The effect of flakiness and elongation index on the compressive and splitting tensile strength of cement treated aggregate crushed stone

Abstract

The reality of road construction shows that, for routes with unfavorable mining conditions, the aggregate crushed stone bases for road pavement are often unstable, unable to meet the requirements for load-bearing capacity and load distribution to lower layers, leading to various types of deformation and damage on the road surface, such as rutting, cracks, and potholes. Using cement treated aggregate crushed stone bases for road pavement is an effective solution to address this problem. This article presents the research results on the effect of the flakiness and elongation index on the compressive and splitting tensile strength of 5% cement treated aggregate crushed stone. The study shows that when the flakiness and elongation index increased from 14% to 22%, the compressive and splitting tensile strength at 14 days of the age of 5% cement treated aggregate crushed stone decreased by 36,54% and 31,02%, respectively. The 5% cement treated aggregate crushed stone with flakiness and elongation index ranging from 18% to 22%, as studied in this research, still meets the strength requirements for use as pavement base course for class 3 roads and lower.