A Study Of Cement Stabilized Macadam-Gravel Base Construction Quality Variability

As the cement stabilized macadam-gravel base is characterized by the lamellar-body structure,strong diffusion stress,stiffness,a certain resistance to fatigue strength,tensile strength and good water stability,it has been widely used in the highway pavement base construction in our country.Therefore,we have extensive experience of cement stabilized macadam base construction.However,from the existing situation,there are still some problems in the site construction.In the actual construction process,the variability of cement stabilized macadam construction not only leads to the weak base,weakens the structural strength of the base and intensifies the early damage of the base,but also intensifies the asphalt pavement crack due to the generation of base crack,thus reducing asphalt pavement service life.The research and practice shows that the variability of cement stabilized macadam base construction quality is one of the key factors influencing the base construction quality.Therefore,in-depth study of cement stabilized macadam construction variability and construction quality control has a vital significance to the improvement of the construction quality.Through a large quantity of data collection on the cement dosage,degree of compaction,water content,mixture gradation and other main construction variation factors for some road sections of Guazhou-Xingxing Gorge Expressway and Jinchang-Wuwei Expressway,this paper applies the data obtained through the analysis by using mathematical statistics method in obtaining the variability of construction key factors.In addition,this paper also analyzes the influence factors of construction variability according to the road construction of Guazhou-Xingxing Gorge Expressway and Jinchang-Wuwei Expressway,and summarizes the measures which can improve the construction level and reduce cement stabilized base construction variability,proposes reasonable parameters and control method which can ensure the successful construction of cement stabilized base.Finally,based on the variability analysis and practical construction,this paper proposes control method which can reduce the construction quality variability and reasonable parameters for cement stabilized base construction,thus improving the quality of cement stabilized macadam base construction.Therefore,it has a specific guiding significance to the construction of cement stabilized macadam base in our country.