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The data indicate that , in each grade highways have been built in China , more than 90% of the use of cement stabilized material and lime , fly ash stabilized material as a grass-roots material as the representative of semi-rigid material . The overall strength of the semi - rigid asphalt pavement , strong resistance to permanent deformation , semi-rigid material , however , is more sensitive to changes in temperature and humidity , and prone to shrinkage cracks and temperature shrinkage cracks . The cracks in the road will not only weaken the overall flatness of the road , but rain and other road surface water seeps into the pavement structure and lack of timely discharge , it will further reduce the strength of the grass-roots level . The main load-bearing layer of cement stabilized macadam base is a semi-rigid asphalt pavement , size of the strength of the concrete construction is closely related to the primary construction quality is good or bad ; the primary paving quality of good or bad and is directly related to the use of the performance of the overall pavement structure and length of service . In this paper, the theoretical analysis and test data , system grassroots strength and paving quality . Grassroots strength divided into molding specimen unconfined compressive strength and the scene of two parts, the degree of compaction of unconfined compressive strength combined molding gradation type , cement dose , and health conditions of these four aspects of analysis strength variability ; longer control the situation on-site compaction analysis research affect the degree of compaction factors change . Paving quality research is the analysis of grassroots the 7d health after the flatness , cracks , and core samples . A unconfined anti combination of cement stabilized macadam base , the flatness of the sub-base , as well as cracks in the case of this article , to analyze the causes and to propose appropriate control measures ; combined with grassroots drill core samples to determine the integrity of the structural layer , and core samples compressive strength , splitting tensile strength and anti-erosion performance tests , analysis of the carrying capacity of the grassroots and anti-erosion properties .
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