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Low-temperature early-strength high-strength underwater grouting material

An underwater grouting and early-strength technology is applied in the field of building materials to achieve the effects of reducing aggregate porosity, improving underwater anti-dispersion performance, and good final compressive strength.

Active Publication Date: 2016-06-01
JIANGSU SOBUTE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of grouting quality in underwater low-temperature environment, the invention provides a cement-based grouting material suitable for underwater low-temperature environment, with fast early-strength strength increase, high final strength and strong underwater dispersion resistance

Method used

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  • Low-temperature early-strength high-strength underwater grouting material
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  • Low-temperature early-strength high-strength underwater grouting material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Low-temperature early-strength and high-strength underwater grouting material is mixed by the following components by weight:

[0038]

[0039] Among them, the mineral powder is ultra-fine mineral powder with a specific surface area of ​​1500m 2 / kg; bulk density of densified silica fume is 500kg / m 3 ;The composite expansion agent is a mixture of alkali metal plastic expansion agent and sulfoaluminate expansion agent with a mass ratio of 1:60; the early-strength powder water reducing agent adopts PCA-500P high-performance polycarboxylic acid of Jiangsu Subote Co., Ltd. Early strength water reducing agent; nano calcium silicate hydrate is nano calcium silicate hydrate powder; anti-dispersion compound is a mixture of 6 million molecular weight polyacrylamide and hydroxypropyl guar gum in a mass ratio of 1:3.

Embodiment 2

[0041] Low-temperature early-strength and high-strength underwater grouting material is mixed by the following components by weight:

[0042]

[0043]

[0044] Among them, the mineral powder is ultra-fine mineral powder with a specific surface area of ​​1700m 2 / kg; bulk density of densified silica fume is 700kg / m 3 ;The composite expansion agent is a mixture of alkali metal plastic expansion agent and sulfoaluminate expansion agent with a mass ratio of 1:60; the early-strength powder water reducing agent adopts PCA-500P high-performance polycarboxylic acid of Jiangsu Subote Co., Ltd. Early strength water reducing agent; nano calcium silicate hydrate is nano calcium silicate hydrate powder; anti-dispersion compound is a mixture of 6 million molecular weight polyacrylamide and hydroxypropyl guar gum in a mass ratio of 1:4.

Embodiment 3

[0046] Low-temperature early-strength and high-strength underwater grouting material is mixed by the following components by weight:

[0047]

[0048] Among them, the mineral powder is ultra-fine mineral powder with a specific surface area of ​​1500m 2 / kg; bulk density of densified silica fume is 600kg / m 3 ;The composite expansion agent is a mixture of alkali metal plastic expansion agent and sulfoaluminate expansion agent with a mass ratio of 1:60; the early-strength powder water reducing agent adopts PCA-500P high-performance polycarboxylic acid of Jiangsu Subote Co., Ltd. Early strength water reducing agent; nano calcium silicate hydrate is nano calcium silicate hydrate powder; anti-dispersion compound is a mixture of 6 million molecular weight polyacrylamide and hydroxypropyl guar gum in a mass ratio of 1:3.

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Abstract

The invention provides a low-temperature early-strength high-strength underwater grouting material. The low-temperature early-strength high-strength underwater grouting material consists of the following ingredients in parts by weight: 30-45 parts of ordinary Portland cement, 45-60 parts of fine aggregate, 5-10 parts of mineral powder, 2-4 parts of encryption silica fume, 0.5-1 part of a compound expanding agent, 0.2-0.5 part of an early-strength powdery water reducer, 0.1-0.5 part of nano hydrated calcium silicate, 0.3-0.5 part of a compound early-strength agent and 0.1-0.3 part of a dispersion-resistant compound. The low-temperature early-strength, low-temperature high-strength and dispersion resistant properties of the low-temperature early-strength high-strength underwater grouting material in water are improved at the same time in the four aspects of reducing the void ratio of the aggregate, optimizing the expanding components and improving the nano early strength and the dispersion resistance, the construction performance, such as the water holding performance and the viscosity, of the grouting material are remarkably improved, the 1d strength and the 28d strength of the grouting material under the undersea low-temperature condition are effectively improved, and the underwater dispersion resistance of the grouting material can be greatly improved. The low-temperature early-strength high-strength underwater grouting material has favorable low-temperature early-strength, low-temperature high-strength and underwater dispersion resistant functions.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to a low-temperature early-strength high-strength underwater grouting material. Background technique [0002] Cement-based grouting material has been widely studied and applied as a commonly used repair and reinforcement material. In recent years, with the increase in the scale of infrastructure construction in my country, the use of grouting materials has also been comprehensively expanded to fields such as electric power, ports, and oceans, and has been gradually applied to complex environments such as low temperature and high water on the seabed. The low temperature early strength, low temperature high strength and anti-dispersion performance put forward higher requirements. [0003] The ambient temperature has a very important influence on the hardening speed and mechanical properties of the grouting material. Especially under the low temperature condition of the seabed, ordina...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B24/24C04B22/08C04B24/04C04B111/70C04B111/74C04B103/12
CPCC04B28/04C04B40/0039C04B2103/0082C04B2103/12C04B2111/70C04B2111/74C04B2201/50C04B14/068C04B18/141C04B18/146C04B2103/0068C04B24/24C04B22/08C04B24/04C04B22/085C04B24/2652C04B24/38
Inventor 徐海源沙建芳郭飞吴洲刘建忠
Owner JIANGSU SOBUTE NEW MATERIALS
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