Viscosity-reducing enhanced anti-cracking agent and preparation method thereof

An enhanced, anti-cracking agent technology, applied in the field of concrete admixtures for building materials, can solve the problems of reducing the viscosity of concrete, increasing the cost of concrete production, and the fact that the viscosity reducer does not have the ability to compensate for concrete shrinkage, etc.

Active Publication Date: 2021-09-14
武汉三源特种建材有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the viscosity reducer of this invention does not have the function of compensating for concrete shrinkage, and relevant anti-cracking measures are not taken for the risk of concrete cracking, and the addition of water reducing agent in this invention reduces the viscosity of concrete, which increases the production cost of concrete

Method used

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  • Viscosity-reducing enhanced anti-cracking agent and preparation method thereof
  • Viscosity-reducing enhanced anti-cracking agent and preparation method thereof
  • Viscosity-reducing enhanced anti-cracking agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The viscosity-reducing enhanced anti-crack agent provided in this example is made of the following raw materials in mass percentage: 40% of modified magnesium oxide expansion agent, 10% of polypropylene fiber, 20% of viscosity-reducing component, and 30% of reinforcing component; The viscosity-reducing component includes the following components in mass percentage: 45% of microbead powder, 2% of cellulose ether, 5% of powder water reducer, and 48% of sepiolite; the reinforcing component includes the following mass percentage Each component of: superfine mineral admixture 60%, silica fume 20%, nano silicon dioxide 10%, sodium gluconate 2%, urea 8%; The ultrafine mineral admixture is superfine fly ash and superfine mineral powder, the mass ratio of the two is 60:40; the fineness is 750m 2 / kg.

[0030] The preparation method of the modified magnesium oxide expansion agent is as follows: the magnesium oxide expansion clinker is mixed with polymethylsiloxane, ground and dr...

Embodiment 2

[0038] This example is basically the same as Example 1, except that the viscosity-reducing enhanced anti-cracking agent is made of the following raw materials in mass percentage: 30% of modified magnesium oxide expansion agent, 15% of polypropylene fiber, and 20% component, 35% reinforcing component.

Embodiment 3

[0040] This example is basically the same as Example 1, except that the viscosity-reducing enhanced anti-cracking agent is made of the following raw materials in mass percentage: 50% of modified magnesium oxide expansion agent, 5% of polypropylene fiber, and 20% component, 25% reinforcing component.

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Abstract

The invention discloses a viscosity-reducing enhanced anti-cracking agent and a preparation method thereof. The viscosity-reducing enhanced anti-cracking agent is prepared from the following raw materials in percentage by mass: 30-60% of a modified magnesium oxide expanding agent, 5-20% of synthetic fiber, 10-40% of a viscosity-reducing component and 20-50% of an enhancing component, wherein the viscosity-reducing component comprises microbead powder, cellulose ether, a powder water reducing agent and sepiolite, and the enhancing component comprises a superfine mineral admixture, silica fume, nano silicon dioxide, sodium gluconate and urea. According to the invention, a viscosity-reducing component and an enhancing component are compounded on the basis of shrinkage compensation of an expanding agent and early crack resistance of fibers, the components have a synergistic effect under a proper ratio so as to effectively reduce the viscosity of concrete and improve the strength of the concrete, and the viscosity-reducing component and the enhancing component have a promoting effect on the expanding agent so as to synergistically improve the expansion effect of the expanding agent.

Description

technical field [0001] The invention belongs to the field of concrete admixtures for building materials, and in particular relates to a viscosity-reducing enhanced anti-cracking agent and a preparation method thereof. Background technique [0002] In recent years, with the continuous popularization, application and development of commercial concrete, people have put forward higher requirements for concrete. For modern concrete, often a single performance can no longer meet the current construction needs. Crack resistance, high strength and durability As well as good construction performance, etc., these are the new demands of the modern construction market for commodities. In order to improve and enhance the performance of concrete, multi-functional admixtures have also been developed rapidly. [0003] At present, the most economical and effective way to solve the problem of concrete cracks is to add concrete expansion agents in the concrete production process. Concrete expa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38
CPCC04B40/0039C04B22/066C04B16/0633C04B24/383C04B2103/302C04B22/08C04B22/0006C04B22/06C04B24/10C04B24/126
Inventor 纪宪坤向飞王海龙苑立东
Owner 武汉三源特种建材有限责任公司
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