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LC-01 type foam concrete foamer

A foamed concrete and foaming agent technology, which is used in the field of concrete additives and high-efficiency air-entraining agents for concrete, can solve the problem that the output of foamed concrete is reduced, the chemical properties of cement and fly ash slurry are not considered, and the foaming agent stays at the foaming multiple. Problems such as the length of foam stabilization time

Inactive Publication Date: 2010-02-03
LUOYANG NORMAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, there are still many people in the industry who still judge the quality of blowing agents based on the foaming ratio, bleeding and the stability time of the foam alone.
Experimental facts have proved that when foam exists alone, even if its half-life can reach several days, it cannot guarantee that it will not break a large amount of foam when it contacts cement and fly ash slurry, nor can it guarantee that it will not affect the setting of concrete
In addition, there is another misunderstanding in the current research on foaming agents, that is, they only go around in the circle of conventional surfactants and foam stabilizers, without considering the chemical characteristics of cement and fly ash slurry. Only focus on finding surfactants with good foaming properties and foam stabilizers that can be compatible with them and increase the viscosity of the foam surface
As a result, the surface viscosity of the foam is small and the expansion ratio is high, but the foam is severely broken when it contacts cement and fly ash slurry, and the surfactant after the foam breaks is adsorbed on the surface of cement and fly ash particles, which seriously affects the coagulation of cement ; The surface viscosity of the foam is large, although it is rarely broken when it contacts cement and fly ash slurry, the foaming ratio is significantly reduced, and the output of foamed concrete per unit mass of foaming agent is reduced
In short, unreasonable evaluation criteria and incorrect ideas for foam concrete foaming agents have caused people to fail to find a foaming agent with superior performance for a long time.

Method used

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  • LC-01 type foam concrete foamer
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] raw material

[0018] (1) NaOH (99.0%, Tianjin) 37.5~38mol

[0019] (2) Succinic acid (industrial product, 95%, Anhui) 1.8~2.4mol

[0020] (3) Borax (industrial product, 95%, Shanghai) 1.9~2.1mol

[0021] (4) Triethanolamine (industrial product, 85%, Xingtai, Hebei) 2~8mol

[0022] (5) Rosin (industrial product, grade two, Guangxi) 18~22mol

[0023] (6) AES (sodium fatty alcohol polyoxyethylene ether sulfate, 70%, Jilin) ​​28~32mol

[0024] (7) 6501 (coconut oil fatty acid diethanolamide (1:1), 95%, Guangdong) 0~0.1mol

[0025] (8) Hydrogen peroxide (27.5%, industrial product, Shandong) 0~0.1mol

[0026] resolve resolution

[0027] Mix raw materials 1, 2, 3, and 4 in proportion, add a certain amount of water (soft water or distilled water, the same below) and heat to dissolve, and continue to react for 1 hour to obtain intermediate product 9. Weigh raw materials 1 and 5 in proportion. Material 1 was dissolved in water. Heat raw material 5 to melt it completely,...

Embodiment 2

[0029] The raw material 1 in the embodiment 1 is changed into anhydrous or sodium carbonate decahydrate, calculate their consumption according to the principle that the molar quantity of its neutralized H+ is identical with sodium hydroxide; Adjust accordingly. Other raw materials, quantity and technological condition are constant, can obtain product LC-01 foam concrete blowing agent of the present invention equally. Compared with Example 1, its advantage is that sodium carbonate is relatively cheap, and its active ingredient is easy to determine. The disadvantage is that in the production process of the intermediate product 10, the solution of raw material 1 should be added carefully to prevent "overfilling the pot".

Embodiment 3

[0031] The raw material 2 in Example 1 is changed to malonic acid or adipic acid, and the molar quantity added is the same as that of succinic acid; the amount of make-up water for finally washing the relevant containers should also be adjusted accordingly. Other raw materials, quantity and technological condition are constant, can obtain product LC-01 foam concrete blowing agent of the present invention equally. Compared with succinic acid, malonic acid is currently more expensive; adipic acid needs to be imported, and its price is comparable to succinic acid, but the effect of products with the same solid content is not as good as succinic acid.

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Abstract

The invention discloses an LC-01 type foam concrete foamer which belongs to a high-efficiency concrete air entraining agent. The invention adopts foaming time of the LC-01 type foam concrete foamer prepared form a double (multi) hydrophilic group surface active agent and a stabilizing agent; if the surface active agent and the stabilizing agent are diluted by the ratio of 1 to 100, 5.0 to 5.6m3 / kgis achieved; cement and powdery coal ash slurry are touched; the deforming rate is less than 12%; and four-stage foam concrete of more than 4m3 / kg can be produced; the cement is touched and defoamingis hardly operated; the four-stage foam concrete (containing 40% of powdery coal ash) which is larger than or equal to 3.5 to 3.8m3 / kg can be produced; and the compressive strength of the four-stagefoam concrete is from 1.2 to 1.5MPa. The invention better solves the contradiction between the foaming time of the foam concrete foamer and the stability when the foam comes into contact with the concrete slurry and enhances the production quantity and the compressive strength of the foam concrete for the foamer of each kilogram severalfold.

Description

technical field [0001] The invention relates to a foam concrete foaming agent composition, which belongs to concrete high-efficiency air-entraining agent and concrete additive in a broad sense. Background technique [0002] Foamed concrete, also known as foamed cement, is to introduce nitrogen, carbon dioxide, oxygen or air into the concrete slurry according to the application needs through chemical or physical means, and after molding and reasonable maintenance, it forms a large number of pores and has a certain strength. concrete products. Foam concrete is often graded according to density, that is, grade 3 is 300kg / m 3 , 400kg / m for grade 4 3 ,……. Lightweight foam concrete generally refers to grade 3-6 foam concrete. [0003] Foam concrete was first proposed by the Swiss in the 1930s, and was used in construction projects in the United States and the Soviet Union in the 1950s. my country began to introduce and apply this technology in the 1990s. Due to its light wei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/24C04B38/02C09F1/04
Inventor 王利亚李森兰王建平杜巧云路长发
Owner LUOYANG NORMAL UNIV
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