Behavior of reinforced concrete beams using recycled aggregates and silica-fume admixtures strengthening with CFRP sheets

Abstract

ABSTRACT

Reinforced concrete structures using recycled aggregates are attracting the attention of many domestic and foreign researchers. In particular, in the present condition that natural aggregate sources are gradually exhausted, the land area for burying construction wastes is also shrinking progressively. Therefore, the reuse of construction waste needs more complete studies to have a scientific basis for the application. This paper presents the experimental results obtained from 04 reinforced concrete beams with dimensions of 200 × 300 × 1800 mm. One beam uses natural aggregate, and the 03 remaining beams use recycled aggregate. The beams use recycled aggregate at 30%, 50%, 70%, and 10% Silica-Fume rates. The beams are reinforced by CFRP sheet bonding. The relationship between load and displacement of each beam was determined through a three-point bending test. The experimental results allow analyzing and evaluating the bending  behavior of reinforced concrete beams using recycled concrete aggregates with Silica-Fume admixture strengthening with CFRP sheets.

Keywords: reinforced concrete beams; Silica-Fume; recycled concrete; CFRP sheet; strengthening.