Cement mortar suitable for anti-seepage reinforcement of water-rich karst large-cavity strata

Abstract

The invention discloses a cement mortar suitable for anti-seepage reinforcement of water-rich karst large-cavity strata. The cement mortar suitable for anti-seepage reinforcement comprises water, cement, sands and a modifier, a weight ratio of the cement to the sands to the modifier is 1:(0.4-0.75):(0.01-0.0125), the modifier is a mineral additive, and the mineral additive mainly is sodium aluminate. The product has the advantages of stable basic mortar performances, adjustable mortar setting time, adjustable fluidity, good water flow scouring resistance, high concretion rate and high strengthwhen applied to the anti-seepage reinforcement of the water-rich karst large-cavity strata; the cost of the mortar is same to that of a common cement mortar; and the superior stability and the scouring resistance of the mortar greatly reduce the mortar consumption, so the engineering cost is reduced, and the mortar is friendly to the environment.

Description

technical field [0001] The invention relates to the fields of grouting such as geotechnical engineering and water conservancy engineering foundation treatment, and in particular to a cement mortar slurry suitable for anti-seepage and reinforcement of water-rich karst large-pore formations. Background technique [0002] In geotechnical engineering and foundation treatment of water conservancy engineering, the filling, anti-seepage and reinforcement of water-rich karst strata with large pores are often encountered problems. For example, in the basic engineering treatment of karst caves in dam foundations, underground powerhouses, karst around tunnels, and anti-seepage reinforcement of embankments of rivers and lakes, most of the research results are on the level of ordinary cement mortar and quick-setting slurry materials. Although ordinary cement mortar has certain advantages in technology, economy and ecology, it has disadvantages such as low plastic viscosity and yield stre...

AI Technical Summary

Problems solved by technology

Although ordinary cement mortar has certain advantages in technology, economy and ecology, it has disadvantages such as small plastic viscosity and yield stress in the early stage, long setting time of slurry material, and weak resistance to water flow erosion.

Quick-setting slurry materials have the advantages of controllable setting time and good resistance to water flow erosion, but the range of cut-off seepage channels is limited, and the seepage flow cannot be effectively controlled. The cost of quick-setting slurry materials is high, and for water-rich karst large For foundation treatment in porous strata, a large amount of slurry material is required for pouring

Images