Experimental study of flexible pavement containing sandstone waste as fine aggregate

- Continuous d evelopment of road networks require a large quantity of natural resources, which is a critical challenge in civil engineering. Because of the large-scale road building, there is a high demand for aggregate, resulting in a lot of blasting, quarrying, crushing, and so on. On the other side, industrial byproducts and locally accessible materials pose environmental and landfill issues, but they may be used in road building. The marshall mix characteristics of hot mix asphalt incorporating sandstone waste as a substitute for fine aggregate was examined in this experimental investigation. In this experimental work, sandstone waste in different percentages including 0%, 25%, 50%, 75% and 100% were used. Several tests were conducted on flexible pavement including los angeles abrasion, aggregate impact value, aggregate crushing test, Shape test and Marshall stability test. Raising the percentage replacement from 0% to 25%, marshall stability increases than reduced on increasing sandstone waste. Maximum strength was observed when fine aggregate was substituted with sandstone waste at 25%. It was also observed that at up to 50% replacement of fine aggregate with sandstone waste fulfilled the whole requirement of the DBM layer of pavement according to MORTH Specification and can be used in the pavement as an alternative to fine aggregate. It reduces the cost of material and decrease environmental problem. It can also be used on the pavement where the traffic load is less.