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High performance concrete inorganic environmental waterproof expanding agent and preparation method thereof

A technology of high-performance concrete and expansion agent, which is applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., and can solve the problems of not reaching the designed service life, accelerating the corrosion and destruction of steel bars, etc.

Inactive Publication Date: 2011-10-19
王福刚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the project, many building basements, roofs, roads, and bridges cannot reach the designed service life, and some projects have been seriously damaged after only a few years of use and have to be repaired. The main reason is that the current waterproof materials and concrete Agents generally contain Cl-,,,,, K+,,, Na+ ions too heavy, when added to concrete, react with active silica in concrete to form alkali silicate gel and cause concrete expansion and cracking, which is The common alkali-aggregate reaction in engineering also accelerates the corrosion of steel bars, resulting in concrete cracking and water seepage

Method used

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  • High performance concrete inorganic environmental waterproof expanding agent and preparation method thereof
  • High performance concrete inorganic environmental waterproof expanding agent and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0026] Take 20 kg of cement, 0.3 kg of aluminum sulfate, 5.6 kg of potassium aluminum sulfate, 1.5 kg of ferrous sulfate, 0.2 kg of sodium chloride, 0.2 kg of urea, 0.2 kg of sodium sulfate, 40 kg of gypsum, and 32 kg of fly ash;

[0027] These raw materials are ground into powders with a particle size of 100-150 meshes; then the raw material powders are mixed and stirred evenly to prepare a high-performance concrete inorganic environmental protection waterproof expansion agent.

[0028] The prepared high-performance concrete inorganic environmental protection waterproof expansion agent is mixed in the concrete according to 8% by mass of the cement content in the cement concrete, and made into 10 test blocks, and the average index for detecting the performance of the 10 test blocks is: Degree (specific surface area): 347m 2 / kg, setting time: initial setting 130min, final setting 270min, limiting expansion rate: 7d 0.026% 28d-0.016%, compressive strength: 7d 26.8MPa 28d 46.1MP...

Embodiment 2-17

[0030] The raw materials and quality used in embodiment 2-17 are as shown in table 1 below, and its preparation method and detection method are identical with embodiment 1; Table 1 below shows the concrete raw material and quality used in embodiment 1-17 Wherein the cement described in embodiment 4-10 is 32.5 grade ordinary Portland cement, and described fly ash is I grade fly ash (according to GB / T 1596-2005 national standard). The following table 2 shows the detection data of the high-performance concrete inorganic environmental protection waterproof expansion agent obtained in Examples 1-17 after use. As can be seen from the detected data, the high-performance concrete inorganic environmental protection waterproof expansion agent of the present invention has high efficiency. Waterproof, moisture-proof, expansion, anti-crack, anti-seepage and other functions, no corrosion effect on steel bars, and can achieve permanent structural self-waterproof, which is a major technologica...

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Abstract

The invention discloses a concrete inorganic environmental waterproof expanding agent and its preparation method. The concrete inorganic environmental waterproof expanding agent comprises the following ingredients: 15-25wt% of cement, 0.1-0.5 wt% of aluminum sulfate, 3.5-6.5wt% of potassium aluminum sulfate, 1.0-2.5wt% of ferrous sulphate, 0.1-0.3wt% of sodium chloride, 0.1-0.3wt% of urea, 0.1-0.3wt% of sodium sulfate, 35-45wt% of gypsum and 25-35 wt% of coal ash. The preparation method comprises the steps of taking raw materials, making the raw materials into powder, mixing the powder, stirring uniformly and the like. The expanding agent disclosed in the invention has the functions of efficient waterproofing, damp-proofing, expansion, crack resistance, permeability resistance and the like, without corrosion effects on steel bars, with low cost, and is suitable for waterproofing of various concretes.

Description

technical field [0001] The invention relates to a building material and a preparation method thereof, in particular to a high-performance concrete inorganic environmental protection waterproof expansion agent and a preparation method thereof, which is mainly used as an admixture for waterproofing, moisture-proof, seepage and crack resistance of cement concrete. Background technique [0002] During the project, many building basements, roofs, roads, and bridges could not reach the designed service life, and some projects were severely damaged after only a few years of use and had to be repaired. The main reason is that the current waterproof materials and concrete Agents generally contain Cl-,,,,, K+,,, Na+ ions too heavy, when added to concrete, react with active silica in concrete to form alkali silicate gel and cause concrete expansion and cracking, which is The common alkali-aggregate reaction in engineering also accelerates the corrosion of steel bars, resulting in concr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/12
CPCC04B40/0039Y02W30/91C04B7/00C04B18/08C04B22/124C04B22/143C04B22/147C04B22/148C04B22/149C04B24/126C04B28/02
Inventor 王福刚汪永安王传成袁诗林
Owner 王福刚
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