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Multifunctional auxiliary agent for magnesium oxychloride cement foamed concrete

A technology of foam concrete and multi-functional additives, which is applied in the field of building materials, can solve the problems of poor water resistance, uneven distribution of air bubbles, and unstable pouring molding of magnesium oxychloride cement, so as to achieve the improvement of pouring molding instability, low production cost, performance-reducing effect

Inactive Publication Date: 2015-07-15
SHENYANG JIANZHU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the present invention provides a method that better solves the problems of insufficient gas generation, uneven distribution of bubbles, unstable pouring molding and poor water resistance of magnesium oxychloride cement products when chemical foaming is used to produce foamed concrete, reducing the The bulk density of magnesium oxychloride cement foam concrete products after forming is a multifunctional additive for magnesium oxychloride cement foam concrete that improves the strength of foam concrete

Method used

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  • Multifunctional auxiliary agent for magnesium oxychloride cement foamed concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A multifunctional additive for magnesium oxychloride cement foam concrete, prepared from the following raw materials by weight percentage: 10% of powdery polycarboxylate high-efficiency water reducing agent with a water reducing rate of 35%, industrial salicylic acid with a content of 99% 20% acid, 18% ferrous sulfate heptahydrate with a content >92%, 18% magnesium sulfate with a content of 99%, 6% polypropylene short fiber (PP fiber), and 23% grade II fly ash.

[0022] The multifunctional auxiliary agent for magnesium oxychloride cement foam concrete of the present invention adopts a conventional preparation method, mixes the above-mentioned raw materials according to the formula ratio, and uses a three-roller dry powder mortar mixer to fully mix and evenly obtain the finished product of the auxiliary agent of the present invention.

[0023] When the present invention is used in the production of magnesium oxychloride foam concrete, the auxiliary agent of the present in...

Embodiment 2

[0025] A multifunctional additive for magnesium oxychloride cement foam concrete, which is prepared from the following raw materials by weight percentage: 5% of powdered polycarboxylate superplasticizer with a water reducing rate of 35%, and industrial water reducer with a content of 99%. 30% salicylic acid, 20% ferrous sulfate heptahydrate with a content >92%, 20% magnesium sulfate with a content of 99%, 10% polypropylene short fiber (PP fiber), 30% grade II fly ash.

[0026] When the present invention is used in the production of magnesium oxychloride foam concrete, the auxiliary agent of the present invention and light-burned magnesia are added to the mixer at the same time, and the dosage is 1.5% of the mass of light-burned magnesia. After stirring for 3 minutes with a slurry mixer, add an appropriate amount of Get good hydrogen peroxide. Others are the same as in Embodiment 1, and will not be repeated.

Embodiment 3

[0028] A multifunctional additive for magnesium oxychloride cement foam concrete, which is prepared from the following raw materials by weight percentage: 15% of powdered polycarboxylate superplasticizer with a water reducing rate of 35%, and industrial water reducer with a content of 99%. 10% salicylic acid, 5% ferrous sulfate heptahydrate with a content >92%, 5% magnesium sulfate with a content of 99%, 3% polypropylene short fiber (PP fiber), 15% grade II fly ash.

[0029] When the present invention is used in the production of magnesium oxychloride foamed concrete, the auxiliary agent of the present invention and light-burned magnesia are added to the mixer at the same time, and the dosage is 3% of the mass of light-burned magnesia. After stirring for 5 minutes with a slurry mixer, add an appropriate amount of Get good hydrogen peroxide. Others are the same as in Embodiment 1, and will not be repeated.

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Abstract

The invention discloses a multifunctional auxiliary agent for magnesium oxychloride cement foamed concrete. The multifunctional auxiliary agent is prepared from the following raw materials in percentage by weight: 5 to 15 percent of water reducing agent, 10 to 30 percent of retarding agent, 5 to 20 percent of water repellent agent, 5 to 20 percent of reinforcing agent, 3 to 10 percent of fiber and 15 to 30 percent of carrier. By adopting the multifunctional auxiliary agent, the problems that during the production of the foamed concrete through chemical foaming, the gas forming amount is insufficient, bubbles are not uniformly distributed, the molding by casting is unstable and the a magnesium oxychloride cement product is poor in water resistance are solved; by doping the multifunctional auxiliary agent, the volume weight of the foamed concrete can be reduced, the water resistance of the foamed concrete is improved, waste materials and toxic gases are not generated in production, and the foamed concrete does not have radioactivity; and the multifunctional auxiliary agent is an environment-friendly material which does not cause any pollution and damage to the ecological environment and human bodies, is simple in production process and low in production cost, and is an ideal multifunctional auxiliary agent.

Description

technical field [0001] The invention relates to an auxiliary agent, in particular to a multifunctional auxiliary agent for magnesium oxychloride cement foam concrete, which belongs to the field of building materials. Background technique [0002] Magnesium oxychloride cement has many advantages, such as light weight, fast setting and hardening, high strength, and non-combustibility. Used in foamed concrete can further reduce product bulk density and improve early strength. In recent years, it has been mostly used in construction products, decorative materials and marine fireproof boards, etc., but the performance of magnesium cement is not stable enough, and it has the disadvantages of easy moisture absorption, brine, deflection, and poor weathering resistance, especially in humid and water environments. Therefore, It is rarely used for external wall insulation. [0003] At present, magnesium oxychloride cement is used as a cementitious material in the production of domest...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/24
Inventor 戴民张鹤译牛晚扬
Owner SHENYANG JIANZHU UNIVERSITY