The Research Of The Fiber-reinforced Asphalt Chip Used For Asphalt Pavement Preventive Maintenance

With the increasing traffic volume and traffic load, the road began to appear many earlydisease, fiber reinforced chip seal can quickly and effectively restore the road surface andimprove road performance, extend the life of the road, this preventive maintenancetechnology is gradually beingwidely used, but due to the introduction of domestic time isshorter, with mix proportion research and road performance evaluation rarely. In Tangshanfiber asphalt pavement surface physical works as the basis, combined with the natural climaticconditions and the traffic environment, with indoor and outdoor experiments and theoreticalanalysis, The proposed The multi-target mixture ratio design method of fiber reinforced chipseal,the establishment of road performance evaluation system for the promotion andapplication of this technology in our country to provide theoretical support.This article in view of the special structure of the fiber reinforced chip seal of specialstructure, ombining with the experience at home and abroad,Through Raw materialscompatibility test and performance testproposed the technical performance requirement ofasphalt binder, gravel, and fiber, And combining with the tangshan region supplies of rawmaterials to select raw materials，From raw material of fiber reinforced chip seal coat dosageadopt hierarchical design research，Combined with engineering of entities in tangshan，On thebasis of theoretical research and experimental analysis for mix proportion design methodresearch。and raw material supply situation combined with the Tangshan area, the rawmaterialspreferred; fiber reinforced chip seal raw material usage, system-level design researchraw material usage, system-level design research, combined with the physical works in theTangshan region, on the basis of theoretical study and experimental analysis Mix DesignMethod: first, based on the entitythe project moved to Cao line Preventive Maintenancesections of broken pavement type, traffic, environment and climatic conditions, initiallyidentified the range of the amount of raw materials, simultaneous analysis of the film of fiberasphalt for road performance, the introduction of fiber mass content of K values as controltargets,study the value of K under the the fiber asphalt thin-film tensile strength and shear strength variation, determine the best fiber mass content of K value; once again, consideringthe the fiber asphalt pavement surface construction technology, in the best quality contentvalue of Kbased on, and then to stick to the amount of sand as a control indicator test, todetermine the appropriate amount of Tangshan modified asphalt emulsion and fiber; the lastcleaning test for detection of different amount of gravel fiber asphalt chip seal layermontmorillonite rate, the final wasout for Tangshan entity works the best ratio of rawmaterials, multi-index Mix Design Method.In addition, This article has established the fiber reinforced chip seal coat performanceevaluation index，At the same time The construction key technology were studied，Construction quality control method is proposed.