The Influence of Different Subbase Materials on the Crack of Cement Stabilized Macadam Base during Construction
According to actual axle load data and the measured mechanical parameters of cement stabilized macadam material with different cement dosages,the bottom tensile stresses of different subbase structures are calculated and the results show that:to graded gravel subbase,the weight of construction vehicle is inadvisable to be more than 35t and the cement dosage of base course shall be more than 3.0%; and,the maximum bottom tensile stress of graded gravel subbase shall be much more than that of lime-flyash soil subbase.According to the measured dry shrinkage strain and dry shrinkage coefficient,the dry shrinkage crack space of base course is analyzed and the results show that:under the same cement dosage,the crack space of the base course with graded gravel subbase is smaller than that of lime-flyash soil subbase; with the increase of cement dosage,the crack space of base course increase first and then decrease,and when the cement dosage is 3.5%,the dry shrinkage strain and dry shrinkage coefficient is minimum and the crack space of base course is maximum.
Cement stabilized macadam base Lime-flyash soil subbase Graded gravel subbase Construction period Crack
Xiao Feng Liao Fen Xiao Zhong Da Chen Lei Xing
School of Highway of Changan University,Xian 710064,Shaanxi,China Nanchang Institute of Technology,Nanchang Jiangxi,China,330099
国际会议
广州
英文
955-959
2012-11-16（万方平台首次上网日期，不代表论文的发表时间）