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Building waterproof self-repairing material and preparation method thereof

A self-healing material and building waterproofing technology, applied in the field of building materials, can solve problems such as being unsuitable for the long-term development of the building waterproofing industry, poor compatibility of concrete substrates, and poor environmental performance, achieving good fluidity, enhanced mechanical properties and durability. , Good construction performance

Pending Publication Date: 2022-03-01
武汉博宏建设集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, most waterproof coatings or osmotic crystallization methods are prone to aging, have poor environmental performance, and poor compatibility with concrete substrates, which are not suitable for the long-term development of the building waterproofing industry.

Method used

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  • Building waterproof self-repairing material and preparation method thereof

Examples

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preparation example Construction

[0041] The present invention also provides a preparation method applied to the building waterproof self-repairing material described in any of the above embodiments, comprising the following steps:

[0042] S1. The ingredients are as follows (g / L): starch: 10, glucose: 10, beef extract: 5, KNO3: 0.5, NaCl: 0.5, KH2PO4: 2, MgSO4: 0.5, FeSO4·7H2O: 0.005, pH 7, and Mix 500ml of sterile water and put it in a shaker at 30°C for 5 days to shake for 5 days to obtain a microbial culture medium, a modified CAZPECK DOX-medium medium;

[0043] S2. Stir the raw materials according to the above mass percentages in a mixer for 1 to 2 minutes, and mix them uniformly to obtain a dry blend;

[0044] S3. Add water, water reducing agent, flocculant, antifreeze agent, air-entraining agent and alkaline activator to the dry mixture prepared in step S2, and mix and stir for 2 to 5 minutes until the mixture has good fluidity. Prepare the slurry;

[0045] S4, adding the microorganisms in the culture...

Embodiment 1

[0050] Including the following raw materials according to mass percentage: 10% cement, 15% silica fume, 10% fly ash, 15% slag, 1% nano silicon dioxide, 1% nano clay, 1% clay regulator, 1% nano cellulose, Hydrogel 2%, porogen 0.3%, polycarboxylate superplasticizer 0.3%, flocculant 0.3%, air-entraining agent 0.3%, alkaline activator 3%, microorganism (fungi, bacteria, actinomycetes) 0.01 %((g / L): starch: 10, glucose: 10, beef extract: 5, KNO3: 0.5, NaCl: 0.5, KH2PO4: 2, MgSO4: 0.5, FeSO4 7H2O: 0.005)), the balance is water, The sum of the mass percentages of the above components is 100%.

[0051] Preparation process steps:

[0052] S1. The ingredients are as follows (g / L): starch: 10, glucose: 10, beef extract: 5, KNO3: 0.5, NaCl: 0.5, KH2PO4: 2, MgSO4: 0.5, FeSO4·7H2O: 0.005, pH 7, and 500ml of sterile water was mixed and placed in a shaker at 30°C for 5 days. The medium commonly used for making microorganisms - modified CAZPECK DOX-medium medium.

[0053] S2. Stir cement, ...

Embodiment 2

[0059] A building waterproof self-repairing material and a preparation method thereof, comprising the following raw materials in terms of mass percentages:

[0060] 12% cement, 17% silica fume, 12% fly ash, 17% slag, 2% nano-silica, 2% nano-clay, 2% clay regulator, 2% nano-cellulose, 3% hydrogel. Pore ​​agent 0.4%, polycarboxylate superplasticizer 0.4%, flocculant 0.4%, air-entraining agent 0.4%, alkaline activator 4%, microorganism (fungi, bacteria, actinomycetes) 0.01%-0.03% ((g / L): starch: 10, glucose: 10, beef extract: 5, KNO3: 0.5, NaCl: 0.5, KH2PO4: 2, MgSO4: 0.5, FeSO4 7H2O: 0.005)), the rest is water, the above components The sum of the mass percentages is 100%.

[0061] The preparation steps are the same as in Example 1.

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Abstract

The invention discloses a building waterproof self-repairing material and a preparation method thereof, and the building waterproof self-repairing material comprises the following raw materials by mass: 10%-15% of cement, 15%-25% of silica fume, 10%-15% of fly ash, 15%-20% of slag, 1%-5% of nano-silica, 1%-3% of nano-clay, 1%-3% of a clay regulator, and 1%-3% of nano-cellulose. The concrete is prepared from the following components in percentage by weight: 2%-5% of hydrogel, 0.3%-1% of a pore-foaming agent, 0.3%-0.5% of a polycarboxylic acid water reducing agent, 0.3%-0.5% of a flocculating agent, 0.3%-0.5% of an air entraining agent, 3%-5% of an alkali activator, 0.01%-0.03% of microorganisms and the balance of water. The building waterproof self-repairing material can prevent water from permeating into a concrete building when used in the field of daily buildings, can perform self-repairing under the condition that water permeates into the concrete building, and has the advantages of good stability, early strength, rapid hardening and excellent mechanical properties.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a building waterproof self-repairing material and a preparation method thereof. Background technique [0002] Concrete is a porous structure material formed by chemical reaction of cementitious material, aggregate (coarse aggregate, fine aggregate), and water after mixing. In modern construction engineering, when the surface of the building fails to penetrate and waterproof. Water will penetrate the holes and cracks of reinforced concrete, which will cause the steel bars in the concrete structure to corrode and lead to back penetration. Subsequent maintenance can only be partially blocked on the back water surface or re-made internal defenses, but the life of reinforced concrete caused by external waterproofing failures will be damaged. But can't make up for it. [0003] There is still a certain gap between the overall technology of building waterproof self-repairing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B28/06C04B28/34C04B38/02C04B38/10C04B24/38C04B14/10C04B14/06C12N1/20C12N1/14C04B111/20C04B111/27C04B111/40C04B111/72
CPCC04B28/00C04B28/06C04B28/34C04B38/02C04B38/10C04B24/383C04B14/062C04B14/10C12N1/20C12N1/14C04B2201/50C04B2111/27C04B2111/40C04B2111/72C04B2111/20C04B18/146C04B18/08C04B18/141C04B2103/302C04B2103/304C04B2103/0001C04B14/102C04B14/104C04B12/04C04B22/062C04B20/008
Inventor 苏琦奚雷周昌文辛桂华段平严嘉豪周梦雅樊晋源罗仁刘怀覃铃玲
Owner 武汉博宏建设集团有限公司
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