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Preparation method of concrete accelerator

A technology of quick-setting agent and concrete, which is applied in the field of concrete additives, can solve the problems of affecting the later strength of concrete and the difficulty of dispersing the quick-setting agent, and achieves the effects of improving coagulation, increasing temperature and increasing hydroxyl functional molecules.

Inactive Publication Date: 2021-03-19
成都楠裘榕科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a preparation method of concrete quick-setting agent in view of the difficulty in dispersing the current concrete quick-setting agent and easily affecting the strength of concrete in the later stage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] A kind of preparation method of concrete quick-setting agent, this preparation method comprises the steps:

[0034] (1) Take waste water to filter, decolorize, collect the decolorized liquid, mix the decolorized liquid and waste residue at a mass ratio of 16:6~9, stir for 3 hours, let stand for 2 hours, filter, collect the filtrate, and mix the filtrate and added particles at a mass ratio of 10 : 2~4 mix evenly, increase the pressure to 1.2~1.4MPa, heat to 120~130℃, heat for 5~7h;

[0035] (2) After heating, add mixed particles with 60-80% of the added particle mass, cool down to 80°C, stir for 6 hours, cool to 15-20°C, let stand for 3 hours, and collect the mixture;

[0036] (3) In parts by weight, 125-130 parts of mixture, 45-50 parts of water, 22-26 parts of ethanolamine, 18-22 parts of monomer, 16-27 parts of ethylene oxide, 9-13 parts of organic acid , 5-8 parts of initiator, 3-9 parts of protective agent, 1-2 parts of catalyst;

[0037] (4) First put water, etha...

Embodiment 1

[0039] The waste water is mixed with citric pickling waste water and sulfuric acid pickling waste water according to any volume ratio.

[0040] The waste slag is made by mixing aluminum ash and blast furnace slag at a mass ratio of 8:3.

[0041] The added particles are mixed with albite and cryolite at a mass ratio of 5:7, ball milled, and the ball milled product is collected to obtain the added particles.

[0042] The mixed particles are formed by mixing magnesium oxide and copper oxide at a mass ratio of 13:3.

[0043] The monomer is a mixture of acrylamide and maleic anhydride in a mass ratio of 13:2.

[0044] The organic acid is malic acid.

[0045] The initiator is sodium persulfate.

[0046] The protective agent is acetic anhydride.

[0047] The catalyst is nano titanium dioxide.

[0048] A kind of preparation method of concrete quick-setting agent, this preparation method comprises the steps:

[0049] (1) Take waste water to filter, decolorize, collect the decolor...

Embodiment 2

[0054] The waste water is mixed with citric pickling waste water and sulfuric acid pickling waste water according to any volume ratio.

[0055] The waste slag is made by mixing aluminum ash and blast furnace slag at a mass ratio of 8:2.

[0056]The added particles are albite and cryolite mixed at a mass ratio of 5:5, ball milled, and the ball milled product is collected to obtain the added particles.

[0057] The mixed particles are formed by mixing magnesium oxide and copper oxide at a mass ratio of 13:2.

[0058] The monomer is a mixture of acrylamide and maleic anhydride in a mass ratio of 13:2.

[0059] The organic acid is fumaric acid.

[0060] The initiator is sodium persulfate.

[0061] The protective agent is acetic anhydride.

[0062] The catalyst is nano titanium dioxide.

[0063] A kind of preparation method of concrete quick-setting agent, this preparation method comprises the steps:

[0064] (1) Take waste water to filter, decolorize, collect decolorized liq...

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Abstract

The invention belongs to the technical field of concrete additives, and particularly relates to a preparation method of a concrete accelerator. The acidic wastewater is used as a basic raw material, alkaline liquid is avoided, then the acidic wastewater is mixed with the aluminum ash and the blast furnace slag, substances such as aluminum, magnesium and calcium in the acidic wastewater are dissolved through acidic substances, and then the acidic wastewater and the added particles are decomposed under the action of high temperature and high pressure, so that the content of metal salt is increased; fluosilicic acid metal salt are formed, then a flocculating agent is formed through monomer polymerization, and the formed substances are flocculated, so that the combination of particles is increased, an alcohol amine substance is formed through the reaction of ethanolamine and ethylene oxide, the dispersing performance of the accelerator can be effectively improved, and the concrete accelerator is formed.

Description

technical field [0001] The invention belongs to the technical field of concrete additives, and in particular relates to a preparation method of a concrete quick-setting agent. Background technique [0002] Shotcrete technology is widely used in surrounding rock support in geotechnical engineering and underground engineering. Accelerator is an indispensable admixture in shotcrete. It can make cement harden quickly, reduce rebound loss, and prevent shotcrete from The shedding caused by gravity improves its adaptability to use in wet or water-bearing rock formations, and produces higher early strength, increasing the thickness of a shot, and its performance has a greater impact on shotcrete. [0003] Accelerators are mainly divided into powder accelerators and liquid accelerators. Powder accelerators are mostly used in dry shotcrete, and liquid accelerators are mainly used in wet shotcrete. Traditional accelerators are mostly powder accelerators with high alkalinity, which hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/28C04B103/12
CPCC04B40/0039C04B2103/12C04B18/18C04B18/04C04B18/144C04B18/141C04B14/045C04B22/12C04B22/066C04B22/06C04B24/124C04B24/06C04B22/14C04B24/04C04B14/305C04B24/122C04B24/281
Inventor 谭桂红
Owner 成都楠裘榕科技有限公司
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