Concrete efficient expending agent employing aluminum-containing industrial waste residues as well as preparation method and application of concrete efficient expending agent

A high-efficiency expansion agent and industrial waste residue technology, applied in the field of concrete high-efficiency expansion agent, can solve the problems of less dissolution, poor excitation effect, low expansion efficiency, etc., achieve large expansion efficiency, compensate for early and mid-late shrinkage, and greatly limit expansion rate effect

Active Publication Date: 2015-07-08
JIANGSU SOBUTE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Based on the consideration of using industrial waste as much as possible, in the process of using the current expansion agent, the excitation effect is generally poor, and the active Al 2 o 3 In order to solve

Method used

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  • Concrete efficient expending agent employing aluminum-containing industrial waste residues as well as preparation method and application of concrete efficient expending agent
  • Concrete efficient expending agent employing aluminum-containing industrial waste residues as well as preparation method and application of concrete efficient expending agent
  • Concrete efficient expending agent employing aluminum-containing industrial waste residues as well as preparation method and application of concrete efficient expending agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Get calcium oxide expanded clinker 10, dihydrate gypsum 20, primary fly ash 50, lithium slag 19.5, triethanolamine 0.5 by weight ratio, and the above components are figure 1 Process flow After mixing and grinding, homogenization is used to obtain a high-efficiency concrete expansion agent HME-1 of the present invention using aluminum-containing industrial waste residues.

[0039] Adopt the benchmark cement specified in GB8076, mix 10% of the expansion agent prepared by the present invention in the cement, and test according to the provisions of GB23439-2009 "Concrete Expansion Agent", its physical properties are shown in Table 1.

[0040] Table 1

[0041]

Embodiment 2

[0043] Get calcium oxide expanded clinker 15, phosphogypsum 18, first-grade fly ash 51.2, lithium slag 15, triethanolamine 0.8 by weight and number ratio, and above-mentioned components are pressed figure 1 Process flow After mixing and grinding, homogenization is used to obtain a high-efficiency concrete expansion agent HME-2 of the present invention using aluminum-containing industrial waste slag.

[0044] Using the standard cement stipulated in GB8076, 10% of the expansion agent prepared by the present invention is mixed into the cement, and tested according to the provisions of GB23439-2009 "Concrete Expansion Agent", and its physical properties are shown in Table 2.

[0045] Table 2

[0046]

Embodiment 3

[0048] Get calcium oxide expanded clinker 19, dihydrate gypsum 20, secondary fly ash 40, lithium slag 20, triethanolamine 1.0 by weight and number ratio, and the above-mentioned components are pressed figure 1 Process flow After mixing and grinding, homogenization is used to obtain a high-efficiency concrete expansion agent HME-3 of the present invention using aluminum-containing industrial waste residues.

[0049] Using the standard cement stipulated in GB8076, 10% of the expansion agent prepared by the present invention is mixed into the cement, and tested according to the provisions of GB23439-2009 "Concrete Expansion Agent", and its physical properties are shown in Table 3.

[0050] table 3

[0051]

[0052]

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Abstract

The invention provides a concrete efficient expending agent employing aluminum-containing industrial waste residues as well as a preparation method and an application of the concrete efficient expending agent. According to the concrete efficient expending agent employing the aluminum-containing industrial waste residues, the solubility of active Al2O3 in the aluminum-containing industrial waste residues is increased by employing multiple excitation effects of calcium oxide, gypsum, lithium slag and triethanolamine; and the obtained expending agent can generate two expending sources, namely calcium hydroxide and ettringite through hydration reaction. The expending agent has the characteristics of calcium oxide expending agents and calcium sulphoaluminate expending agents, and has relatively large restrained expansion rate, relatively high compression resistance and breaking strength.

Description

technical field [0001] The invention relates to a high-efficiency concrete expansion agent utilizing aluminum-containing industrial waste residue, a preparation method and application thereof. Background technique [0002] Due to its own hydration reaction and the process of dehydration to the surrounding environment, cement concrete has self-shrinkage, drying shrinkage, and temperature-drop shrinkage. Shrinkage under constraints often leads to concrete cracking and deterioration, causing engineering quality accidents. How to take effective measures to reduce or even eliminate various shrinkages and avoid cracking at the source has always been a problem that engineers have been working hard to explore. Engineering practice has proved that the expansion agent is used to prepare shrinkage-compensating concrete, and the expansion of the expansion agent is used to offset or reduce the shrinkage of cement concrete. The expansion agent is an ideal material to improve the volume st...

Claims

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Application Information

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IPC IPC(8): C04B24/12
Inventor 张守治田倩王育江姚婷陆安群
Owner JIANGSU SOBUTE NEW MATERIALS
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