Preparation method of mineral admixture slurry for high-performance prefabricated component

A prefabricated component, high-performance technology, applied in the field of building materials, can solve the problems of large fluctuations in carbon content, fineness and chemical composition, unstable quality of wet-drained fly ash, low utilization rate of wet-drained ash, etc., to achieve Significant social and economic benefits, reduced energy consumption, and improved strength

Active Publication Date: 2017-05-31
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the fly ash is flushed to the ash storage yard with water, resulting in a large water content in the fly ash, which is difficult to use directly
The utilization rate of wet blowing ash is low, mainly because the quality of wet blowing fly ash is unstable, and its carbon content, fineness and chemical composition fluctuate greatly, and it is difficult to control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Take the wet-discharged fly ash with a mass moisture content of 25-35%, and set aside after aging for 48 hours;

[0030] The mass quality of the wet-discharged fly ash is: free calcium oxide content≤2.5%, sulfur trioxide content≤3%, carbon content≤12%; Blaine specific surface area is 350-400m 2 / Kg;

[0031] 2) Take Na by mass percentage 2 CO 3 40% and 60% of high-efficiency naphthalene-based water reducer are mixed to prepare modifiers;

[0032] 3) Mineral blending slurry, according to the mass fraction of each component, the solid content of the wet fly ash obtained in step 1) is 65, the solid content of quartz sand tailings is 34, the modifier obtained in step 2) is 1.0, and the water is 80 Mixing and wet grinding until the specific surface area is above 1500㎡ / kg, and the average particle diameter is less than 1μm to obtain mineral blended slurry;

[0033] The quartz sand tailings are waste residues in quartz ore mining, tailings and tailings in the processing...

Embodiment 2

[0036] Embodiment 2, with embodiment 1, difference is,

[0037] 2) Take 30% of triethanolamine and 70% of polycarboxylate water reducer to prepare modifier according to mass percentage;

[0038] 3) Mineral blending slurry, according to the mass fraction of each component, take step 1) obtained wet discharge fly ash solid content 70, quartz sand tailings solid content 28, step 2) obtained modifier 2.0, water 80 mix.

[0039] Produce the AB type prestressed high-strength concrete pipe pile mechanical performance detection result of outer diameter 400mm wall thickness 90mm with the mineral admixture slurry prepared in this embodiment as follows: detect cracking bending moment 82KN m, detection limit bending moment 138KN m, standard The cracking bending moment is 63KN·m, and the standard ultimate bending moment is 104KN·m.

Embodiment 3

[0040] Embodiment 3, with embodiment 1, the difference is,

[0041] 2) Take 33.3% of triethanolamine and 66.7% of polycarboxylate water reducer to prepare modifier according to mass percentage;

[0042]3) Mineral blending slurry, according to the mass fraction of each component, the solid content of the wet fly ash obtained in step 1) is 70, the solid content of quartz sand tailings is 27, the modifier obtained in step 2) is 3.0, and the water is 90 mix.

[0043] The mineral admixture slurry prepared by the present embodiment is used to produce the AB type prestressed high-strength concrete pipe pile with an outer diameter of 400 mm and a wall thickness of 90 mm. The mechanical performance test results are as follows: detection cracking bending moment 87KN m, detection limit bending moment 137KN m, standard The cracking bending moment is 63KN·m, and the standard ultimate bending moment is 104KN·m.

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Abstract

The invention relates to a preparation method of mineral admixture slurry for a high-performance prefabricated component. The preparation method comprises the following steps: taking wet-discharged fly ash with the mass water content of 25 to 35 percent, ageing for 48 hours and mixing 30 to 40 percent of a reinforcing agent with 60 to 70 percent of a surfactant to obtain a modifier; mixing the wet-discharged fly ash with the solid content of 65 to 75 percent, quartz tailing sand with the solid content of 22 to 34 percent, 1 to 3 percent of the modifier, and 80 to 100 percent of water, carrying out wet grinding until the specific surface area is 1500m<2> / kg or above and the average diameters of particles are smaller than 1[mu]m, and obtaining the mineral admixture slurry with a daily active index of 130. According to the preparation method disclosed by the invention, the fly ash and the quartz tailing sand are utilized as raw materials so as to benefit environmental protection; when the high-performance prefabricated component is produced, the cement content can be reduced; when the prefabricated component is subjected to high pressure steam curing, the wet-discharged fly ash is thermally excited to generate crystals such as hydration products, hydrated calcium silicate and ettringite; the crystals can replace part of cementing materials; after the quartz tailing sand is thermally excited, the activity is enhanced, and the strength of the prefabricated component is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a preparation method of mineral mixed slurry of high-performance prefabricated components. Background technique [0002] Quartz ore tailings include waste residue from quartz ore mining, tailings and tailings during processing, of which tailings account for the vast majority, the main component of tailings is silica, and impurities are mainly feldspar, clay, mica, Iron minerals, etc.; quartz sand tailings belong to mining solid waste, which has the characteristics of large quantity, many types and complex properties. At present, most of the quartz sand tailings have not been utilized except for a small amount of raw materials for making sodium silicate and ceramics. As a kind of industrial solid waste, the long-term storage of these quartz sand tailings not only invades the land, but also causes serious pollution to the environment. Therefore, the resource...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/20C04B24/24
CPCC04B40/0039C04B18/08C04B22/10C04B24/20C04B14/06C04B24/122C04B24/24
Inventor 贺行洋兰蒙孙艺恒代飞叶青郑正旗王庭苇刘雨轩卢敏王迎斌苏骏
Owner HUBEI UNIV OF TECH
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