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Concrete waste slurry slag grinding aid and preparation method thereof

A grinding aid and concrete technology, applied in the field of concrete waste slurry disposal, can solve the problems such as grinding efficiency and effect not meeting application requirements, energy waste, etc., to improve activity and filling effect, reduce particle agglomeration, and improve material fluidity Effect

Active Publication Date: 2021-11-26
CHINA WEST CONSTR ACAD OF BUILDING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the grinding process, the grinding efficiency and effect often fail to meet the application requirements, resulting in energy waste

Method used

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  • Concrete waste slurry slag grinding aid and preparation method thereof
  • Concrete waste slurry slag grinding aid and preparation method thereof
  • Concrete waste slurry slag grinding aid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A preparation method of concrete waste slurry slag grinding aid, the specific steps are as follows:

[0043] (1) Weigh 55g of polyether polyol, 80g of diethanolamine, 10g of water and 1g of potassium bicarbonate in a reaction vessel with a condensing device, stir and mix evenly to obtain a clear liquid;

[0044] (2) Weigh 24g of butyl orthosilicate and quickly add it to the liquid in step 1), at room temperature, the rotation speed is 4000rpm, and continue to stir rapidly for 0.5h to obtain a uniform suspension;

[0045] (3) Immerse the reaction vessel containing the suspension obtained in step (2) in an oil bath at 70° C., adjust the rotation speed to 800 rpm, and stir for 24 hours to obtain a silica dispersion modified with hydroxyl and alcohol amino groups;

[0046] (4) Weigh 30g of phosphorus oxychloride, add it continuously to the silica dispersion in step (3) within 0.5h, control the reaction temperature at 90°C, and react for 3h to prepare the concrete waste slur...

Embodiment 2

[0048] A preparation method of concrete waste slurry slag grinding aid, the specific steps are as follows:

[0049](1) Weigh 70g of ethylene glycol, 100g of triethanolamine, 6g of water and 0.2g of potassium carbonate in a reaction vessel with a condensing device, stir and mix evenly to obtain a clear liquid;

[0050] (2) Weigh 13.8g of methyl orthosilicate and quickly add it to the liquid in step 1), at room temperature, the rotation speed is 1500rpm, and continue to stir rapidly for 1h to obtain a uniform suspension;

[0051] (3) Immerse the reaction vessel containing the suspension obtained in step (2) in an oil bath at 90° C., adjust the rotation speed to 400 rpm, and stir for 24 hours to obtain a silica dispersion modified with hydroxyl and alcohol amino groups;

[0052] (4) Weigh 10 g of phosphorus pentoxide, continuously add it to the silica dispersion in step 3) within 1 h, control the reaction temperature at 60° C., and react for 6 h to prepare the concrete waste slur...

Embodiment 3

[0054] A preparation method of concrete waste slurry slag grinding aid, the specific steps are as follows:

[0055] (1) Weigh 57.4g propylene glycol, 76.6g triethanolamine, 9g water and 0.6g histidine in a reaction vessel with a condensing device, stir and mix evenly to obtain a clear liquid;

[0056] (2) Weigh 21.1 g of propyl orthosilicate and quickly add it to the liquid in step 1), at room temperature, with a rotation speed of 2500 rpm, and continue to stir rapidly for 1 hour to obtain a uniform suspension;

[0057] (3) Immerse the reaction vessel containing the suspension obtained in step (2) in an oil bath at 80° C., adjust the rotation speed to 600 rpm, and stir for 24 hours to obtain a silica dispersion modified with hydroxyl and alcohol amino groups;

[0058] (4) Weigh 26.8g of pyrophosphoric acid, continuously add it to the silica dispersion in step 3) within 0.5h, control the reaction temperature at 80°C, and react for 5h to prepare the concrete waste slurry slag gr...

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Abstract

The invention discloses a concrete waste slurry slag grinding aid and a preparation method thereof, and belongs to the technical field of concrete waste slurry disposal. The concrete waste slurry slag grinding aid comprises the following raw materials by mass: 5-12% of silicate ester, 20-40% of polyol, 30-50% of alcohol amine, 3-6% of water, 5-15% of a phosphorylation reagent and 0.1-0.5% of a catalyst. Silicate ester, polyol, alcohol amine, water and a phosphorylation reagent are used as main raw materials, and under the action of a catalyst, the concrete waste slurry slag grinding aid is prepared through a hydrolysis reaction of the silicate ester, modification of hydroxyl and alcohol amine and an esterification reaction of a phosphate group. The grinding efficiency and effect of the concrete waste slurry residues in the grinding process can be effectively improved, so that the particle agglomeration is reduced, the material fluidity is improved, the activity and filling effect of the concrete waste slurry residues are improved, and the porosity of the concrete waste slurry residues is reduced.

Description

technical field [0001] The invention relates to the technical field of concrete waste slurry disposal, in particular to a concrete waste slurry slag grinding aid and a preparation method thereof. Background technique [0002] Concrete waste slurry is a liquid slurry obtained by separating sand, gravel, and coarse sand from waste water and waste residue generated after cleaning of concrete production, transportation, and construction-related equipment. The waste slurry is composed of solid slag (solid particles) and clarified liquid. The solid slag is mainly partially unhydrated cementitious materials, hydration products, and a small amount of solid particles such as stone powder and mud; the waste slurry clarified liquid is the waste slurry that has been allowed to stand for a period The supernatant liquid has an alkaline pH value and cannot be discharged directly due to ecological and environmental protection requirements. At present, concrete waste slurry is generally dis...

Claims

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Application Information

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IPC IPC(8): C04B24/42C04B7/24C04B7/38B02C23/06C04B103/52
CPCC04B24/425C04B7/246C04B7/38B02C23/06C04B2103/52Y02P40/10Y02W30/91
Inventor 高育欣曾超刘明闫松龄吴雄张磊叶子马建峰杨文
Owner CHINA WEST CONSTR ACAD OF BUILDING MATERIALS CO LTD
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