Title: Crushed Bricks as Coarse Aggregate for Concrete

Author(s): M. A. Mansur, T. H. Wee, and S. C. Lee

Publication: Materials Journal

Volume: 96

Issue: 4

Appears on pages(s): 478-484

Keywords: coarse aggregates; concretes; creep; crushed brick; shrinkage; stiffness; strength; stress-strain relationship; workability

DOI: 10.14359/649

Date: 7/1/1999

Abstract:
The suitability of crushed clay bricks as coarse aggregate for concrete has been assessed by making a direct comparison of the basic properties with those of equivalent conventional concrete. Four basic mixes were chosen for crushed granite to achieve concrete with grades ranging from 30 to 60 MPa. The equivalent brick-aggregate concrete for each mix was obtained by replacing granite with an equal volume of crushed bricks; everything else remaining the same. Test results indicate that brick-aggregate concrete can attain the same compressive strength, a higher tensile strength, a lower drying shrinkage, and almost identical specific creep when compared to conventional concrete. However, it exhibits a substantially smaller elastic modulus. Also, the peak stress is reached at a much higher strain. An equation is presented to generate the complete stress-strain curve of brick and granite aggregate concretes with a good degree of accuracy.