Internal curing of Class-F fly-ash concrete using high-volume roof-tile waste aggregate

Strength Development and Durability of Concrete Containing Recycled Roof Tile Aggregate

“…Test data indicate lower modulus of elasticity of concrete containing recycled roof tile aggregate than the normal aggregate concrete mix. Studies by Bui et al [6] indicates that the partial replacement of normal coarse aggregate by recycled roof tile aggregate at a 40% replacement ratio by volume decreases modulus of elasticity of concrete by 4.9-12.8%. This trend was also reported in a published paper by Tobita et al [7], which demonstrated that modulus of elasticity of clay roof tile aggregate concrete was significantly lower than that of normal aggregate concrete.…”

“…For the preliminary investigation, the physical and mechanical properties of both fine and coarse recycled roof tile aggregate were determined, which provides opportunity to identify the main differences between recycled roof tile aggregate and normal crushed stone aggregate. recycled roof tile aggregate due to the effect of internal curing by the moisture supply of aggregate particles to the surrounding cement paste [6]. Although the strength of recycled roof tile aggregate particles is usually lower than the normal crushed stone aggregate, compressive strength of concrete with roof tile aggregate is often similar to or larger than the normal crushed stone aggregate [7,8].…”

“…The use of waste clay tiles as a partial replacement of aggregate in concrete is one of the alternatives to the virgin aggregate [5]. It is reported that shrinkage of concrete is decreased by using recycled roof tile aggregate due to the effect of internal curing by the moisture supply of aggregate particles to the surrounding cement paste [6]. Although the strength of recycled roof tile aggregate recycled roof tile aggregate due to the effect of internal curing by the moisture supply of aggregate particles to the surrounding cement paste [6].…”

“…It is reported that shrinkage of concrete is decreased by using recycled roof tile aggregate due to the effect of internal curing by the moisture supply of aggregate particles to the surrounding cement paste [6]. Although the strength of recycled roof tile aggregate recycled roof tile aggregate due to the effect of internal curing by the moisture supply of aggregate particles to the surrounding cement paste [6]. Although the strength of recycled roof tile aggregate particles is usually lower than the normal crushed stone aggregate, compressive strength of concrete with roof tile aggregate is often similar to or larger than the normal crushed stone aggregate [7,8].…”

Studies on flexural behavior of reinforced concrete beams with copper slag and fly ash

“…But, the rate of gain of strength of all mixtures replaced with FA from 10 to 30% is higher than control mixes. The compressive strength of concrete with roof tiled waste aggregates increased up to 40% of class F FA replacement for cement due to improved the pore structure of concrete . 30% FA and 70% CS mix is optimum, which is used in sub base layers of the flexible pavements.…”