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Flame-retardant high-strength foam concrete and preparation method thereof

A foamed concrete, high-strength technology, used in the construction industry, can solve the problems of foamed concrete prone to shrinkage and cracking, affecting foam water absorption and waterproofness, and large shrinkage of mixed slurry, so as to promote secondary hydration reaction, The effect of changing surface properties and improving post-strength

Inactive Publication Date: 2018-10-09
上海天行新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main problem that the foamed concrete of prior art exists is: 1, because foamed concrete is mainly to be made up of cement and other silicon-calcium material, water, air bubble, its mixed slurry shrinkage rate is big; 2, tensile strength is lower, in Under limited conditions, foam concrete is prone to shrinkage and cracking; 3. Since the air bubble closure in foam concrete will affect the water absorption and water resistance of the foam, it is urgent to prepare foam concrete with light weight, high strength, waterproof and anti-cracking functions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 40 parts of cement, 20 parts of grade II fly ash, 30 parts of fine sand, 2 parts of inorganic flame retardant, 5 parts of silicate, 11 parts of expansion agent, 0.7 parts of foaming agent, 0.4 parts of foam stabilizer, water reducer 0.6 parts, 1.5 parts of early strength agent, 1.2 parts of water-repellent agent, 0.2 parts of fiber, 45 parts of water.

[0032] Preparation:

[0033] A. Weigh cement, Class II fly ash, fine sand, inorganic flame retardant, silicate, fiber according to the proportion and mix them uniformly to make dry powder;

[0034] B. Add expansion agent, foam stabilizer, water reducer, early strength agent, water repellent and water to the dry powder prepared in step A according to the proportion, and stir evenly at 900-1100rpm for 6-10min to prepare cement pulp;

[0035] C. Dilute 0.4-0.7 parts of foaming agent and water at a mass ratio of 1:35 to form a foaming liquid, and use a foaming machine to make the foaming liquid into foam;

[0036] D, acco...

Embodiment 2

[0040] 60 parts of cement, 30 parts of grade II fly ash, 15 parts of fine sand, 6 parts of inorganic flame retardant, 15 parts of silicate, 4 parts of expansion agent, 0.4 parts of foaming agent, 1.2 parts of foam stabilizer, water reducer 1.1 parts, 0.3 parts of early strength agent, 0.6 parts of water-repellent agent, 0.1 parts of fiber, 25 parts of water.

[0041] Preparation:

[0042] A. Weigh cement, Class II fly ash, fine sand, inorganic flame retardant, silicate, fiber according to the proportion and mix them uniformly to make dry powder;

[0043] B. Add expansion agent, foam stabilizer, water reducer, early strength agent, water repellent and water to the dry powder prepared in step A according to the proportion, and stir evenly at 900-1100rpm for 6-10min to prepare cement pulp;

[0044] C. Dilute 0.4-0.7 parts of foaming agent and water at a mass ratio of 1:35 to form a foaming liquid, and use a foaming machine to make the foaming liquid into foam;

[0045] D, acco...

Embodiment 3

[0049] 50 parts of cement, 25 parts of grade II fly ash, 25 parts of fine sand, 5 parts of inorganic flame retardant, 10 parts of silicate, 8 parts of expansion agent, 0.6 parts of foaming agent, 1 part of foam stabilizer, water reducer 0.8 parts, early strength agent 1.2 parts, water-repellent agent 1.1 parts, fiber 0.15 parts, water 30 parts.

[0050] Preparation:

[0051] A. Weigh cement, Class II fly ash, fine sand, inorganic flame retardant, silicate, fiber according to the proportion and mix them together evenly to make dry powder;

[0052] B. Add expansion agent, foam stabilizer, water reducer, early strength agent, water repellent and water to the dry powder prepared in step A according to the proportion, and stir evenly at 900-1100rpm for 6-10min to prepare cement pulp;

[0053] C. Dilute 0.4-0.7 parts of foaming agent and water at a mass ratio of 1:35 to form a foaming liquid, and use a foaming machine to make the foaming liquid into foam;

[0054] D. According to...

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Abstract

The invention provides flame-retardant high-strength foam concrete and a preparation method thereof. The foam concrete comprises the following components by mass: 40-60 parts of cement, 20-30 parts ofgrade-II fly ash, 15-30 parts of fine sand, 2-6 parts of an inorganic flame retardant, 5-15 parts of silicate, 4-11 parts of an expansion agent, 0.4-0.7 part of a foaming agent, 0.4-1.2 parts of a foam stabilizer, 0.6-1.1 parts of a water reducing agent, 0.3-1.5 parts of an early-strength agent, 0.6-1.2 parts of a water repellent, 0.1-0.2 part of fibers and 25-45 parts of water. The invention provides the flame-retardant high-strength foam concrete and the preparation method thereof; and the prepared foam concrete has high strength, flame retardation performance, water resistance and anti-cracking performance.

Description

technical field [0001] The invention belongs to the technical field of construction industry, and in particular relates to a flame-retardant high-strength foam concrete and a preparation method thereof. Background technique [0002] With the needs of building energy conservation and the requirements for fire protection grades of building insulation materials, developing new building energy-saving materials that meet the requirements of building energy conservation and fire protection grades has become the mission and work direction of special building materials researchers. [0003] As a new type of building energy-saving material, foam concrete is a foamy concrete material containing a large number of small, closed, and uniform pores inside. The pores inside the material are closed and do not communicate with each other, and cannot form convective circulation of air. Isolation, each spherical air hole is surrounded by a solidified cement slurry film, the interface forms a g...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B38/10C04B24/02C04B111/28
CPCC04B24/026C04B28/021C04B2111/28C04B2201/20C04B2201/50C04B18/08C04B14/06C04B22/0013C04B12/04C04B22/064C04B2103/48C04B2103/302C04B22/0093C04B24/42C04B20/0048C04B38/106
Inventor 徐俊赵生怡张云仁金建清
Owner 上海天行新型材料有限公司
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