The effect of evolution of rock asphalt subjected to high temperature and high pressure on the mechanical properties of oil well cement

被引：4
|
作者：
Zhang, Chunmei [1 ]
Wang, Jia [2 ]
Cai, Jingxuan [1 ]
Li, Kun [1 ]
Hu, Chen [1 ]
Mei, Kaiyuan [1 ]
Cheng, Xiaowei [1 ]
机构：
[1] Southwest Petr Univ, Sch New Energy & Mat, Chengdu 610500, Peoples R China
[2] Jiahua Special Cement Co ltd, Leshan 614000, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2024年 / 420卷
关键词：
High temperature and high pressure; Oil well cement paste; Rock asphalt; Structural evolution; Mechanical properties; COAL-TAR-PITCH; PYROLYSIS; MICROSTRUCTURE; PERFORMANCE; COMBUSTION; FIBERS; BINDER;
D O I：
10.1016/j.conbuildmat.2024.135323
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
In this paper, the structural evolution of natural rock asphalt and rock asphalt treated with liquid nitrogen subjected to high temperature and high pressure (HTHP) were studied, and then its influence on mechanical properties of oil well cement was investigated. The results show that the pyrolysis reaction of rock asphalt was promoted by HTHP, which occurred at 320 degrees C at normal pressure and appeared at 180 degrees C/20.7 MPa. The pores in the particles caused by the pyrolysis of rock asphalt were healed with the extension of curing time, and the interface bond between rock asphalt and cement matrix was improved. Rock asphalt has a good toughening effect on cement paste, especially treated rock asphalt.
引用
收藏
页数：14
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