A kind of underwater concrete repair reinforcement material and preparation method thereof

A technology of underwater concrete and reinforced materials, which is applied in the field of building materials to achieve the effects of convenient construction, strong stability and good construction performance

Active Publication Date: 2022-04-22
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most anti-dispersion agents are difficult to meet the requirements of underwater non-dispersible concrete to have good construction performance, mechanical strength and durability while having good stability.

Method used

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  • A kind of underwater concrete repair reinforcement material and preparation method thereof
  • A kind of underwater concrete repair reinforcement material and preparation method thereof

Examples

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preparation example Construction

[0028] like figure 1 As shown, an underwater concrete repair strengthening material and a preparation method thereof include the following raw materials in terms of mass percentage: 10%-20% of cement, 10%-15% of fly ash, 15%-25% of river sand, and 15% of crushed stone -20%, clay conditioner 1%-3%, nanocellulose 1%-3%, polycarboxylate superplasticizer 0.3-0.5%, flocculant 0.3-0.5%, antifreeze agent 0.3-0.5%, air-entraining agent 0.3-0.5%, alkaline activator 3-5%, etc., the balance is water, and the sum of the mass percentages of the above components is 100%. The underwater concrete repair strengthening material prepared by the invention has good fluidity, cohesiveness and filling property, and can quickly set when being constructed in an underwater environment and ensure the strength and stability of concrete.

[0029] The present invention provides a kind of preparation method of underwater concrete repair reinforcing material, according to the above-mentioned mass percentage...

Embodiment 1

[0036] The following raw materials are included in terms of mass percentage: 10% cement, 15% fly ash, 25% river sand, 20% gravel, 1% clay conditioner, 1% nanocellulose, 0.3% polycarboxylate superplasticizer, flocculant 0.3%, antifreeze 0.3%, air-entraining agent 0.3-0.5%, alkaline activator 3%, etc., and the rest is water. The sum of the mass percentages of the above components is 100%.

[0037] Preparation process steps:

[0038] S1. Stir cement, fly ash, river sand, gravel, clay modifier, nanocellulose, etc. in a mixer for 1 to 2 minutes, and mix evenly to obtain a dry mix;

[0039] S2. Add water, water reducing agent, flocculant, antifreeze agent, air-entraining agent and alkaline activator to the dry mixture prepared in step S1, and mix and stir for 2 to 5 minutes until the mixture has good fluidity. Prepare the slurry;

[0040] S3, pouring the slurry prepared in step S2 into a mold, vibrating evenly, finishing and plastering the surface, and obtaining a green body after...

Embodiment 2

[0043]An underwater concrete repair strengthening material and a preparation method thereof, comprising the following raw materials in terms of mass percentages: 12% cement, 12% fly ash, 20% river sand, 15% crushed stone, 2% clay regulator, and 2% nanocellulose %, 0.3% polycarboxylate superplasticizer, 0.3% flocculant, 0.3% antifreeze, 0.3% air-entraining agent, 4% alkaline activator, etc., and the rest is water. The sum of the mass percentages of the above components is 100%.

[0044] The preparation steps are the same as in Example 1.

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Abstract

The invention discloses an underwater concrete repair strengthening material. Restoration reinforcement materials include the following raw materials in terms of mass percentage: 10%-20% of cement, 10%-15% of fly ash, 15%-25% of river sand, 15%-20% of crushed stone, 1%-3% of clay conditioner, Nanocellulose 1%‑3%, polycarboxylate superplasticizer 0.3‑0.5%, flocculant 0.3‑0.5%, antifreeze agent 0.3‑0.5%, air-entraining agent 0.3‑0.5% and alkaline activator 3‑5% , and the balance is water. The clay regulator used in the present invention belongs to the 2:1 type multi-dimensional inorganic clay mineral, which provides additional reactive sites for the nucleation and growth process of hydration products, reduces the alkalinity environment of the matrix, and promotes the gradual polymerization of Si-O bonds into The Si-O-Si bond can adjust the setting time of the slurry, and has a certain physical cross-linking effect, which can improve the working performance and mechanical properties of the concrete material.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an underwater concrete repair strengthening material and a preparation method thereof. Background technique [0002] So far, in underwater engineering, concrete is still one of the most important and largest building materials. The performance of concrete will directly affect the quality and progress of underwater projects. Therefore, the performance research and construction technology of underwater concrete have been paid more and more attention by the engineering and technical circles. When ordinary concrete is directly poured in a water environment, it will be affected by water, resulting in separation, cement loss, strength decline, and environmental pollution. Therefore, it is very necessary to improve the traditional underwater concrete so that it can overcome the above-mentioned defects. [0003] There is still a certain gap between my country's underwater n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B12/04C04B22/06C04B22/08C04B24/38C04B111/74C04B111/72
CPCC04B28/00C04B24/383C04B22/062C04B12/04C04B22/08C04B2201/50C04B2111/74C04B2111/72C04B18/08C04B14/06C04B14/048C04B2103/302C04B2103/601C04B2103/304C04B2103/0068
Inventor 李茂森段平江金萍覃铃玲罗仁刘怀
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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