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Efficient concrete expansion anti-crack waterproof agent and preparation method thereof

An anti-cracking waterproofing agent and concrete technology, which is applied in the field of building materials, can solve the problems of easy cracking and poor impermeability of concrete, and achieve the effects of improving cracking and leakage, improving waterproof performance, and compensating for full-cycle shrinkage performance

Active Publication Date: 2021-07-27
GUANGDONG YUESHENG SPECIAL BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a kind of high-efficiency concrete expansion anti-cracking waterproofing agent and its preparation method, which is used to solve the problem of easy cracking and impermeability of concrete in the prior art. bad question

Method used

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  • Efficient concrete expansion anti-crack waterproof agent and preparation method thereof
  • Efficient concrete expansion anti-crack waterproof agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] In the present embodiment, the preparation steps of modified magnesium oxide are: place M type magnesium oxide expansion agent (activation time 168s) in dehydrated alcohol and stir for 10 minutes, then add natural sodium-based bentonite and ammonium sulfate successively and continue to stir for 60 minutes, static After standing for 30 minutes, the lower layer of sediment was obtained; the lower layer of sediment was transferred to an aluminum crucible, placed in a muffle furnace, heated to 500°C at a rate of 2°C / min, kept for 2 hours, and then naturally cooled to room temperature to obtain a modified solid material; grind the modified solid to a specific surface area of ​​280-400m 2 / kg to obtain modified magnesium oxide.

[0032] In this example, the preparation steps of the ultra-fine iron tailings powder are as follows: after drying the iron tailings slag at 105°C, grind it with a ball mill until the specific surface area is 600-700m 2 / kg to obtain ultra-fine iron ...

Embodiment 2

[0035] In this example, the same steps as in Example 1 were used to prepare modified magnesia and ultrafine iron tailings powder. After the preparation of modified magnesia and ultrafine iron tailings powder was completed, the modified 30 parts of magnesium oxide, 10 parts of ultrafine iron tailings powder, 5 parts of fluorogypsum, 4 parts of quicklime, 1 part of magnesium stearate, 4 parts of calcium carbonate nano whiskers, 5 parts of aluminum sulfate, 10 parts of aluminum slag powder, 1 part of carboxylic acid superplasticizer, 0.4 part of sodium citrate, and mechanically mix the above components to obtain a finished product of high-efficiency concrete expansion anti-cracking waterproofing agent.

Embodiment 3

[0037] In this example, the same steps as in Example 1 were used to prepare modified magnesia and ultrafine iron tailings powder. After the preparation of modified magnesia and ultrafine iron tailings powder was completed, the modified 50 parts of magnesium oxide, 20 parts of ultrafine iron tailings powder, 10 parts of fluorogypsum, 6 parts of quicklime, 3 parts of magnesium stearate, 6 parts of calcium carbonate nano whiskers, 7.5 parts of aluminum sulfate, 15 parts of aluminum slag powder, 2 parts of carboxylic acid superplasticizer, 0.6 part of sodium citrate, and mechanically mix the above components to obtain a finished product of high-efficiency concrete expansion anti-cracking waterproofing agent.

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Abstract

The invention discloses an efficient concrete expansion anti-crack waterproof agent and a preparation method of the efficient concrete expansion anti-crack waterproof agent. The efficient concrete expansion anti-cracking waterproof agent is prepared from the following raw material components: 30-70 parts of modified magnesium oxide, 10-30 parts of superfine iron tailing powder, 5-15 parts of fluorgypsum, 4-8 parts of quick lime, 1-5 parts of magnesium stearate, 4-8 parts of calcium carbonate nanowhiskers, 5-10 parts of aluminum sulfate, 10-20 parts of aluminum slag powder, 1-3 parts of a polycarboxylate superplasticizer and 0.4-0.8 part of sodium citrate. According to the invention, components such as modified magnesium oxide, superfine iron tailing powder and calcium carbonate nanowhiskers are introduced and compounded to form the waterproof agent, so that not only can the whole-period shrinkage performance of concrete be compensated, but also the compactness of the concrete can be enhanced, the waterproof performance can be improved, and the problems of cracking and leakage of the concrete can be comprehensively improved; meanwhile, industrial solid wastes such as fluorgypsum, iron tailings, aluminum slag and the like can be fully utilized, so that cyclic utilization of resources is realized, and the product has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a high-efficiency concrete expansion anti-crack waterproofing agent and a preparation method thereof. Background technique [0002] Concrete is the main material of contemporary buildings. It has the advantages of convenient construction, cheap and easy to obtain, excellent mechanical properties and good durability. However, as a non-homogeneous material, it is easy to produce more harmful pores and cause leakage occur. At the same time, as the main gelling component of concrete, cement has the disadvantages of large hydration heat release, concentrated heat release, and unstable volume of hydration products. Based on the above reasons, the impact of the environment will lead to drying shrinkage of concrete materials. , self-shrinkage, temperature shrinkage and other phenomena and bring corresponding stress, in the presence of restrictive conditions, it will cause cra...

Claims

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Application Information

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IPC IPC(8): C04B24/08C04B103/65
CPCC04B40/0039C04B2103/65C04B22/066C04B22/0006C04B22/146C04B22/064C04B24/085C04B14/383C04B22/148C04B2103/302C04B24/06Y02W30/91
Inventor 黄松松刘洋
Owner GUANGDONG YUESHENG SPECIAL BUILDING MATERIALS