Durable type three-expansion source cement expansive material

A technology of expansion agent and concrete, applied in the field of concrete expansion agent, can solve the problem of insufficient durability of concrete expansion agent, and achieve the improvement of sulfate corrosion resistance and carbonization resistance, safety and durability, and low alkali content. Effect

Inactive Publication Date: 2009-06-17
广西云燕特种水泥建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a durable concrete expansion agent with three expansion sources, which can solve the insufficient durability requirements of existing concrete expansion agents

Method used

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  • Durable type three-expansion source cement expansive material
  • Durable type three-expansion source cement expansive material
  • Durable type three-expansion source cement expansive material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] (1), the preparation process formula is shown in Table 1:

[0063] Table 1 (unit: kg)

[0064]

[0065] (2) Preparation process:

[0066] The bulk raw material gypsum, high alumina clinker, high calcium sulfur aluminum clinker and calcined magnesite are passed through the → the second silo → the second homogenization silo → get ordinary expansion agent → prepare external admixtures according to Table 1, externally mix air-entraining agent K12, silica fume, zeolite powder and water-repellent sodium stearate → mix in The third mill→the third storage hopper→the third homogenization storage→durable concrete expansion agent with three expansion sources→packing hopper→packing machine→warehouse→testing→delivery.

[0067] (3) The inspection data is shown in Table 2:

[0068] Table 2

[0069]

Embodiment 2

[0071] (1), the preparation process formula is shown in Table 3

[0072] Table 3 (unit: kg)

[0073]

[0074] (2), preparation process:

[0075] The bulk raw material gypsum, high alumina clinker, high calcium sulfur aluminum clinker and calcined magnesite are passed through the → the second silo → the second homogenization silo → get ordinary expansion agent → prepare external admixtures according to Table 1, externally mix air-entraining agent K12, silica fume, zeolite powder and water-repellent sodium stearate → mix in The third mill→the third storage hopper→the third homogenization storage→durable concrete expansion agent with three expansion sources→packing hopper→packing machine→warehouse→testing→delivery.

[0076] (3) The inspection data is shown in Table 4:

[0077] Table 4

[0078]

[0079] Only two examples have been cited above, and the products prepared within the range of raw material ratio in actual production can meet the quality requirements.

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Abstract

The invention discloses durable three expansion source concrete expanding agent, which is characterized by comprising anhydrite, high-aluminum clinker, high calcium-sulfur-aluminum clinker, calcined magnesite and the like as the preparation raw materials according to a weight proportion, in addition, the raw materials are added with air entraining agent K12, siliceous dust, zeolite powder and water repellent sodium stearate. A preparation method comprises steps of crushing, common blending, blended powder grinding and external finished product blending. The expanding agent has low alkali content, has certain expansibility, and improves cracking resistance and impermeability of concrete. The expanding agent after being added into the concrete can remarkably improve compactness, impermeability, anti-scouring property and abrasion-resisting property of the concrete, reduces permeability and water absorption greatly so that the concrete has higher self-defending capability and environmental medium erosion resistance, improves sulphate erosion resistance and carbonizing resistance of the concrete greatly, is favorable for improving safety and durability of the reinforced concrete, and is suitable for various concretes.

Description

technical field [0001] The present invention relates to concrete, especially concrete expansive agent. technical background [0002] With the large-scale application of commercial and high-performance concrete in my country, the prominent contradiction is that the probability of cracks in concrete engineering increases, and harmful cracks are directly related to the durability of structures. Commercial housing has involved people's livelihood issues, and users have strongly responded to this. In recent years, the Ministry of Construction and engineering circles have attached great importance to the control of concrete cracks. From the material point of view, concrete expansion agent, shrinkage reducer, steel fiber and synthetic organic fiber are all effective measures to reduce or disperse cracks, but in terms of material price and construction convenience, expansion agent has more advantages. Academician Wu Zhongwei of my country pointed out that "micro-cracks to visible c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/08C04B22/14
CPCC04B2111/00146C04B2111/00293C04B2111/2038C04B22/008C04B2111/343C04B40/0039Y02W30/91C04B7/32C04B7/323C04B11/06C04B14/047C04B18/146C04B24/04C04B28/02C04B18/141C04B22/066C04B24/16
Inventor 李光达黄芳许建兴
Owner 广西云燕特种水泥建材有限公司
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