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Preparation method of highly adaptable non-alkali quick-setting agent auxiliary material

A technology of adaptability and auxiliary materials, which is applied in the field of chemical industry of concrete admixtures and cement-based cementitious materials

Active Publication Date: 2019-12-24
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Most of the above-mentioned patents are preparation methods of non-alkali quick-setting agent, and the adaptability of the non-alkali quick-setting agent is also one of the difficulties that the above-mentioned patents try to solve

Method used

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  • Preparation method of highly adaptable non-alkali quick-setting agent auxiliary material

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Effect test

Embodiment 2

[0049] Step 1: preparing a cationic polymer, characterized in that: the cationic polymer is polymerized from the following components by mass percentage, the total mass is 100, and the mass fraction of its semi-finished product is 40%. The preparation method is as follows:

[0050] 1) Add 3.5 parts of 2-acrylamide-2-methylpropanesulfonic acid, 5.4 parts of sodium hypophosphite monohydrate and 7 parts of water into the reaction kettle, stir to dissolve;

[0051] 2) Measure the temperature in the kettle, control the temperature at 20°C, and after the temperature stabilizes, add 2.7 parts of ammonium persulfate at one time;

[0052] 3) After adding ammonium persulfate for 5 minutes, start to drop the initiator and the small monomer solution in sequence. After the initiator is added, start to add the small monomer solution dropwise within 10 minutes. The time for adding the small monomer solution is 1.3 hours. The addition time is 1.8 hours; the initiator is composed of 4 parts of...

Embodiment 3

[0063] Step 1: preparing a cationic polymer, characterized in that: the cationic polymer is polymerized from the following components by mass percentage, the total mass is 100, and the mass fraction of its semi-finished product is 40%. The preparation method is as follows:

[0064] 1) Add 5 parts of 2-acrylamide-2-methylpropanesulfonic acid, 5.6 parts of sodium hypophosphite monohydrate and 6 parts of water into the reaction kettle, stir to dissolve;

[0065] 2) Measure the temperature in the kettle, control the temperature at 18°C, and after the temperature is stable, add 2 parts of ammonium persulfate at one time;

[0066] 3) After adding ammonium persulfate for 5 minutes, start to drop the initiator and the small monomer solution in sequence. After the initiator is added, start to add the small monomer solution dropwise within 10 minutes. The time for adding the small monomer solution is 1.5 hours. The addition time is 2 hours; the initiator is composed of 2.1 parts of merc...

Embodiment 4

[0077] Step 1: preparing a cationic polymer, characterized in that: the cationic polymer is polymerized from the following components by mass percentage, the total mass is 100, and the mass fraction of its semi-finished product is 40%. The preparation method is as follows:

[0078] 1) Add 4 parts of 2-acrylamide-2-methylpropanesulfonic acid, 5 parts of sodium hypophosphite monohydrate and 9 parts of water into the reaction kettle, stir to dissolve;

[0079] 2) Measure the temperature in the kettle, control the temperature at 15°C, and after the temperature stabilizes, add 4 parts of ammonium persulfate at one time;

[0080] 3) After adding ammonium persulfate for 5 minutes, start to drop the initiator and the small monomer solution in sequence. After the initiator is added, start to add the small monomer solution dropwise within 10 minutes. The time for adding the small monomer solution is 1.8 hours. The addition time is 2.3 hours; the initiator is composed of 3.8 parts of mer...

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Abstract

The invention relates to a preparation method of an auxiliary material for a high-adaptability alkali-free quick-setting agent. The auxiliary material is a solution mixture with the mass fraction of 40%, and a raw material formula thereof comprises the following components in percent by weight: 30-55% of a metal sulfate solution, 10-20% of a cationic compound solution, 15-35% of a cationic polymer, 20-40% of an intercalating agent and 1-5% of a wetting agent, wherein the cationic polymer is self-prepared, and comprises the following components: 2-acrylamide-2-methyl propanesulfonic acid, sodium hypophosphite monohydrate, ammonium persulfate, mercaptoethanol, sodium formaldehyde sulfoxylate, acrylamide, a quaternary phosphonium salt cationic monomer, sodium metabisulfite, liquid caustic soda and the balance of water. A product prepared by the prepared method provided by the invention can be directly compounded into the alkali-free quick-setting agent; a design concept is achieved from aspects such as increase in the dissolution rate of calcium ions, increase in the amount of an early strength hydration product, improvement on the dispersion degree and the like; in allusion to a using current situation that an alkali-free quick-setting agent product synthesizing system has different complexities, the setting time and strength indexes cannot meet standards overall or the adaptability is relatively poor, the performance and the adaptability of the alkali-free quick-setting agent are improved.

Description

technical field [0001] The invention belongs to the technical field of concrete admixture, relates to the technical field of cement-based cementitious material chemical industry, and is used in key projects such as mine shafts, railway tunnels, water diversion culverts, underground projects, road bridges, tunnels, high-speed rail, nuclear power and the like. Background technique [0002] There are many factors affecting the adaptability of accelerators and cement, mainly in the fineness of cement, gypsum type, gypsum content and tricalcium aluminate content. C 3 A's matching requirements. Existing quick-setting agents cannot be adapted to a variety of cements on site at the same time, such as low activity cement, low C 3 S content cement, low specific surface area cement, medium and low heat cement, overvulcanized cement, undervulcanized cement, etc. In addition, alkali-free accelerators have expensive production costs and the application status of high dosage. Among them...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/32C08F220/56C08F230/02C08F220/58C04B103/12
Inventor 柯凯占聪文帅涛常鹰
Owner HUBEI UNIV OF TECH