Experimental Study on Waste Diatomite Modified Asphalt Mixture

Abstract

Used as beer filter aid, diatomite is low in utilization rate and environmentally-harmful after it lost its efficacy and was piled up in outdoor environment. In order to recycle waste diatomite, this study conducted heating curing for waste diatomite under 105 ℃ , so as to get rid of moisture, and then, through crushing, grinding, and heat activation under 300 ℃ , the processed diatomite was added to asphalt mixture in an appropriate amount. According to orthogonal experimental method, the effect of activated waste diatomite on asphalt mixture’s stability and durability was tested through mix design and performance test on a series of asphalt mixture, providing a new method and an approach for diatomite recycling.