The advantage of grouting construction

The advantage of the grouting construction 1, density, light weight, A third of the cement) , reduce the labor intensity of underground workers. 2, solidification speed, 3, high compressive strength; 4, good permeability and plasticity, can introduce tiny crack under pressure; 5, with swelling, effective sealing leakage surrounding the borehole. Performance indicators were hole sealing material has the advantages of small density, light weight, compared with the same volume of cement, its quality is only 1/3 of the cement, reduce the labor intensity of the underground workers; After hole sealing material can be fast curing, hole sealing can condense 5. ~ ( 7) H, 24 h after, the compressive strength can reach 3 MPa; Hole sealing material strength growth characteristics, with the extension of time, the material strength increases gradually, 7 days strength can reach 12 MPa, 28 days can reach 18 MPa. With micro expansion, the volume expansion 2 within 7 days. 59%, the volume expansion 2 28 days. 79%. Several different methods are used to inject drilling waste underground strata with permanent disposal. Salt cave in a separate facts described in the table. This fact table focuses on slurry injection technology, it will include solid abrasive or processed into small particles, they are mixed with water or other liquid into the mud, and under the pressure of high enough to mud injected underground stratum, to break rock. Here referred to as the slurry injection process has been given by different authors to other name, including the fracturing of slurry injection ( The description terminology is copyright protection of mud into service company) , fracturing slurry injection, drilling cuttings injection, cuttings. Injection, grinding and injection.