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Pumping antifreezing agent for concrete and preparation method thereof

A concrete pump and antifreeze technology, which is applied in the field of building materials, can solve the problems of insufficient early strength and poor antifreeze performance of antifreeze, and achieve the effects of increasing compactness and strength, enhancing antifreeze performance, and improving early strength

Inactive Publication Date: 2017-09-22
朱文杰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a concrete pumping agent and its preparation method in view of the defects of poor antifreeze performance and insufficient early strength of the currently used concrete pumping antifreeze agent

Method used

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  • Pumping antifreezing agent for concrete and preparation method thereof

Examples

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example 1

[0019] Weigh 100g of paraffin and add it to the beaker, and move the beaker into a digital speed measuring constant temperature magnetic stirrer, stir for 30min at a temperature of 85°C and a speed of 200r / min. After the paraffin is melted, add 300g of nano Iron powder, continue to stir and mix for 10 minutes to obtain a mixture, take 40g of aluminum nitrate, 100g of ethyl orthosilicate and 300mL of 75% ethanol solution into the beaker, stir and mix for 3 minutes, then add 100mL of 25% ammonia water , and move the beaker into a water bath, control the temperature of the water bath to 70°C, and react for 40 minutes under the conditions of a rotating speed of 200r / min. After the reaction is completed, filter to obtain a filter residue, which is placed in an oven and dried at 95°C until constant Weight, to obtain dry matter, finally in parts by weight, take 3 parts of azodicarbonamide, 1 part of boric acid, 8 parts of the mixture, 15 parts of ethylene glycol and 0.3 part of carbox...

example 2

[0021] Weigh 100g of paraffin and add it to the beaker, and move the beaker into a digital speed measuring constant temperature magnetic stirrer, stir for 30min at a temperature of 85°C and a speed of 200r / min. After the paraffin is melted, add 300g of nano Iron powder, continue to stir and mix for 10 minutes to obtain a mixture. At the same time, take 30g of lignin, 200mL of water and 25g of triethanolamine and add them to a three-necked flask with a thermometer and a reflux device. Place the flask in a water bath and control the temperature of the water bath to 115°C , after stirring and mixing for 3 minutes, add 15 mL of epichlorohydrin, stir and react for 60 minutes, filter after the reaction to obtain a filter residue, wash the filter residue with water 3 times to obtain modified lignin, and finally take 3 parts by weight. Nitrogendiformamide, 1 part of boric acid, 8 parts of the mixture, 6 parts of modified lignin, 15 parts of ethylene glycol and 0.3 parts of carboxymethy...

example 3

[0023] Weigh 100g of paraffin and add it to the beaker, and move the beaker into a digital speed measuring constant temperature magnetic stirrer, stir for 30min at a temperature of 85°C and a speed of 200r / min. After the paraffin is melted, add 300g of nano Iron powder, continue to stir and mix for 10 minutes to obtain a mixture. At the same time, take 30g of lignin, 200mL of water and 25g of triethanolamine and add them to a three-necked flask with a thermometer and a reflux device. Place the flask in a water bath and control the temperature of the water bath to 115°C , after stirring and mixing for 3 minutes, add 15 mL of epichlorohydrin, stir and react for 60 minutes, filter after the reaction to obtain a filter residue, wash the filter residue with water 3 times to obtain modified lignin, take 40 g of aluminum nitrate, 100 g of ethyl orthosilicate Add 300mL of ethanol solution with a mass fraction of 75% into the beaker, stir and mix for 3 minutes, then add 100mL of ammonia...

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Abstract

The invention discloses a pumping antifreezing agent for concrete and a preparation method thereof, and belongs to the technical field of building materials. The pumping antifreezing agent is prepared from the following raw materials in parts by weight: 3 to 5 parts of azodicarbonamide, 1 to 3 parts of boric acid, 8 to 12 parts of mixture, 6 to 8 parts of modified lignin, 15 to 20 parts of ethylene glycol, 0.3 to 0.5 part of carboxymethylcellulose and 3 to 5 parts of dried matter. The pumping antifreezing agent is a chloride-free pumping antifreezing agent; the pumping antifreezing agent has the advantages that the antifreezing performance of the concrete is greatly improved, the early strength is obvious, the later strength of the concrete is highly amplified and the adaptability is good, and has better economic benefit and social benefit.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a concrete pumping antifreeze agent and a preparation method thereof. Background technique [0002] In large-scale construction projects, not only modern construction technology and construction methods are required, but also technical performance requirements for various functions are put forward for concrete. For example, commercial concrete for winter construction and pumping concrete for high-rise buildings are required Its good working performance requires concrete to have antifreeze performance, such as large flow state, good slump retention, early strength, and good reinforcement effect. Especially the early strength can shorten the time for concrete insulation and curing. In different environmental projects, according to different functional needs, winter construction requires concrete to have early strength or strength at various ages. All these t...

Claims

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Application Information

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IPC IPC(8): C04B24/42
CPCC04B40/0039C04B2103/601C04B24/129C04B22/0013C04B24/08C04B14/34C04B24/02C04B24/383C04B24/00C04B24/122C04B24/005C04B22/085C04B24/42C04B22/06
Inventor 许双健宋玲
Owner 朱文杰