Mechanical Properties and Crack Resistances of Cement-Stabilized Crushed Pebbles Produced via Vibration Compaction Method

作者：Ji, Xiaoping; Li, Xianghang; Hou, Yueqin^*; Wang, Tao

来源：Journal of Testing and Evaluation, 2020, 48(4): 3057-3072.

DOI：10.1520/JTE20170767

• road engineering
• cement stabilization
• crushed pebble
• vibration compaction method
• mechanical properties
• crack resistances

The objective of this study is to investigate the mechanical behavior and shrinkage resistance of cement-stabilized crushed pebble (CSCP) produced via vibration compaction method (VCM). Ten kinds of CSCP5 with two different gradations and five cement contents were produced via VCM. The mechanical properties of the CSCP5, including unconfined compressive strength (UCS), splitting strength (SPS), and resilient modulus (RM), were evaluated. Subsequently, the effects of cement contents, curing time, gradation types, and degrees of compaction on the mechanical behavior were investigated. The dry shrinkage and temperature shrinkage and their influencing factors were also studied. Furthermore, the mechanical properties of CSCP5 were compared with those of cement-stabilized limestone and granite. The results show that the mechanical properties of the CSCP5 increased linearly with the increase in cement contents and nonlinearly with the increase in the curing period and could be improved by using skeleton-dense gradation and increasing the degree of compaction. A good linear relationship was observed between the UCS and SPS and between the UCS and RM. The dry shrinkage and temperature shrinkage resistance of CSCP5 could also be improved by using skeleton-dense gradation. The mechanical properties of the CSCP5 were lower than those of cement-stabilized limestone, but slightly higher than those of cement-stabilized granite.

• 出版日期2020-7
• 单位长安大学; 西安交通大学