Preparation method of quick setting and rapid hardening gangue alkali-activated rapid repairing material

A technology for repairing materials and coal gangue, which is applied in the field of preparation of fast-setting and fast-setting hard coal gangue alkali-induced fast-repairing materials, can solve the problems of insufficient early strength, shortened setting time, slow setting, etc., and achieves acceleration of setting time and elimination of environmental pollution. Problem, effect of high cohesion

Inactive Publication Date: 2019-06-28
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Technical problem: The purpose of the present invention is to overcome the shortcomings of slow coagulation and insufficient early strength of the coal gangue alkali excitation material, and to increase the content of active calcium in the polymerization reaction environment by adding an appropriate amount of slaked lime powder when preparing the coal gangue alkali excitation material , so as to promote the polymerization reaction and the formation of polymerization products, achieve the purpose of significantly shortening the setting time and greatly improving the early strength, and finally realize the application of coal gangue alkali-activated materials as fast repair materials in engineering

Method used

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  • Preparation method of quick setting and rapid hardening gangue alkali-activated rapid repairing material
  • Preparation method of quick setting and rapid hardening gangue alkali-activated rapid repairing material
  • Preparation method of quick setting and rapid hardening gangue alkali-activated rapid repairing material

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Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1: A kind of fast-setting fast-hardening coal gangue alkali-activated rapid repair material, raw material composition and mass percentage thereof are as follows: the cementitious material is ground coal gangue micropowder 55% (dosage 181.5kg / m 3 ); blast furnace granulated slag powder 40% (dosage 132kg / m 3 ); ground slaked lime powder 5% (dosage 16.5kg / m 3 ); the fine aggregate is medium-coarse sand (dosage 651kg / m 3 ); the activator is liquid sodium silicate with a modulus of 2.75 (dosage 88kg / m 3 ); caustic soda (NaOH dosage 17.6kg / m 3 ); water (amount 92.4kg / m 3 );

[0026] Table 1 Test mix ratio kg / m 3

[0027]

[0028] Using the above-mentioned fast-setting and fast-hardening coal gangue alkali-activated fast repairing material: its preparation process includes weighing ingredients and mixing process, preparation process and pouring process, and the specific methods are as follows:

[0029](1) Weighing batching and mixing process: first, accord...

Embodiment 2

[0032] Embodiment 2: preparation method is identical with embodiment 1, omission. The difference is that: a fast-setting fast-hardening coal gangue alkali-activated rapid repair material, the raw material composition and its mass percentage are as follows: the cementitious material is 45% of finely ground coal gangue powder (amount of 148.5kg / m 3 ); blast furnace granulated slag powder 40% (dosage 132kg / m 3 ); ground slaked lime powder 15% (dosage 49.5kg / m 3 ); the fine aggregate is medium-coarse sand (dosage 651kg / m 3 ); the activator is liquid sodium silicate with a modulus of 2.75 (dosage 88kg / m 3 ); caustic soda (NaOH dosage 17.6kg / m 3 ); water (amount 92.4kg / m 3 );

[0033] Table 2 Test mix ratio kg / m 3

[0034]

Embodiment 3

[0035] Embodiment 3: preparation method is identical with embodiment 1, omission. The difference is: a fast-setting and fast-hardening coal gangue alkali-activated rapid repair material, the raw material composition and its mass percentage are as follows: the cementitious material is 30% of finely ground coal gangue powder (amount of 181.5kg / m 3 ); blast furnace granulated slag powder 40% (dosage 132kg / m 3 ); ground slaked lime powder 30% (dosage 16.5kg / m 3 ); the fine aggregate is medium-coarse sand (dosage 651kg / m 3 ); the activator is liquid sodium silicate with a modulus of 2.75 (dosage 88kg / m 3 ); caustic soda (NaOH dosage 17.6kg / m 3 ); water (amount 92.4kg / m 3 );

[0036] Table 3 Test mix ratio kg / m 3

[0037]

[0038] The setting time and compressive strength of coal gangue alkali-activated quick repair materials were measured as follows: Table 4 shows.

[0039] Table 4 Coagulation time and compressive strength of coal gangue alkali-activated rapid repair ma...

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Abstract

The invention relates to a preparation method of a quick setting and rapid hardening gangue alkali-activated rapid repairing material. The content of active calcium is increased by doping an appropriate amount of hydrated lime powder, the process of a polymerization reaction and formation of polymer products are promoted, the setting time of the coal gangue alkali-activated material is obviously shortened, the early strength is greatly improved, and finally application of the coal gangue alkali-activated material in serving as a rapid repairing material in engineering. The coal gangue alkali-activated rapid repairing material can adjust the setting time by itself, the excellent cohesiveness, early strength and high strength characteristics are achieved, and the material is very suitable for serving as the rapid repairing material for use. The coal gangue alkali-activated rapid repairing material can replace a cement repairing material for use, not only can the environmental pollution problem caused by large accumulation of waste coal gaugue can be eliminated, but also excessive dependence on cement can be relieved, and excessive consumption of non-renewable resources is reduced, and the method has great significance to countries such as China serious in energy shortage and environmental pollution.

Description

technical field [0001] A preparation method of fast-setting and fast-hardening coal gangue alkali-activated rapid repair material Background technique [0002] Coal gangue alkali-activated material is a new type of inorganic non-metallic material newly developed in recent years. This kind of material uses industrial solid waste-coal gangue as the main raw material, and is fully mixed with other mineral admixtures and an appropriate amount of alkali silicate solution. , cured and molded under normal temperature or autoclaved conditions, is a type of gelling material bonded by aluminosilicate gelling components. Compared with traditional Portland cement, coal gangue alkali-activated materials have high strength (compressive strength up to 15-74MPa), high temperature resistance (refractoriness > 1000°C), corrosion resistance to acid, alkali and salt in terms of performance and function. Low permeability and other advantages; In the production process, high-temperature calci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00
Inventor 黄国栋
Owner ANHUI UNIV OF SCI & TECH
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