Abstract:
In this paper, compressive and splitting tensile strengths, modulus of elasticity and
steel rebar-concrete bond strength of lightweight aggregate concretes (LWAC) produced at
0.40 w/c with sand and mixture of crushed stone and lightweight fly ash coarse aggregates are
presented. Lightweight fly ash aggregates (LWA), plain (LC) and reinforced with 0.1% (L1P)
and 0.5% (L5P) crumb rubber and0.1% (L1F) polypropylene fiber are utilized. Test results
revealed that the compressive strength of all LWAC conformed to the limitation for structural
use whereas a reduction in density up to 20% was achieved. Whereas the mechanical
properties decreased with the use of lightweight aggregates, some increases were observed for
the steel-concrete bond strength.
