A kind of preparation method of high-strength Portland cement product

A Portland cement, high-strength technology, used in the field of building materials manufacturing, can solve problems such as damage, accelerated steel corrosion, and failure to reach the designed service life

Active Publication Date: 2017-03-01
XINGNING LONGJIANG BUILDING MATERIAL IND CO LTD
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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

[0028] A preparation method of high-strength Portland cement products, characterized in that:

[0029] 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.

[0030] The preparation method steps of the Portland cement composite additive are:

[0031] Step ...

Embodiment 2

[0036] A preparation method of high-strength Portland cement products, characterized in that:

[0037] 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.

[0038] The preparation method steps of the Portland cement composite additive are:

[0039] Step (1...

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Abstract

The invention discloses a method for preparing a high-strength silicate cement product. The method comprises the following steps: weighing the raw materials including silicate cement, silicate cement composite additive, sand, polypropylene fibre, and naphthalene water reducer; putting the raw materials into a tapered double helix stirrer to uniformly stir for 50 minutes, and maintaining for three times. The silicate cement product has effective waterproof, damp-proof, expanding, crack-resistant and leak-resistant functions.

Description

technical field [0001] The invention relates to a preparation method of a high-strength Portland cement product, 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 deficiencie...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C04B28/04C04B24/38
Inventor曾宪东
OwnerXINGNING LONGJIANG BUILDING MATERIAL IND CO LTD