Preparation And Performance Evaluation Of New Asphalt Anti-stripping Agent

With the rapid development of highway, the growing demand for qualityaggregate is needed, results that the storage of neutral to alkaline aggregate continuesto decline. While the acidic aggregate represented by granite is widely distributed inthe country, it has a large storage and the character of hardness and wear resistance. Ifthe problem on adhesion between the acidic aggregate and asphalt is solved, whichenable a large application in engineering, the matter of wear and skid resistant will besolved and engineering cost will be reduced, while many local related industries willbe developed.To solve the problem on the adhesion between asphalt and acidic aggregate, thethesis is based on the granite aggregate by using the Minitab software to designformula experiments for developing a new-type five-component anti-stripping agentA, whose formulation is screened by boiling method test and photoelectric method forpeeling rate of asphalt on aggregate surface to obtain the final one. Effects of doses ofanti-stripping agent A are analyzed, which affect on the water stability, the high andlow temperature properties as well as the adhesion of asphalt, so that an optimizeddosage will be determined; A popular item named B is compared on agingperformance of asphalt and properties of asphalt mixture.The results show that A changed the aggregative model of asphalt and thestructure of components. The level of adhesion between asphalt and aggregate isincreased to5from2, which means that the adhesion between asphalt and acidicaggregate is promoted; the residual stability of mixture is improved to87.9%from65.4%and TSR to78.5%from60.3%, which means that the water stability ofasphalt is promoted; low temperature crack resistance of mixture is advanced, as thebreaking strain in low temperature is increased from2338to3009. Anti-strippingagent A is the same as B on the result and A is better on high temperature stability.Results of the analysis on economic benefit show that A is cheaper than B. as itwill save31.1%cost on project extra charges.