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Underwater anti-dispersion mortar for large area cavity grouting, and preparation method thereof

A large-area, anti-dispersion technology, applied in the field of grouting materials and their preparation, can solve problems such as unsatisfactory plugging grouting materials, and achieve the effects of fast raw materials, high strength guarantee rate, and convenient construction

Active Publication Date: 2014-07-16
CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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  • Abstract
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Problems solved by technology

[0004] Therefore, the existing plugging grouting materials for this large-scale underwater karst passage and cavity are still not ideal.

Method used

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  • Underwater anti-dispersion mortar for large area cavity grouting, and preparation method thereof

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Embodiment Construction

[0014] Below in conjunction with embodiment the present invention is described in further detail.

[0015] The present invention adopts polycarboxylate high-performance water reducer and hydroxypropyl methyl cellulose, greatly reduces the water-binder ratio, increases the flocculation and water-resistant dispersibility of the mortar, and makes the grouting mortar have high fluidity and self-flowing The characteristics of compactness, underwater anti-dispersion and high compressive strength can effectively solve the difficulties of the existing technology.

[0016] An example of the present invention is as follows:

[0017] When preparing the present invention, first select cement with a strength of not less than 42.5MPa, national standard II grade fly ash, natural sand or artificial sand with fineness in the range of medium sand, polycarboxylate high-performance water reducer, hydroxypropyl methyl Base cellulose and water are measured separately according to the mixing ratio ...

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Abstract

The present invention discloses an underwater anti-dispersion mortar for large area cavity grouting. The underwater anti-dispersion mortar is prepared from a cementing material, an aggregate, water, a water reducing agent and a thickening agent, wherein the amount of the cementing material is 700-1200 kg / m<3>, the amount of the aggregate is 700-1500 kg / m<3>, the amount of the water reducing agent is 0.5-6.0% of the total mass of the cementing material, the amount of the thickening agent is 0.01-0.2% of the total mass of the cementing material, and a water-cement ratio is 0.25-0.50. According to the present invention, the underwater anti-dispersion mortar has characteristics of high fluidity and high underwater anti-dispersion property, and can meet continuous and stable casting in the case of small grouting pipe diameter and not large construction scene; the water-cement ratio is reduced to increase the compressive strength of the mortar, such that the mortar has high affluence strength; and the prepared mortar has advantages of simple construction process, convenient and rapid construction, and easily available raw materials.

Description

technical field [0001] The invention relates to a grouting material and a preparation method thereof, in particular to an underwater anti-dispersion mortar used for plugging grouting of large-area underwater karst passages and underwater building cavities and a preparation method thereof. Background technique [0002] In water conservancy and hydropower projects, it is often necessary to block some hidden underground karst passages or cavities or cavities of underwater buildings. This type of project usually has the following characteristics: karst passages or cavities, large internal area of ​​holes, internal structure Complex, with water passing through the inside and the flow rate is not small, and the inside is under high pressure, etc. In this type of project, there are mainly the following difficulties to be solved: ①The internal structure of karst channels or cavities is complex, and the cavity can only be filled by the self-flow and diffusion of mortar; The cement m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
Inventor 王建琦何金荣张细和曾正宾李勇谭建军
Owner CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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