Cement-based composite material for trenchless centrifugal spraying repair of pipeline and preparation method of material

Abstract

The invention discloses a cement-based composite material for trenchless centrifugal spraying repair of a pipeline. The cement-based composite material is prepared from the following components in parts by weight: 900 to 940 parts of cement, 140 to 160 parts of viscosity reducer, 370 to 390 parts of thickener, 1500 to 1600 parts of sand, 0.5 to 2 parts of thixotropic agent, 60 to 100 parts of setting-adjusting early strength agent, 6 to 12 parts of fiber, 30 to 40 parts of water reducing agent and 260 to 280 parts of mixing water. The invention further discloses a preparation method of the cement-based composite material for pipeline trenchless centrifugal spraying repair. According to the invention, the sprayability and early strength of the high-performance cement-based composite material can be effectively improved, so that the rebound rate is reduced, the one-time spraying thickness is increased, the compactness is improved, and continuous centrifugal spraying construction of the high-performance cement-based composite material is realized.

Description

technical field [0001] The invention relates to the field of novel cement-based composite materials. More specifically, the present invention relates to pipeline non-excavation centrifugal spray repair cement-based composite material and preparation method thereof. Background technique [0002] Due to the long-term use of the urban underground pipe network, coupled with disrepair for a long time, it often causes frequent accidents such as "running, leaking, dripping, and leaking" of the pipe network, so it is urgent to take corresponding measures to repair it. However, drainage pipes are generally located in the bustling areas of urban areas. If traditional excavation methods are used to repair damaged pipes, many problems such as road damage and traffic jams will occur. Repairing the pipelines and prolonging the service life of the pipelines will reduce the construction cost and have less impact on the surrounding environment, which has obvious social and economic benefits...

AI Technical Summary

Problems solved by technology

[0003] An object of the present invention is to provide a cement-based composite material for non-excavation centrifugal spraying and repairing of pipelines and its preparation method to solve the problem of high cost of spraying polyurethane and other polymer resin materials, high requirements for construction conditions and equipment, and insufficient structural strength of general cement mortar And other issues

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