Study on mix proportion design and performance of casting asphalt concrete composed of natural gravel aggregate

In the mix proportion design of casting asphalt concrete,alkaline and broken artificial stone of the aggregate of asphalt concrete is taken to guarantee adhesion between aggregate and asphalt as well as reliability of the core.when natural gravel aggregate is applied in configurating asphalt concrete,mix proportion of material and water stability attract more and more attention in engineering field.This paper used natural gravel which is widely distributed in Xinjiang to carry out.It indicates when asphalt content is 8.3% to 8.6%,mineral filler content is 0% to 14% and grading index is 0.33 or 0.34 in Ding Purong formula,asphalt concrete using natural gravel aggregate configuration has good fluidity and also accords with the requirement of water stability for asphalt concrete.