Efflorescence-resistant concrete and preparation method thereof

A technology for concrete and efflorescence resistance, applied in the field of building materials, can solve the problems such as hindering free diffusion of free calcium ions in concrete, unsatisfactory effect of anti efflorescence measures, affecting the compressive strength of concrete, etc. The effect of inhibiting the phenomenon of efflorescence and good workability

Active Publication Date: 2021-02-12
GUANGDONG BOZHILIN ROBOT CO LTD
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0004] The traditional anti-pantherine measure is to add redispersible latex powder, cellulose ether, etc. to the concrete. For example, the redispersible latex powder can reduce the number of free calcium ions by complexing part of the free calcium ions, thereby reducing the risk of pan-alkaline phenomenon. occur; cellulose ether hinders the free diffusion of free calcium ions inside the concrete through thickening and cohesion, and then plays a role in inhibiting concrete efflorescence; however, the effect of traditional anti-efflorescence measures is not ideal, on the one hand , the improvement effect on concrete efflorescence is limited. Even if redispersible latex powder and cellulose ether are added, after a period of humidification and curing, obvious efflorescence will still occur. This phenomenon is more obvious in colored concrete; On the other hand, adding redispersible latex powder and cellulose ether will affect the compressive strength of concrete

Method used

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  • Efflorescence-resistant concrete and preparation method thereof

Examples

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preparation example Construction

[0082] A preparation method of anti-efflorescence concrete, comprising the following steps:

[0083] Mixing cement, aggregates and admixtures to prepare dry materials;

[0084] Mix acrylate functional agent, water reducing agent and water to prepare liquid material;

[0085] mixing said dry material and liquid material;

[0086] The weight part of the cement is 8-25 parts; the weight part of the aggregate is 60-90 parts; the weight part of the admixture is 2-6 parts; the weight part of the acrylate functional agent is 0.01 -0.4 part; The weight part of described water reducer is 0.1-0.3 part;

[0087] The acrylate functional agent is selected from acrylate monomers and / or acrylate polymers.

[0088] Preferably, after mixing the dry material and the liquid material, they are forced to stir to form a mixture with good fluidity.

[0089] To use, pour the mixture into the mold.

[0090] It can be understood that forced stirring can be carried out in a forced mixer. In a force...

Embodiment 1

[0095] This embodiment provides a kind of anti-efflorescence concrete and its preparation method and use method, the steps are as follows:

[0096] In parts by weight, weigh 15 parts of white cement, 0.5 part of inorganic pigment, 3 parts of white silica fume, 35 parts of sand, 39 parts of stone, 7 parts of water, 0.2 part of calcium polyacrylate, and 0.3 part of water reducer.

[0097] Mix cement, inorganic pigments, white silica fume, sand and stones to obtain dry materials.

[0098] Mix water reducing agent, water and calcium polyacrylate to obtain liquid material.

[0099] Mix the dry material and the liquid material and forcefully stir to form a mixture with good fluidity, which is the anti-efflorescence concrete.

[0100] When in use, inject the above-mentioned pan-alkali-resistant concrete into the mould.

Embodiment 2

[0102] This embodiment provides a kind of anti-efflorescence concrete and its preparation method and use method, the steps are as follows:

[0103] In parts by weight, weigh 12 parts of white cement, 0.2 parts of inorganic pigment, 2 parts of white silica fume, 38 parts of sand, 42 parts of stone, 4.5 parts of water, 0.1 part of magnesium acrylate, and 0.1 part of water reducer.

[0104] Mix cement, inorganic pigments, white silica fume, sand and stones to obtain dry materials.

[0105] Mix water reducing agent, water and magnesium acrylate to obtain liquid material.

[0106] Mix the dry material and the liquid material and forcefully stir to form a mixture with good fluidity, which is the anti-efflorescence concrete.

[0107] When in use, inject the above-mentioned pan-alkali-resistant concrete into the mould.

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Abstract

The invention relates to efflorescence-resistant concrete and a preparation method thereof, relating to the field of building materials. The efflorescence-resistant concrete is prepared from the following raw materials in parts by weight: 8-25 parts of cement; 60-90 parts of an aggregate; 2-6 parts of an admixture; 0.01-0.4 part of an acrylate functional agent, and 0.1-0.3 part of a water reducingagent; and water; wherein the acrylate functional agent is selected from acrylate monomers and/or acrylate polymers. According to the efflorescence-resistant concrete disclosed by the invention, theefflorescence phenomenon of the concrete can be effectively improved on the basis of not influencing the compressive strength of the concrete, and meanwhile, the construction performance is good.

Description

technical field [0001] The invention relates to the field of building materials, in particular to anti-efflorescence concrete and a preparation method thereof. Background technique [0002] Effervescent alkali is a common problem in concrete. It affects the appearance of concrete products, limits the popularization and application of cement-based decorative concrete, reduces the durability of concrete, and causes structural safety hazards. [0003] Some researchers have summarized the surface efflorescence process of cement-based decorative concrete: the soluble salt inside the concrete dissolves in water, migrates to the surface with the capillary pores inside the concrete, and precipitates white crystals on the surface of the concrete, or reacts with CO in the air. 2 and so on to form a white precipitate. Soluble salts in concrete include two types: one is soluble salts contained in raw materials such as cement, sand, stones and admixtures, such as CaCO 3 , CaSO 4 2H ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/2023C04B2111/82C04B18/146C04B14/06C04B14/02C04B2103/302C04B24/2641C04B2103/54C04B24/04
Inventor 李朗唐振中向青云
Owner GUANGDONG BOZHILIN ROBOT CO LTD
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