Research of Cement Stabilized Secondary Recycling Materials
Cold recycling technology has been widely used in road maintenance projects. Many roads which have been reconstructed with cold recycling technology have emerged some diseases after a long-term used. In this condition, these roads can be rebuilt by secondary recycling technology. The microstructure characteristics of secondary recycled road materials after cement stabilizing were observed by SEM; then, material properties after being long-term used and secondary recycled were analyzed. CBR value and aggregate crush value are put forward for the evaluation indexes of secondary recycling. The unconfined compressive strength, splitting strength and modulus of cement stabilized secondary recycling materials are determined by laboratory tests. The results indicate that the existence of asphalt components lead the strength lower than ordinary base materials stabilized by cement. And temperature exerts an obviously influence on the compressive strength. Frost resistance, water stability and anti-erosion resistance are also determined by laboratory tests. The results indicate that the strength and pavement performance of cement secondary recycling materials can meet the requirements for base and sub base in asphalt pavement.
Huaiying Zhou, Tianlong Gu, Daoguo Yang, Zhengyi Jiang, Jianmin Zeng
J. M. Wu and W. Zong, "Research of Cement Stabilized Secondary Recycling Materials", Advanced Materials Research, Vols. 197-198, pp. 1674-1680, 2011