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Compound antifreeze and antifreeze pumping agent

A technology of antifreeze and pumping agent, applied in the field of concrete plus pumping agent, can solve the problem of not being fully suitable for preparing antifreezing pumping agent, etc., achieve good antifreeze effect, improve later strength, and prevent concrete freeze damage.

Active Publication Date: 2017-12-22
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned defects and problems of the prior art, the purpose of the embodiment of the present invention is to provide a composite antifreeze agent and an antifreeze pumping agent, which solves the problem of water reducing agents based on naphthalene, sulfamate and aliphatic water reducers. The preparation technology of liquid antifreeze pumping agent is not completely suitable for the technical problem of preparing liquid antifreeze pumping agent based on polycarboxylate superplasticizer

Method used

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  • Compound antifreeze and antifreeze pumping agent
  • Compound antifreeze and antifreeze pumping agent
  • Compound antifreeze and antifreeze pumping agent

Examples

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Embodiment 1

[0040] The compound antifreeze agent of the embodiment 1 of the present invention is the mixture that salt component and organic solvent component are mixed; Wherein, described salt component is the mixture of calcium nitrate, calcium formate and sodium thiosulfate, and described The organic solvent component is an alcohol with 1 to 3 carbon atoms. The organic solvent component adopts one kind of alcohol, or the mixture of two kinds of alcohols. A mixture of two alcohols is preferred, eg a mixture of methanol and ethylene glycol.

[0041] The mixture of calcium nitrate, calcium formate and sodium thiosulfate, and organic solvent can be applied to the liquid antifreeze pumping agent based on polycarboxylate superplasticizer.

[0042] As a preferred embodiment, the compound antifreeze is, in parts by weight, a mixture of 3 to 6.5 parts of salt components and 1 to 3 parts of organic solvent components; wherein, in the salt components, calcium nitrate 1.5 to 3 parts, 0.5 to 1 pa...

Embodiment 2

[0049] The antifreeze pumping agent of embodiment 2 of the present invention is to comprise the mixture of polycarboxylate water reducer, air-entraining agent, retarder and water, and the compound antifreeze described in the above-mentioned embodiment 1; Wherein, with antifreeze pumping Based on the total mass of the antifreeze agent, the mass percentage of the composite antifreeze agent is 6% to 10%.

[0050] The antifreeze effect of the antifreeze pumping agent of the present invention can be achieved by adopting the proportion of the existing pumping agent based on polycarboxylate superplasticizer for other components, and the adaptability to cement is good.

[0051] Specifically, embodiment 2 of the present invention provides the prescription of preferred antifreeze pumping agent, as follows:

[0052] Antifreeze pumping agent, by mass percentage, includes 15% to 20% polycarboxylate superplasticizer, 0.08% to 0.15% air-entraining agent, 0.5% to 1.0% retarder, 6% to 10% The...

Embodiment 3

[0055] This embodiment 3 is based on the antifreeze pumping agent in embodiment 2, and optimizes the selection of the polycarboxylate water reducer therein. The polycarboxylate water reducer is a composite polycarboxylate water reducer that is a mixture of high water reducing type polycarboxylate water reducer, high slump retention type polycarboxylate water reducer and early strength type polycarboxylate water reducer; control The solid content of the composite polycarboxylate water reducer is 35%-45%. Specifically, the mixing mass ratio of the high water-reducing polycarboxylate water-reducer, the high-slump-holding polycarboxylate water-reducer and the early-strength polycarboxylate water-reducer is 7:3:1 in sequence. Three kinds of water-reducing agents with different properties were mixed and stirred in proportion to prepare a composite polycarboxylate water-reducer solution with a solid content of 40% and a high water-reducing rate, good slump retention effect, and remar...

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Abstract

The invention provides a composite antifreeze agent and an antifreeze pumping agent. The composite antifreeze is a mixture of salt components and organic solvent components; the salt component is a mixture of calcium nitrate, calcium formate and sodium thiosulfate, and the organic solvent component is alcohol. And an antifreeze pumping agent comprising the above-mentioned compound antifreeze. Composite antifreeze is a liquid antifreeze compounded with organic, inorganic early strength and antifreeze components. It has good antifreeze effect and can effectively improve the later strength of concrete in winter construction. The antifreeze pumping agent containing the compound antifreeze has antifreeze effect, good adaptability to cement, low concrete slump loss over time, good antifreeze effect, and much higher compressive strength ratio at the specified temperature -10°C in standard requirements. It is suitable for concrete pumping construction in winter in the north. It can be used for commercial ready-mixed pumped concrete, and can also be used for on-site mixing pumped concrete.

Description

technical field [0001] The invention relates to the technical field of pumping agent added to concrete, in particular to a composite antifreeze agent and an antifreeze pumping agent. Background technique [0002] Antifreeze and pumping agents are necessary admixtures for concrete pumping construction in winter in the north. Most commercial concrete mixing plants combine antifreeze components and pumping components together and use them in the form of liquid antifreeze pumping agents. Since polycarboxylate superplasticizers have only been popularized and applied in commercial concrete mixing stations in recent years, most of the water-reducing components used in the preparation technology of liquid antifreeze pumping agents are naphthalene-based high-efficiency water-reducers, aliphatic-based High-efficiency water reducer, or the combined use of naphthalene-based and sulfamate-based high-efficiency water-reducers, the combined use of aliphatic and sulfamate-based high-efficie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/04C04B24/02C04B22/14C04B22/08C04B24/24
Inventor 何廷树徐一伦王玥钱强
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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