A Basic Study On Modification Of Physical And Chemical Soft Rock Properties

The physic and chemical soft rock is a kind of soft rock in engineering, which mainly stems from clay rock. Under the effect of water and weathering, the rock mass quality of clay rock, becomes bad. After lasting depravation, the physical and chemical soft rock is produced finally. Mining engineering, geotechnical. engineering, water resources and hydropower engineering, subway engineering, and other important engineering are all connected with physical and chemically soft rock, which controls stability of underground saps, tunnels, large dams, rock-slop engineering, and etc. Also, it has resulted in many engineering failures and economic losses. Solution to these important engineering problems are based on the study of modification about physical chemical soft rock, so the study of modification about physical chemical soft rock will be of great theoretical value and practical use.Genesis, X-ray diffraction characteristics, Crystal structure characteristics, surface properties, chemical composition and function, hydrolytic weakening properties ,of physical and chemical soft rock (Kaolinite, Montmorillorite, Illite) have been described in detail in this paper. The concept and classification, structure, properties, relationship between structure and properties, of surfactant have been described, too. The surface wetting function mechanism under the effect of Surfactant, main components and characters of Portland cement paste, have been expounded. Based on these, the following modification mechanisms are systematically expounded: (D modification mechanism of Portland cement under the effect of silicone surfactant; (2) modification mechanism of physical and chemical soft rock under the effect of modified cement paste.Finally, main contents, relevant conclusions and innovations have been concluded, emphases of ongoing research works are proposed.