S301 Reconstruction Subbase Materials Research

In Lu Dong Sea region, Granite weathered material is widely distributed, is the traditional road engineering road building materials, often used for road embankment filling, or through the cement and other binders used stable road base or subbase. In recent years, with the increase in traffic volume and traffic axle load continues to increase, many road pavement cracking occurred early pits and other damage phenomenon, resulting in large economic losses and adverse social impact. Analysis of weathered granite pavement performance materials for road projects in the region designed to combat early disease has a very important engineering significance.Combined Lu Dong sea weathered granite cement stabilized subbase material material practical application status area, according to the characteristics of the project area and stratigraphic distribution of weathered material of granite weathering material characteristics of the project area were divided; the use of a soluble salt solution etching method, never unconfined compressive strength, anti-erosion properties, corrosion resistance, etc., respectively 20%,30%,40% three coarse aggregate content of cement stabilized granite weathering material in the standard of health, the health conditions under leach solution material properties were studied.The results show stable granite weathered cement compound, coarse aggregate content increased to 30%, a significant increase in the compressive strength of the material; the coarse aggregate content from 30% to 40%, a smaller increase in the compressive strength value. Coarse aggregate content from 20% to 30% has more excellent value for money. In the anti-erosion test, with the coarse aggregate content increased material erosion test after three mass loss P decreases, coarse aggregate content is from 20%to 30%, the specimen anti-erosion performance is more evident. In the corrosion resistance test, with the growth of age, and three kinds of materials under conditions of a soluble salt regimen, unconfined compressive strength decreased, coarse aggregate content of 20% of the material the worst performer, coarse aggregate content of 30%,40% of the two materials was significantly better than the coarse aggregate content of 20% of the material, In the cement stabilized gravel weathered granite compound participate, significantly enhanced corrosion resistance.