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High slump retention and high strength slump retention agent and preparation method thereof

A slump-preserving agent and high-strength technology, applied in the field of concrete, can solve the problems of excessive concrete slump loss, and achieve the effects of increasing the slump-preserving function, delaying the slump loss speed, and reducing the shrinkage cracking rate.

Active Publication Date: 2017-01-18
JIANGXI PINGXIANG CITY LIANYOU BUILDING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Based on the above principles, there are many kinds of slump-preserving agents on the market, such as naphthalene-based superplasticizers, melamine superplasticizers, sugar-calcium superplasticizers, etc., but there is still the problem of rapid loss of concrete slump

Method used

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  • High slump retention and high strength slump retention agent and preparation method thereof
  • High slump retention and high strength slump retention agent and preparation method thereof
  • High slump retention and high strength slump retention agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Raw material ratio:

[0024] Acrylic polyoxyethylene ether 35%, self-made additives 15%, acrylic acid 5%, sodium methacrylate carboxypropyl sulfonate 2%, caustic soda 3%, water 40%.

[0025] Homemade additives: 15% acrylic acid, 5% ammonium persulfate, 80% water.

[0026] The preparation steps include: first, weighing the raw materials of each component according to the formula ratio; heating the water with half the formula ratio to 40°C, then adding polyoxyethylene acrylic acid ether and self-made additives to the water and stirring and mixing evenly; then the temperature of the mixture Raise the temperature to 50°C, add acrylic acid and stir to mix evenly, then raise the temperature of the reaction system to 60°C; keep the heated material in step (2) warm and mix and stir to react for 2 hours, then add carboxypropyl sulfonyl methacrylate dropwise Add the solution of sodium bicarbonate and water mixed with the other half of the formula ratio to the reaction system, an...

Embodiment 2

[0028] Raw material ratio:

[0029] Acrylic acid polyoxyethylene ether 40%, self-made additives 10%, acrylic acid 8%, sodium methacrylate carboxypropyl sulfonate 1%, caustic soda 1%, water 40%.

[0030] Homemade additives: 18% acrylic acid, 8% ammonium persulfate, 74% water.

[0031] The preparation method is the same as in Example 1.

Embodiment 3

[0033] Acrylic polyoxyethylene ether 32%, self-made additives 18%, acrylic acid 5%, sodium methacrylate carboxypropyl sulfonate 1%, caustic soda 1%, water 43%.

[0034] Homemade additives: 20% acrylic acid, 2% ammonium persulfate, 78% water.

[0035] The preparation method is the same as in Example 1.

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Abstract

The invention discloses a high-slump retaining and high-strength slump retaining agent. The high-slump retaining and high-strength slump retaining agent is characterized by being prepared from the following components in percentage by weight: 30-40% of acrylic polyoxyethylene ether, 10-20% of a self-made auxiliary, 1-10% of acrylic acid, 1-5% of sodium methacrylate carboxypropyl sulfonate, 1-5% of caustic soda flakes and 40-60% of water, totaling 100%. The high-slump retaining and high-strength slump retaining agent disclosed by the invention has the advantages of being slow in slump loss and effectively preventing shrinkage crack of concrete.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a high-slump-retaining agent for concrete (90min slump / expansion / mm210 / 380) and high strength (28-day strength up to 36.50MPa) and a preparation method thereof. Background technique [0002] With the needs of construction development, the requirements for concrete technology and dosage are getting higher and higher. During the use of concrete, its shrinkage and cracking rate must be strictly controlled to prevent potential safety hazards; (water reducing agent) to overcome the problem of high shrinkage cracking rate caused by concrete slump loss; because the root cause of concrete slump loss is the hydration reaction of cement, the hydration reaction of cement when it meets water, with the hydration reaction During the process of cement particle agglomeration, part of the free water is wrapped, and the other part of the free water is evaporated, which causes the free water in th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/16C08F290/06C08F220/06C08F220/04
Inventor 吴剑东周玉军肖艳飞陈大伟周友斌周敬萍
Owner JIANGXI PINGXIANG CITY LIANYOU BUILDING MATERIAL
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