摘要
通过不同应力状态下的试验 ,对岩石破裂特性的化学环境的侵蚀进行了考查 :与空气侵蚀条件相比 ,裂纹尖端的水或化学溶液使岩石的破裂韧度明显地降低 ;应力腐蚀破裂也明显地受到化学环境的影响 ,并依赖于ζ电位 ;抗拉强度明显地受到化学集结物的影响 ,并依赖于ζ电位 ,而三轴强度不会因化学集结物的变化而明显地变化。
The effect of chemical environments on microfracturing properties of rocks is investigated by double torsion tests, three point bending tests, Brazilian tests, and multi stage triaxial tests on sandstone and granite specimens. Water or chemical solutions at the crack tip significantly decrease the fracture toughness of the rock specimen. Stress corrosion cracking in double torsion tests is also significantly affected by the chemical environments and related to the ζ potential. The tensile strength significantly varies with concentration of chemicals and is dependent on ζ potential, while the triaxial strength does not vary significantly with concentration of chemical solutions.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2000年第4期403-407,共5页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金
中国科学院"百人计划"项目
关键词
化学环境
岩石强度
岩石破裂特性
试验
chemical environment, rock strength, microfracturing properties, effect
