水泥稳定碎石基层材料微裂力学特性研究

Study on Mechanical Properties of Microcracking of Cement Stabilized Crushed Stone Base Materials

微裂技术是指水泥稳定类基层经过较短养护时期(一般为1~3 d)后,让振动压路机碾压基层,产生微细裂缝网络,可避免基层材料由于自身收缩产生严重的宽或长裂缝。微裂后基层力学强度只是暂时损失,会随龄期逐渐恢复,影响其恢复能力的主要因素有混合料结构类型、水泥剂量、微裂实施时间和微裂损伤程度等。研究微裂技术,需从不同影响因素下水稳碎石基层材料微裂后力学强度发展规律影响方面展开研究。

Microcracking technique referred to the vibratory roller was used to pass to the cement- treated base after a shoar stage of 1 to 3 days to create a fine network of cracks to avoid the severe wide or long cracks due to its contraction. After microcracking, the loss of mechanical strength at the base was temporary, the mechanical strength could gradually restore along with the age, and the main factors of affecting its restor ability including mixture structure type, cement dosage, curing time and microcrack- ing-damaged degree etc. To better study the microcracking technique, needing research on the mechani- cal strength behavior of asphalt pavement at microcraked-base.