Comparative Study on Effect of Fine aggregates Grading and Shape on Fresh and Hardened Concrete Properties

Effect of grading and shape of fine aggregates on properties of concrete has been studied comparatively, at this paper. Aggregates in concrete occupy 60 to 80 percent’s of the volume. It is frequently looked upon as inert filler and therefore much attention is required to be paid to its effectson properties of concrete. This paper mainly presents the key properties of fresh and hardened concrete with different kinds of fine aggregates. Concrete mixes were prepared in two different series to study the influence of fine aggregates grading and shape on concrete properties, comparatively. Series І concrete mixes were analyzed changing the standard fine aggregates grading with constant modulus of fineness. In series П specimens, concrete mixes contain different percentages of crushed sand and natural river sand (0%, 25%, 50%, 75% and 100%) were investigated. The slump and unit weight tests were achieved in all specimens. The all hardened concrete mixes were tested for compressive strength, splitting tensile strength, water permeability and water absorption. Both grading and surface shape and texture of fine aggregates influence the conventional concrete properties in fresh and hardened states. But, fresh concrete properties are more affected by fine aggregates shape and texture whereas the hardened concrete properties are more affected by fine aggregates grading, comparatively.

کلیدواژه ها:

Conventional Concrete ، Fine aggregate Grading ، Fine aggregate Shape ، Fresh properties ، Hardened properties