Study On The Preventive Maintenance Asphalt Pavement And Warm Mix Overlays Design In Heilongjiang

For treating diseases of asphalt pavement, our country mainly adopts the correcting maintenance to cure, being in progress just after diseases appeared and has to be maintained, which Not only waste a lot of manpower and material resources, but also affect both road service quality, shorten the road life.Based on the early disease investigation results of two highway asphalt pavement of HaSui HaTong in Heilongjiang Province,and carry out Highway matches composition and construction-controlled had insufficient at present. According Asphalt Pavement diseases of different kinds and types of preventive maintenance measures discussed scope of application and control effect, and considering the geographic location, environmental conditions, economic characteristics of Heilongjiang and recommended slurry seal, micro-surfacing, synchronous pavement surface, pouring and sealing, thin overlay and asphalt recycling asphalt pavement as the main preventive maintenance techniques of Heilongjiang province. According the damage degree of HaTong highway and the shortcomings of hot mix overlay mixture, taking warm mix overlay mixture as the best repair technology. use Laboratory tests to meet the test of performance and the design of pavement asphalt mixture mixing by the conditions of adding LQ-1106, and compared with the corresponding hot-mix technology. Experimental research shows that: when Warm Mix agent content 0.6% that mixture has a better pavement performance compared with hot mixture and the mix temperature is 135 ℃, the compaction temperature of 120 ℃ which reduced nearly 25 ℃ relative to the hot mixture. pavement performance test showed that add the right amount of warm mix agent, although there is no good to improve the low temperature cracking and high temperature rutting resistance, but able to maintain hot mix both the use of performance. and as warm mix temperature is relatively lower so there is a certain degree of reduction to the water stability, but l all the indexes meet to the highway asphalt pavement construction specification.Finally, checking the using performance of warm mix overlay mixture in natural environment by paving test road, discussing the actual production process of the production process, construction techniques, which turn out that the warm mix overlay mixtureis applicable to the highway preventive maintenance technology of similar environment as Heilongjiang.