Concrete inorganic environmental waterproof expanding agent and preparation method thereof

A technology of concrete and expansion agent, which is applied in the field of cement concrete waterproof, moisture-proof, impermeable and crack-resistant admixture, concrete inorganic waterproof expansion agent and its preparation field, can solve problems such as damage, accelerated corrosion of steel bars, and failure to reach the designed service life.

Inactive Publication Date: 2013-04-10
王福刚
View PDF2 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Concrete inorganic environmental waterproof expanding agent and preparation method thereof
  • Concrete inorganic environmental waterproof expanding agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

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 the concrete inorganic waterproof expansion agent.

[0028] The prepared concrete inorganic waterproof expansion agent is mixed in the concrete according to 8 mass % of the cement content in the cement concrete, and made into 10 test blocks, and the average index of detecting the various performances of the 10 test blocks is: fineness (ratio 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 46.1MPa, penetration height ratio: 31%, water absorption ratio: 66%, Corrosion eff...

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 concrete inorganic waterproof expansion agent that embodiment 1-17 obtains after use, as can be seen from the detected data, the concrete inorganic waterproof expansion agent of the present invention has high-efficiency waterproof, moisture-proof, expansion, Anti-cracking, anti-seepage and other functions, no corrosion effect on steel bars, and can achieve permanent structural self-waterproof, which is a major technological breakthrough in building waterproof materials.

[0031] Table 1

[0032] ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
Login to View More

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 concrete inorganic 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 concrete cracking and water seepage. Contents...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityPatents(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