Mesoscopic Weakening Feature of Marble During Water Rock Interaction

• Published in: Geotechnical and geological engineering Vol. 37; no. 1; pp. 121 - 128
• Main Authors: Xu, Jin, Zhang, Jiasheng, Liu, Taoying
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01.01.2019; Springer Nature B.V
• Subjects: Civil Engineering; Corrosion; Corrosion effects; Crack propagation; Datum (elevation); Earth and Environmental Science; Earth Sciences; Geotechnical Engineering & Applied Earth Sciences; Hydrochemistry; Hydrogeology; Interaction parameters; Lasers; Marble; Microstructure; Morphology; Organic chemistry; Original Paper; Rock masses; Rock mechanics; Rocks; Stability; Stress intensity factors; Terrestrial Pollution; Testing; Waste Management/Waste Technology; Microscopic damage; Subcritical crack growth; Morphology of surface; Double torsion specimen; Water rock interaction
• ISSN: 0960-3182; 1573-1529
• DOI: 10.1007/s10706-018-0596-6

Research on the water–rock interaction has become an important subject in rock mechanics field, the link between the mineral particles is weakened and the microstructure of rock mass is changed because of chemical corrosion effect after water–rock interaction. In this paper, double torsion testing of marble specimens has been adopt to determine subcritical crack propagation parameters during rock interaction, the morphological characteristics in this process were also quantified while the surface was scanned by a three-dimensional high-accuracy non-contact laser morphology instrument Talysurf CLI 2000. It shows the discreteness and deviation degree of datum plane on the surface of the rock specimens are increased after water–rock interaction, the highness difference decreased and become more coordinated. Meanwhile, the corresponding relationship between stress intensity factor K I and subcritical crack growth velocity v shows that rock interaction speeds up the subcritical crack growth. Those testing results provide a basis for the micro damage mechanism studying for rock engineering stability which are related to hydrochemistry.