Investigation of the effects of aggregate textural properties on compressive strength (CS) and ultrasonic pulse velocity (UPV) of concrete

Abstract

Aggregate is the most volume covering component in concrete. The strength and durability properties of the aggregate can affect the hardened and fresh concrete properties. Apart from the strength and durability properties, the textural properties of the aggregate can also affect the hardened concrete properties. In this study, the effects of aggregate textural properties on hardened concrete properties were investigated. Concrete samples were produced by using two different types of aggregates obtained from crushers with different technical characteristics and river aggregates. The textural properties of the aggregates were determined by the analysis of cut hardened concrete samples by image analysis method. After analyzing the textural properties such as aspect ratio, roundness, width and length of the aggregates, the total aggregate area within the cross-sectional area was determined by image analysis method. It has been determined that concrete compressive strength increases with the increase of aggregate aspect ratio and roundness. As a result, it was determined that the increase in aggregate surface roughness caused an increase in concrete compressive strength and ultrasonic pulse velocity.