigate the strength and abrasion resistance of concrete made with recycled coarse aggregate. The addition of waste steel crystal powder varying from 0% to 5% by weight (with 2.5% increment) of total mix and assess its suitability for use in a series of designated applications. The compressive and flexural strength results on the recycled coarse aggregate demonstrated higher percentage loss than natural aggregate but remained within the acceptable limits. An adverse effect observed when waste steel crystal powder added into the RAC as well as conventional concrete. The results arrived from abrasion tests reveals that wear depth with the replacement of coarse concrete aggregates is enhancing with the increase in the replacement ratio but decreases with increase in waste steel crystal powder in the mix. In general, addition of waste steel crystal powder can produce stronger recycle coarse aggregate concrete as compare to conventional coarse aggregate concrete.