High-early-strength antifreezing polycarboxylic-acid composite water reducing agent and application thereof

A composite water-reducing agent and polycarboxylic acid-based technology, applied in the field of building materials, can solve the problem that it can only be controlled within a range of less than 5%, the wall body loses bearing capacity and thermal insulation performance, and the freeze-thaw resistance is not ideal, etc. problems, to achieve uniform and stable storage, good slump protection effect, and improved durability.

Active Publication Date: 2013-07-31
CHINA 19TH METALLURGICAL CORP CHENGDU CONSTR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its repeated occurrences cause serious damage to architectural structures
And only freezing without melting will also cause frost heave damage, resulting in cracking of the wall
The plaster falls off in pieces, and in severe cases, the wall can completely lose its bearing capacity and thermal insulation performance. The freeze-thaw cycle can cause severe weathering inside the building structure and lose its durability.
[0006] The application number is 201010571257.4, a low-cost concrete antifreeze pumping agent and its preparation method, which discloses a pumping agent with low cost and good antifreeze effect. However, its freeze-thaw resistance performance is not ideal. After freeze-thaw tests, Its mass loss rate is as high as 6%
The application number is 20071019297.2, a liquid, chlorine-free, early-strength antifreeze polycarboxylate composite water reducer and its preparation method, which discloses a chlorine-free, early-strength antifreeze polycarboxylate composite water reducer, but After the freeze-thaw test, the mass loss rate can only be controlled within the range of less than 5%.

Method used

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  • High-early-strength antifreezing polycarboxylic-acid composite water reducing agent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Example 1 Preparation of composite water reducer of the present invention

[0055] Take LonS-Mw water-reducing polycarboxylic acid mother liquor (acrylic acid, 40% solid content, manufacturer Sichuan Jilong Chemical Building Materials Co., Ltd., production batch number 20121207-0) 187.5kg, sodium lignosulfonate 15kg, water 536.1kg and mix After uniformity, sequentially add 21kg of triethanolamine, 150kg of sodium thiocyanate, 40kg of calcium nitrite, 50kg of glycerol, and 0.4kg of sodium lauryl sulfate (K12) and stir evenly to obtain the product. The dosage of the obtained composite water reducer is 1.6-2.1wt% of the cementitious material in the concrete.

Embodiment 2

[0056] Example 2 Preparation of composite water reducer of the present invention

[0057] Take LonS-Mw water-reducing polycarboxylic acid mother liquor (acrylic acid, 40% solid content, manufacturer Sichuan Jilong Chemical Building Materials Co., Ltd., production batch number 20121214-0) 250kg, sodium lignosulfonate 12kg, water 425kg and mix evenly , sequentially add 26kg of triisopropanolamine, 180kg of sodium nitrite, 50kg of calcium formate, 55kg of ethylene glycol, and 2.0kg of triterpene saponins and stir evenly to obtain final product. The dosage of the obtained composite water reducer is 1.1-1.7wt% of the cementitious material in the concrete.

Embodiment 3

[0058] Example 3 Preparation of composite water reducer of the present invention

[0059] Take VF-1 standard polycarboxylate mother liquor (40% solid content, manufacturer Sichuan Lujia Stone Technology Development Co., Ltd., production batch number 20121210-01) 245kg, sodium lignosulfonate 20kg, water 432kg, after mixing evenly, sequentially Add 23 kg of diethanolamine, 175 kg of calcium nitrate, 55 kg of calcium formate, and 50 kg of propylene glycol and stir evenly to obtain the product. The dosage of the obtained composite water reducer is 1.2-1.8wt% of the cementitious material in the concrete.

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Abstract

The invention relates to a high-early-strength antifreezing polycarboxylic-acid composite water reducing agent and application thereof, belonging to the field of construction materials. The invention aims to provide a high-early-strength antifreezing polycarboxylic-acid composite water reducing agent and application thereof. The high-early-strength antifreezing polycarboxylic-acid composite water reducing agent is prepared from the following raw materials in parts by weight: 17.5-32.5 parts of polycarboxylic-acid water reducing agent, 1-3 parts of sodium lignosulfonate, 7-36 parts of early-strength admixture, 2-8 parts of antifreezing agent, 0-0.5 part of air entraining agent and 20-72.5 parts of water. The early-strength admixture is composed of 1-8 parts by weight of organic early-strength component and 6-28 parts by weight of inorganic early-strength component. The high-early-strength antifreezing polycarboxylic-acid composite water reducing agent has the advantages of high early strength, favorable anti-freeze-thawing effect and the like.

Description

technical field [0001] The invention relates to an early-strength, antifreeze polycarboxylate composite water reducer and its application, belonging to the field of building materials. Background technique [0002] Polycarboxylate superplasticizer is the third-generation superplasticizer with excellent comprehensive performance. It has been produced and applied in Japan, Germany, the United States and other developed countries since the late 1980s. It has many advantages such as high water reducing rate, small loss of concrete slump over time, low dosage, great contribution to concrete strength, and good environmental protection. From high-speed railways to urban commercial concrete mixing stations, many domestic application companies have begun to choose polymer Carboxylic acid superplasticizer is an essential fifth component of concrete. [0003] On the one hand, due to the relatively short application and development time of polycarboxylic acid-based high-performance wat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/24C04B24/26C04B103/30
Inventor 李萍周转运蔡其全陈军超李薇宋明健张建兵
Owner CHINA 19TH METALLURGICAL CORP CHENGDU CONSTR
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