Study On The Technology Of AH Cold Patch Asphalt Mixture

The Cold Patch Asphalt Mixture of pavement has entered into Chinese market over ten years. But there are big defects in high and low temperature performance, water stability and mechanical property; and there is no unanimous pavement performance evaluation system. It can't eliminate disease and only services as temporary measures for pavement disease treatment. This caused great waste of resource, and has some negative effects on the pavement standard maintaining, and then affect the highway service level.This subject is based on the condition of existing roads and minor repairing in Anhui province. The pavement performance evaluation system at home and abroad of typical Cold Patch Asphalt Mixture are summarized and analyzed according to its unique natural geography and climate characteristics; the pavement performance of Cold Patch Asphalt Mixture is studied systematically to several representative Cold Patch Asphalt Mixture selected in the country through the laboratory tests of adhesion, construction workability, initial Marshall stability, molding Marshall stability, remnants stability, freeze-thaw splitting and cohesiveness; and the strength formation mechanism and influencing factors of Cold Patch Asphalt Mixture are analyzed.On the basis of research for cold repair material in domestic, a composite polymer modifier is introduced through blending and contrasting test repeatedly to many diluents, modifiers and other additives. Through optimal proportioning design of the matrix asphalt and certain aggregate grading, a new and durable Cold Patch Asphalt Mixture (Abbreviation:AH Cold Patch Asphalt Mixture) which is suitable for the pavement pit mending of aspect concrete pavement and cement concrete pavement is developed; The evaluation system of key index, forming time of final shaping molding strength and applicable scopes of three types of AH Cold Patch Asphalt Mixture'are proposed; and cost analysis is made at the same time. The results indicate that: there is approximately 10% cheaper to produce normal temperature AH Cold Patch Asphalt Mixture than similar products; and there is approximately 20% cheaper to produce low temperature AH Cold Patch Asphalt Mixture than similar products.