River Gravel as Alternative Aggregates in Hot mix Asphalt Production

Abstract

The world population continue to grow so the demand for more and reliable infrastructure, therefore researches into new and innovative materials are continually advancing. This research title river gravel as alternative aggregates in hot mix asphalt production was aimed determining the durability of river gravels (aggregates) as compared to crushed stone (aggregates) in hot mix asphalt production and uses. Samples of the aforementioned materials were obtained and process according to BS 812 for asphalt production and process. Various laboratories test were conducted on the river gravel, the bitumen and the resulting asphalt obtained using standard laboratory equipment in MSSR Julius Berger Nigeria Plc located in Abuja Nigeria. The aggregates were sieved and graded proportionately to obtain the required aggregate gradation in accordance to Nigerian General Specification for Road and Bridges (1999). Hot Mix Asphalt was produced with each at temperature ranging from 150C to 165 C, and the optimum bitumen content values for river gravel hot mix asphalt was at 6.0% and has a stability of 1,550(KN) which shows agreement with the standard for hot mix asphalt production.