PERFORMANCE OF RECYCLED COARSE AGGREGATE (RCA) CONCRETE IN NORMAL AND ACIDIC ENVIRONMENT

Publication Date : 01/02/2017

Author(s) :

Musa, N.M., Ma'aruf, A, Umar, B.A.

Volume/Issue :

Volume 12

Issue 1

(02 - 2017)

Abstract :

This paper presents the results of an experimental investigation carried out to study the effect of acidic environ-ment on recycled coarse aggregate (RCA) concrete, in which the natural coarse aggregates were replaced by weight with 0%, 50% and 100% RCA. To study the performance of RCA concrete in acidic environment, com-pressive strength test at 7, 14 and 28 days before immersion in acid, Weight loss assessment after immersion in acids at interval of 7 days and compressive strength loss assessment after immersion in 5% hydrochloric acid (Hcl) and sulfuric acid (H2SO4) mediums at interval of 7 days for 28 days were carried out. The results indicate that the compressive strength and weight decrease with increase in RCA replacements. Generally, specimens containing 50% RCA replacement shows a comparable performance with control specimens in acidic environ-ment.

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