Study On Cement-stabilized Crushed Stones Base Construction Quality And Strength Control

Data show that China has built highways in each grade,90% are stable material used in cement and lime, fly ash stabilized materials represented by the semi-rigid material as the base materials.Semi-rigid asphalt pavement whole strength and the resistance to permanent deformation are strong, however, semi-rigid material changes in temperature and humidity sensitive, prone to shrinkage cracks and temperature shrinkage cracks. Pavement will not only weaken the overall roughness of the road, and in particular the rainwater from the pavement cracks and not get immersed in a timely manner discharge, will further reduce the strength of base. Cement-stabilized crushed stones asphalt pavement is a semi-rigid main load-bearing layer, the strength of the strength in concrete construction, and construction quality is closely related to good or bad; primary paved the quality of the construction quality is directly related to the use of pavement structure performance and service life.By a large number of test data and the analysis of theory, this paper has systematically studied base strength and construction quality. Forming base strength of the specimen is divided into the unconfined compressive strength and degree of compaction scene of two parts, with unconfined compressive strength of the main forming method, gradation type, cement dosage, and curing conditions, the strength of these four aspects of variability; and then through the on-site analysis of compaction control the situation changes in the factors that affect the degree of compaction. Construction quality study refers to end of 7d curing the roughness of the end of the base, cracks, and core samples were analyzed. Combination of cement stabilized gravel, sub-base and crack the smoothness of the situation, analyze the causes and propose appropriate the prevention and cure measures; combination of base drilling of core samples to determine the integrity of the structure layer, and core samples of unconfined resistance compressive strength, splitting tensile strength and anti-erosion performance tests, analysis of the bearing capacity of base and anti-erosion properties.