Correlation between the Polished Stone Value(psv) with other Physical and Mechanical Properties of Aggregates

Physical and mechanical properties of aggregates are major parameters to determine the utilization of aggregates in road pavement surfacing. There are different physical and mechanical standard tests mainly experimental that evaluate aggregates. These tests describe different aspects such as geometric characteristics, strength and durability of aggregates. The quality control of stone materials in service conditions are possible by some mechanical tests. Studies carried out on characteristics of road construction aggregates show that there is a significant relationship between physical and mechanical properties of aggregates. However, majority of research works in this field have not exactly specified the type of relationship. In this paper, in order to determine the relationship between aggregate characteristics and evaluate the correlation between these characteristics, samples of aggregates from different quarries including carbonate, sandstone and igneous rocks were collected. Then, some physical and mechanical laboratory tests including specific gravity, impact value, Los Angeles abrasion value, sodium sulfate soundness and polished stone value (PSV) were carried out on selected aggregate samples. Data analysis shows that the impact value has a linear relationship with Los Angeles abrasion value, significantly. This relationship in the group consisting of igneous rocks and sandstone is stronger than other groups. Based on more assessments in this research work, regarding the relationship between the polished stone value with other physical and mechanical parameters, it was found that, PSV with specific gravity has a linear relationship in igneous rocks family. Therefore, increasing the specific gravity will result in reduced polished stone value. In broader group of aggregates consisting of igneous rocks and sandstone, a linear relationship is established between the polished stone value and combination of specific gravity and sodium sulfate soundness.