Advanced Materials Research Vol. 428

Abstract: In order to settle the influence easily on the foundation soil of high liquid limit red clay by free water in Southern hot and humid regions, and to increase the carrying capacity of the foundation soil, combined with ning (yuan) - dao (county) highway entity engineering, the thought was put forward that to construct the 20cm thick graded crushed rock subcrust (crushed run rock) on the top of the roadbed finish machining area, and analyze the strength forming principle of the crushed run rock subcrust ,and make the mix design, then get the optimum water content and the quality control standard, and propose the key technology of the crushed run rock subcrust’s construction through the experimental road paving experience.