Research On Construction Technology Of Cement Stabilized Macadam Base By The Method Of Super Thick And Wide Construction

The way of layered paving and parallel operation was used in the paving of cement stabilized macadam base, but it produced seam of 300-600 mm, joint segregation, Layered paving caused damage and destruction to lower paving layer structure, Inevitably appear different interlayer stress and design stress, reduce the carrying capacity of base as a whole layer, it caused the force adverse of base,and it extend the construction time. The method not only can improve the ability of The overall quality of the base, without too much investment, has become the hot issue concerned by all circles expert.Paving of super thick and wide construction refers to one-time paving exceed the maximum thickness of the past using a spreader instead parallel operation layered paving, the paving thickness more than 20 cm. The emergence of super thick and wide construction improve the above problems to some extent. In this paper, research on construction technology of cement stabilized macadam base by the method of super thick and wide construction were studied based on the melon star highway.First raw materials of cement stabilized macadam base by the method of super thick and wide construction were researched by joint aggregate processing technology in recent years, mix proportion design demand and project, The results show that raw materials should comply with the specification requirements. It should try to use stone chips and mechanism of sand under the condition of the construction conditions permit, so that the cement dos was reduced under the condition of unconfined compressive strength unchanged.Secondly the two kinds of cement stabilized macadam mixture indoor forming method were contrasted and researched. it is concluded vibration parameters of the cement stable macadam mixture, and unconfined compressive strength and maximum dry density under the vibration molding is larger than by the method of static pressure; shrinkage strain of specimen of vibration molding are less than shrinkage strain of specimen of static pressure molding. Vibration molding method can better simulate the scene compaction technology, it has obvious significance to control the construction quality.Finally construction machinery equipment type were selected. paving, rolling and curing process were studied base on projects of the melon star highway cement stabilized macadam base. Cement dosage, gradation, water content, degree of compaction and unconfined compressive strength index has carried on the statistical analysis in the process of test road paving, this paper discusses the variability reason of construction and improvement measures. The distribution of stress and strain of pavement were collected and analysised by embedded sensors in melon star road 9 the.