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Gradually into the large and medium repair period of the early construction of the asphalt pavement , the traditional method is the old road excavation, re- construction of the new pavement . This will generate a lot of waste , not only occupy the land , pollute the environment , but also for the material itself , but also a tremendous waste of resources . Asphalt pavement cold recycling technology to reuse old asphalt pavement material , improve resource utilization , and protection of the ecological environment is an effective measures to meet the sustainable development law . Departure from the current research status and recyclable waste asphalt mix asphalt recycling and determination , to determine the gradation of the RAP by sieving . Meanwhile, used in the test of emulsified asphalt , cement, and aggregate performance evaluation. Further analysis of the emulsified asphalt cold recycling mix of strength formation mechanism . Orthogonal design method mix design, splitting strength , Marshall stability , flow value , compressive strength and porosity as the evaluation index , to determine the amount of cement mix , asphalt content , RAP dosage and total water consumption , a group of more excellent fit than the program ( program ) . The combination of economic and social benefits to consider , but also get a set of the better co-ordination than Option ( Option II ) . The comparative tests to finalize the program two optimal mixture ratio . Finally, the mixing ratio as a benchmark to program two , a fixed three factors , change another factor by comparing experimental mixes high and low temperature performance test . Drawn through a large number of experiments , the amount of cement to 3% , 3% asphalt content , the old material content is 70 % , and water consumption of 4% , cold recycled mixes with the design, the mixture has high strength and good high temperature performance, and can be applied to the grass-roots of high-grade highways .
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