Improving Asphalt Concrete Waste Materials to Replace Crushed Stone. Case Study: Asphalt Concrete Waste on Road 418, Nga Mae–Tha Sap Route. Pattani

Abstract

This research studies the properties of asphalt residue of concrete road, Road 418, Nga Mae–Tha Sap Road, Nong Chik District, Pattani Province. Improve asphalt concrete waste material to be used as a substitute for crushed stone. Experiment by dividing the ratio between Asphalt concrete waste and mixed stone in 6 ratios, namely 100:0, 70:30, 60:40, 50:50, 40:60, and 30:70 Test properties with Sieve Analysis, Atterberg Limits, Abrasion Test, Compaction Test, and California Bearing Ratio Test found that the mixture ratio was 70:30 with mixed sizes, in the Grade B range, with a Plasticity Index (PI) of Non, wear and tear at 53.7 percent and a C.B.R. At 36.5 percent, which is the sample There's a good mix of sizes. It has suitable properties for use as a road foundation layer according to the standard THL-M 205/1989, making this ratio the best ratio. According to standards from the Department of Highways In experimental groundwork, the California Bearing Ratio Test must have a value ≥ 80 percent. When laterite soil is mixed with asphalt concrete waste, the California Bearing Ratio Test value increases from 30.3 percent to 36.5 percent, equivalent to approximately 20.5 percent. The values obtained from the experiment did not reach the criteria according to the standards of the Department of Highways. Therefore, it cannot be used as a substitute for crushed stone. However, it can be used for pavement foundation work.