Preparation method of karst foundation grouting single-control cement grout

A preparation method and cement slurry technology, which are applied in soil protection, infrastructure engineering, construction and other directions, can solve the problems of affecting the water environment, low stone rate, slurry loss, etc., and achieve the effect of improving construction efficiency and broad application prospects.

Pending Publication Date: 2019-03-01
CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP +1
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Problems solved by technology

The connectivity between the caves is poor. Even if the cement slurry with a long setting time is used, it will not spread too far. The loss of the slurry is not the main problem. It is not necessary to control the gelation time of the slurry, but it is necessary to solve the large amount of water in the slurry that affects the water environment and the stone rate. Problems with low filling performance

Method used

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  • Preparation method of karst foundation grouting single-control cement grout
  • Preparation method of karst foundation grouting single-control cement grout
  • Preparation method of karst foundation grouting single-control cement grout

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Embodiment Construction

[0021] The present invention will be described in detail below in combination with specific embodiments.

[0022] The invention relates to a method for preparing single-control grout for karst foundation grouting, which is made by stirring cement, additives and water in an iron bucket, and can be constructed by using the technological process of ordinary grout, and is suitable for grouting treatment The karst foundation has poor connectivity and is not easy to lose a large amount of grout. Among them, the cement is selected from Portland cement and ordinary Portland cement, and the water-cement ratio is 1:1.

[0023] The additives include coagulant, water retaining agent and water reducing agent. The coagulation accelerator is selected from various materials such as aluminate, carbonate, quicklime, anhydrous gypsum, metaaluminate, etc., preferably industrial grade sodium carbonate, which has the effect of accelerating the gelation of cement slurry and reducing the water separ...

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Abstract

The invention relates to a preparation method of a karst foundation grouting single-control cement grout. According to a technical index of a water bleeding rate not higher than 5%, the preparation method comprises mixing coagulation accelerator, water-retaining agent and water reducer into cement slurry to prepare the karst foundation grouting single-control cement grout. The dosage of components, especially additives, in the prepared karst foundation grouting single-control cement grout is determined according to the technical index of the water bleeding rate, so that the karst foundation grouting single-control cement grout has the advantages of being low in water bleeding rate, high in concretion rate and simple in construction process, is applicable to grouting karst foundations withpoor grouting treatment connectivity and easy loss of large amount of slurry and further has a broad application prospect in karst foundation processing.

Description

technical field [0001] The invention relates to the field of cement-based grouting materials, in particular to a method for preparing single-control grout for karst foundation grouting. Background technique [0002] Ordinary cement slurry is made of ordinary Portland cement and water by mechanical stirring. The water-cement ratio commonly used in karst foundation grouting treatment projects is generally 0.8:1~1:1. The gel time of ordinary cement slurry is long, such as the gel time of 1:1 water-cement ratio cement slurry is about 10h. In areas with strong development of karst foundation and good connectivity, grout flows along karst crevices and pipelines, resulting in waste of engineering materials. Ordinary cement slurry has a high water separation rate. For example, the water separation rate of ordinary 1:1 water-cement ratio cement slurry is about 35%. The water separation rate is strongly alkaline and carries hexavalent chromium, and the water separation rate pollutes ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04E02D15/02E02D15/04E02D3/12C04B111/70
CPCC04B28/04C04B2111/00146C04B2111/70E02D3/12E02D15/02E02D15/04E02D2250/003E02D2300/0021C04B22/08C04B14/26C04B22/064C04B22/143C04B22/10C04B18/141C04B14/02C04B14/14C04B14/08C04B18/146C04B2103/302
Inventor 曹元平王向阳潘卫东郭文瑛
Owner CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP
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