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Concrete complex additive

A technology for compounding admixtures and concrete compositions, applied in the field of concrete admixtures, can solve a single problem, and achieve the effects of improving strength and friction resistance, excellent waterproof performance, and enhancing impact resistance.

Inactive Publication Date: 2012-12-19
JIANGSU FENGTAI TOOLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Traditional concrete admixtures often only have a single function, such as waterproofing agent, which can only improve the waterproofing function of concrete, and to prolong the setting time of concrete, additional retarder must be added

Method used

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  • Concrete complex additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Preparation of admixture 1 of the present invention

[0023] Methacrylic acid / methyl acrylate copolymer: 22.5wt%, Amide: 28.5wt%, Octyltriethoxysilane: 0.75wt%, Polymethyltriethoxysilane: 0.25wt%, Silicone reinforcement (e.g. C 12 h 25 N(EO) 7 (PO) 5 H): 1.2wt%, polyacrylamide: 7.5wt%, triethanolamine: 1.2wt%, sodium nitrite: 3.2wt%, ethylene glycol: 0.5wt%, glycerol: 0.8wt%, sodium gluconate: 3.2 wt% and balance water.

Embodiment 2

[0025] Preparation of admixture 2 of the present invention

[0026] Methacrylic acid / methyl acrylate copolymer: 26.5wt%, Amide: 18.5wt%, Octyltriethoxysilane: 0.6wt%, Polymethyltriethoxysilane: 0.2wt%, Silicone reinforcement (e.g. C 12 h 25 N(EO) 7 (PO) 5 H): 1.8wt%, polyacrylamide: 12.5wt%, triethanolamine: 1.5wt%, sodium nitrite: 3.5wt%, ethylene glycol: 0.75wt%, glycerol: 0.8wt%, sodium gluconate: 3.8 wt% and balance water.

Embodiment 3

[0028] Concrete is prepared by using cement, water, fine aggregate, coarse aggregate and the compound admixture of the present application.

[0029] First, the essential components of the concrete composition of the present invention will be described.

[0030] Relative to the mass of cement, the amount of the above-mentioned composite admixture is preferably not less than 0.05wt%, but not more than 2.2wt%. When the added amount is less than 0.25wt%, satisfactory performance cannot be obtained, and when a high amount of more than 2.2wt% is used, the obtained effect will be basically saturated, and economic disadvantages may be borne. More preferably, the added amount is not more than 1.5wt%, not less than 0.15wt%. The above-mentioned admixtures can be mixed in the above-mentioned additive amount, and the addition in this form will produce various beneficial effects, such as reducing the unit moisture content, increasing strength and improving durability, frost resistance, imp...

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Abstract

The invention provides a concrete complex additive which comprises the following components by weight percent: 17.5-58.0% of efficient water reducing agent, 0.5-5.5% of organosilicon waterproofing agent, 0.2-2.5% of organosilicon reinforcing agent, 3.5-25% of polyacrylamide, 1.2-2.8% of triethanolamine, 3.2-6.3% of sodium nitrite, 0.3-1.2% of glycol, 0.6-1.3% of glycerol, 2.8-5.5% of sodium gluconate and the balance of water. The impact resistance, crocking resistance, impermeability and waterproofness of the concrete material can be obviously improved by using the complex additive provided by the application in the preparation process of the concrete, thus the concrete complex additives is especially suitable for the requirement on high-performance concrete for construction of airfield runways or highway bridges.

Description

technical field [0001] The invention relates to a concrete admixture, and more specifically, the invention relates to a composite admixture used in concrete for airport runways or expressway bridges. Background technique [0002] Concrete composition can be prepared by blending cement, water, fine aggregate and coarse aggregate, and in cement composition, the strength and durability of the cured product obtained from concrete composition compared with cement slurry and mortar Both dominate. Therefore, such compositions are being widely and satisfactorily used in applications such as building structures. In said concrete compositions, lowering the water content per unit volume of concrete will result in improved properties of the cured product. In the current concrete industry, there is a strong need to improve the strength and durability of concrete structures, and therefore, efforts to reduce the moisture content per unit have become an important task. In general, in con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/42
Inventor 徐福明邱瑜铭
Owner JIANGSU FENGTAI TOOLS
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