Research Of The Application Of Pavement Base Material With Phosphorous Slag(Phosphogypsum)

Low cost roads have always been the research focus of the road engineering field. Resource recycling and ecological environment construction are also hot topics of current study. Under the circumstances this article, according to the physical and chemical features of industrial slag, explores to construct the classification system of industrial slag as pavement base material based on deep investigation for industrial slag discharge of GuiZhou. On the basis of physical and chemical features of industrial slag and interaction between them, science of binding materials and mechanisms of strength formation of semi-rigid base material, and the classification system of industrial slag, this paper preliminarily designs composite compound solution for industrial slag as pavement base materials. It also brings up optimal mixture proportion by studying the use amount of phosphorous slag, the proportion between phosphorous slag and gravel and the effect on the strength of the above base materials given by the binder composition. Finally it discusses the environmental effect of industrial slag as the pavement base material. The study shows that it is possible to compose the pavement base materials meeting the requirements by optimum design for mixture proportion of industrial slag such as fly ash, phosphogypsum and phosphorous slag, which can also replace cement stabilized macadam and lime-fly ash aggregate to cover pavement base. This paper establishes concrete basis for heavily using fly ash, phosphogypsum and phosphorous slag as pavement base material and has the prominent social economic benefit and widely application prospect.