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A kind of preparation method of high-strength cement product

A high-strength cement and product technology, applied in the field of building materials manufacturing, can solve the problems of cracking and water seepage of building materials, accelerated corrosion and damage of steel bars, etc.

Inactive Publication Date: 2015-07-29
杨华强 +6
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the project, the basements, roofs, roads and bridges of many buildings did not reach the designed service life, and some projects were seriously damaged after only a few years of use and had to be repaired. The main reason is that the current waterproof materials and cement plus The agent generally contains Cl-,,,,, and K+ ions are too heavy, and when added to the cement, it reacts with the active silica in the concrete to form an alkali silicate gel and cause the concrete to expand and crack. This is a common problem in engineering. Alkali-aggregate reaction, while accelerating the corrosion of steel bars, resulting in cracking and water seepage of building materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing high-strength cement products, characterized in that:

[0026] Weigh raw materials: Portland cement 282g, Portland cement composite additive 18g, sand 750g, polypropylene fiber 4g, naphthalene-based water reducing agent 3g; put the above raw materials into a conical double-helix mixer and stir evenly, and the stirring time is After stirring for 50 minutes, cast the mixture into the mold, carry out the first constant temperature curing at 70°C, demould after 18 hours of curing, and then carry out the second constant temperature curing, the temperature of the second constant temperature curing is 50°C, The second constant temperature curing time is 12 days, and then the third constant temperature curing is carried out. The temperature of the third constant temperature curing is 30°C. After 6 days, high-strength cement products are obtained.

[0027] The preparation method steps of the Portland cement composite additive are:

[0028] Step (1): 45 pa...

Embodiment 2

[0033] A method for preparing high-strength cement products, characterized in that:

[0034] Weigh raw materials: Portland cement 282g, Portland cement composite additive 18g, sand 750g, polypropylene fiber 4g, naphthalene-based water reducing agent 3g; put the above raw materials into a conical double-helix mixer and stir evenly, and the stirring time is After stirring for 50 minutes, cast the mixture into the mold, carry out the first constant temperature curing at 70°C, demould after 18 hours of curing, and then carry out the second constant temperature curing, the temperature of the second constant temperature curing is 50°C, The second constant temperature curing time is 12 days, and then the third constant temperature curing is carried out. The temperature of the third constant temperature curing is 30°C. After 6 days, high-strength cement products are obtained.

[0035] The preparation method steps of the Portland cement composite additive are:

[0036]Step (1): Accord...

Embodiment 3

[0041] A method for preparing high-strength cement products, characterized in that:

[0042] Weigh raw materials: Portland cement 282g, Portland cement composite additive 18g, sand 750g, polypropylene fiber 4g, naphthalene-based water reducing agent 3g; put the above raw materials into a conical double-helix mixer and stir evenly, and the stirring time is After stirring for 50 minutes, cast the mixture into the mold, carry out the first constant temperature curing at 70°C, demould after 18 hours of curing, and then carry out the second constant temperature curing, the temperature of the second constant temperature curing is 50°C, The second constant temperature curing time is 12 days, and then the third constant temperature curing is carried out. The temperature of the third constant temperature curing is 30°C. After 6 days, high-strength cement products are obtained.

[0043] The preparation method steps of the Portland cement composite additive are:

[0044] Step (1): Accor...

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Abstract

The invention discloses a preparation method of a high strength cement product. The preparation method is characterized by comprising the steps of weighing raw materials: 282g of silicate cement, 18g of silicate cement composite additives, 750g of sand, 4g of polypropylene fibers and 3g of naphthalene water reducers; adding the raw materials into a conical twin-screw stirrer for uniformly stirring and carrying out maintenance for three times while stirring for 50 minutes. According to the invention, the silicate cement product has the functions of being efficient, waterproof, moisture-proof, inflatable, crack-resistant, impervious, and the like.

Description

technical field [0001] The invention relates to a preparation method of high-strength cement products, belonging to the field of building material manufacturing. Background technique [0002] During the project, the basements, roofs, roads and bridges of many buildings did not reach the designed service life, and some projects were seriously damaged after only a few years of use and had to be repaired. The main reason is that the current waterproof materials and cement plus The agent generally contains Cl-,,,,, and K+ ions are too heavy, and when added to the cement, it reacts with the active silica in the concrete to form an alkali silicate gel and cause the concrete to expand and crack. This is a common problem in engineering. Alkali-aggregate reaction also accelerates the corrosion of steel bars, resulting in cracking and water seepage of building materials. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B24/38
Inventor 杨华强李秀成梁培录李春刚李琳张新放陈国松
Owner 杨华强
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