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A kind of modified granite stone powder admixture and preparation method thereof

A technology for granite rock powder and admixture, which is applied in the field of solid waste treatment and resource utilization, can solve the problems of adverse effects on the strength of cement-based materials and low activity of granite rock powder, and achieves improved working performance and strength, high economic value, good performance

Active Publication Date: 2019-01-18
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low activity of granite stone powder, it can adversely affect the strength of cement-based materials when incorporated alone

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Prepare the inorganic modifier, the oxide raw material used and the mass ratio are: Al 2 o 3 25%, Fe 2 o 3 10%, CaO18%, MgO3%, SiO 2 42%, SO 3 (K 2 SO 4 ) 2%; the above-mentioned oxide raw materials were mixed uniformly and heated in a microwave field with a frequency of 2450MHz for 5 hours, and then subjected to segmental calcination at 1000°C for 2h, 1260°C for 2h, and 1450°C for 3h, then cooled in air and Grind in a ball mill until the specific surface area > 400m 2 / kg to obtain the inorganic modifier.

[0020] Preparation of modified granite stone powder admixture: 80 parts by mass of granite stone powder (SiO 2 The content is 75%, the sub-blue value is 0.4) and 20 parts of inorganic modifier and grinding aid (the mixture of triethanolamine and ethylene glycol in a mass ratio of 2:1) are mixed evenly, and the mass of grinding aid accounts for 1% of granite stone powder. and 0.2% of the sum of the mass of the inorganic modifier, and then placed in a ball...

Embodiment 2

[0023] Prepare the inorganic modifier, the oxide raw material used and the mass ratio are: Al 2 o 3 30%, Fe 2 o 3 9%, CaO 11%, MgO 1.5%, SiO 2 47.5%, SO 3 (Na 2 SO 4 ) 1%; the above-mentioned oxide raw materials were mixed uniformly and heated in a microwave field with a frequency of 2300MHz for 5 hours, and then subjected to segmental calcination at 1000°C for 2h, 1260°C for 2h, and 1450°C for 3h, then cooled in air and Grind in a ball mill until the specific surface area > 400m 2 / kg to obtain the inorganic modifier.

[0024] Preparation of modified granite stone powder admixture: 80 parts by mass of granite stone powder (SiO 2 The content is 80%, the sub-blue value is 0.4) and 20 parts of inorganic modifier and grinding aid (the mixture of triethanolamine and ethylene glycol in a mass ratio of 2:1) are mixed evenly, and the mass of grinding aid accounts for 1% of granite stone powder. and 0.3% of the sum of the mass of the inorganic modifier, and then placed in ...

Embodiment 3

[0027] Prepare the inorganic modifier, the oxide raw material used and the mass ratio are: Al 2 o 3 35%, Fe 2 o 3 15%, CaO12.5%, MgO4.5%, SiO 2 30%, SO 3 (Na 2 SO 4 ) 3%; the above-mentioned oxide raw materials were mixed uniformly and heated in a microwave field with a frequency of 2350MHz for 5 hours, and then subjected to segmental calcination at 1000°C for 2h, 1260°C for 2h, and 1450°C for 3h, then cooled in air and Grind in a ball mill until the specific surface area > 400m 2 / kg to obtain the inorganic modifier.

[0028] Preparation of modified granite stone powder admixture: 80 parts by mass of granite stone powder (SiO 2 The content is 83%, the sub-blue value is 0.4) and 20 parts of inorganic modifier and grinding aid (the mixture of triethanolamine and ethylene glycol in a mass ratio of 2:1) are mixed evenly, and the mass of grinding aid accounts for 1% of granite stone powder. and 0.3% of the sum of the mass of the inorganic modifier, and then placed in a...

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Abstract

The invention relates to a modified granite linestone powder additive and a preparation method thereof. The modified granite linestone powder additive is prepared from the following raw materials in percentage by weight: granite linestone powder, an inorganic modifying agent and a grinding aid, wherein the granite linestone powder and the inorganic modifying agent are in a mass ratio of 80 to 85 parts of the granite linestone powder and 15 to 20 parts of the inorganic modifying agent, wherein the total mass of the granite linestone powder and the inorganic modifying agent is 100 parts; the mass of the grinding aid is 0.1 to 0.3 percent of the total mass of the granite linestone powder and the inorganic modifying agent. According to the modified granite linestone powder additive and the preparation method thereof, the additive prepared by using the modified granite linestone powder replaces part of cement, so that the granite linestone powder which is produced during a machine-made sand production process can be effectively utilized, the waste of the granite linestone powder is reduced, and the problem of the shortage of a mineral additive in the existing concrete industry can also be solved partially; moreover, obtained concrete is high in performance, and has a high economic value.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment and resource utilization, and relates to a modified granite rock powder admixture and a preparation method thereof. Background technique [0002] In recent years, with the advancement of national infrastructure construction, the demand for concrete in the market has increased sharply. The supply of commonly used concrete admixtures such as fly ash and mineral powder has become increasingly tight, and the output has become increasingly difficult to meet the demand for concrete. Granite resources are widely distributed in my country. During the processing of various granite stones and the production of machine-made sand, a large amount of granite powder will be produced. Most of these granite powders are stacked randomly and have not been well utilized. If granite stone powder can be used as an admixture in concrete, it will not only reduce the accumulation of waste, but also solve the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/12
CPCC04B40/0039C04B14/048C04B2103/0068C04B24/122C04B24/02
Inventor 李相国徐朋辉刘卓霖杨蓉笪俊伟蒋文广任钊锋
Owner WUHAN UNIV OF TECH
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