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Concrete anti-segregation water reducing agent and preparation method thereof

A water-reducing agent and anti-segregation technology, applied in the field of concrete water-reducing agent, can solve the problems of unsatisfactory early strength effect, easy bleeding and hardening of concrete, and achieve improved volume stability, initial fluidity and low fluidity , Enhance the effect of crack resistance

Inactive Publication Date: 2020-08-18
JIANGSU WANBANG BUILDING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The molasses retarder with a single component has a good retarding effect, but the early strength effect is not ideal
[0004] The invention provides a concrete anti-segregation water reducer, the main function is to enhance the stability of the multi-phase system of freshly mixed concrete, improve the workability of concrete, and is used to solve the problem of using polycarboxylate water reducer or sulfamate water reducer. Water-based concrete is prone to bleeding and hardening problems

Method used

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  • Concrete anti-segregation water reducing agent and preparation method thereof
  • Concrete anti-segregation water reducing agent and preparation method thereof
  • Concrete anti-segregation water reducing agent and preparation method thereof

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preparation example Construction

[0076] The second aspect of the present invention provides the preparation method of the concrete anti-segregation water reducer, including the following steps: adding water reducer, air-entraining agent, thickener, retarder, defoamer, and water into the reactor Middle; turn on the stirring tank, stir at a stirring speed of 20-40 rpm for 10-20 minutes, then continue stirring at a stirring speed of 40-60 rpm for 20-40 minutes, then transfer and store for later use.

[0077] In a preferred embodiment, the preparation method of the concrete anti-segregation water reducer includes the following steps: adding water reducer, air-entraining agent, thickener, retarder, defoamer, and water into the reactor Middle; turn on the stirring tank, stir for 20 minutes at a stirring speed of 30 rpm, and then continue to stir for 40 minutes at a stirring speed of 50 rpm, then transfer and store for future use.

Embodiment 1

[0082] Embodiment 1 provides a concrete anti-segregation water reducer, which at least includes the following components in parts by weight: 30 parts of water reducer, 16 parts of air-entraining agent, 2 parts of thickener, 1 part of retarder, disinfectant Foam agent 2 parts.

[0083] The water reducer is a mixture of naphthalenesulfonate formaldehyde condensate water reducer and sulfamate water reducer, with a weight ratio of 1:1; the naphthalenesulfonate formaldehyde condensate water reducer was purchased from Hubei Ai Gold Chemical Co., Ltd.; the sulfamate water reducer was purchased from Guizhou Huangteng Building Materials Co., Ltd.

[0084]The air-entraining agent is a mixture of lignosulfonate and nonylphenol polyoxyethylene ether, with a weight ratio of 1:1.2; the lignosulfonate is sodium lignosulfonate, purchased from Shandong Haoyao New Material Co., Ltd. Co., Ltd.; the nonylphenol polyoxyethylene ether was purchased from Jinan Century Tongda Chemical Co., Ltd.

[...

Embodiment 2

[0090] Example 2 provides a concrete anti-segregation water reducer, which at least includes the following components in parts by weight: 30 parts of water reducer, 16 parts of air-entraining agent, 2 parts of thickener, 1 part of retarder, disinfectant Foam agent 2 parts.

[0091] The water reducer is a mixture of naphthalenesulfonate formaldehyde condensate water reducer and sulfamate water reducer, with a weight ratio of 1:0.5; the naphthalenesulfonate formaldehyde condensate water reducer was purchased from Hubei Ai Gold Chemical Co., Ltd.; the sulfamate water reducer was purchased from Guizhou Huangteng Building Materials Co., Ltd.

[0092] The air-entraining agent is a mixture of lignosulfonate and nonylphenol polyoxyethylene ether, with a weight ratio of 1:0.5; the lignosulfonate is sodium lignosulfonate, purchased from Shandong Haoyao New Material Co., Ltd. Co., Ltd.; the nonylphenol polyoxyethylene ether was purchased from Jinan Century Tongda Chemical Co., Ltd.

[...

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Abstract

The invention relates to the technical field of concrete water reducing agents, in particular to a concrete anti-segregation water reducing agent and a preparation method thereof. The concrete anti-segregation water reducing agent at least comprises the following components in parts by weight: 20-40 parts of a water reducing agent; 5-20 parts of an air entraining agent; 1-5 parts of a thickening agent; 0.1-2 parts of a retarder; and 0.1-3 parts of a defoaming agent. The concrete anti-segregation water reducing agent of the invention provides the anti-segregation water reducing agent for concrete so as to enhance the stability of a fresh concrete multiphase system and improve the workability of concrete. With the concrete anti-segregation water reducing agent and the preparation method thereof of the invention adopted, the problem that concrete using a polycarboxylate superplasticizer or a sulfamate superplasticizer is easy to bleed and harden is solved, the defect that the strength ofthe concrete is greatly reduced by a common air entraining agent is avoided, and the problem that the water reducing rate of the superplasticizer is influenced by a common thickening agent can be avoided.

Description

technical field [0001] The invention relates to the technical field of concrete water reducers, in particular to a concrete anti-segregation water reducer and a preparation method thereof. Background technique [0002] In the current large-scale engineering construction, not only modern construction technology and construction methods are required, but also multi-functional performance requirements are put forward for concrete. For example, pumping concrete in high-rise buildings and transporting concrete over long distances requires the concrete to have a large flow state and retardation in order to maintain its good working performance; Temperature stress cracks require concrete to have low heat of hydration, slow heat release, and concrete retardation; and in different projects, according to different needs, concrete is required to have early strength or strength at various ages, etc. All of these concrete The improvement and improvement of technical performance are all ...

Claims

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Application Information

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IPC IPC(8): C04B24/42C04B103/30
CPCC04B40/0039C04B2103/302C04B24/226C04B24/16C04B24/18C04B24/38C04B24/06C04B24/42
Inventor 刘斌
Owner JIANGSU WANBANG BUILDING MATERIALS CO LTD
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