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Weathered sand has widely distributed, abundant source material , the advantages of low cost , while there are low intensity grading instability and other shortcomings. In this paper, a large number of laboratory tests and physical works on the weathered sand , cement stabilized sand and two gray weathered weathered sand stabilization various road performance were studied ; analyzed the reasons for the low intensity of weathered sand , and proposed mitigation measures . First, the mineral composition of weathered sand , weathered sand graded composition and strength of the particles has been systematically studied . Then through laboratory tests on cement stabilized sand and two gray weathered weathered sand stabilization strength, stiffness , stability, crack resistance has been systematically studied , the study found weathered cement stabilized sand has a high strength, stiffness, good stability and crack resistance ; two stable weathered gray sand with high strength , stiffness, water stability , but freeze and crack resistance somewhat less stable . On this basis, the improvement of weathered sand road performance methods are discussed , the test found that preload weathered sand to improve the stability of cement compressive strength, splitting tensile strength , freeze stability effect is obvious ; weathered sand with cement stabilized macadam high strength and stability , better economy . Finally, the physical works weathered sand for cement stabilized subbase as a highway of the effect has been verified.
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