A kind of preparation method of early-strength type non-alkali liquid quick-setting agent

A technology of quick-setting agent and early-strength type, which is applied in the field of early-strength alkali-free liquid quick-setting agent and its preparation, and can solve the problems such as the decrease of concrete strength and durability, the low early strength of the quick-setting agent, and the corrosion damage of construction personnel. , to achieve the effect of reducing the possibility and good adaptability

Active Publication Date: 2021-03-02
SHANDONG HONGYI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high alkali content in the concrete quick-setting agent will cause corrosion damage to the construction personnel on the one hand and damage human health. On the other hand, it may also cause the alkali-aggregate reaction of the concrete, resulting in a decrease in the strength and durability of the concrete in the later stage.
The invention patent disclosed by Chang'an University (application number: 2016110965096) provides an accelerator with low early strength, which is likely to affect the normal construction of shotcrete

Method used

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  • A kind of preparation method of early-strength type non-alkali liquid quick-setting agent

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Embodiment 1

[0022]A preparation method of an early-strength alkali-free liquid quick-setting agent, comprising the following steps:

[0023](1) Preparation method of modified alcohol amine: Add alcohol amine, amine organics and catalyst into a 250ml four-necked flask equipped with mechanical stirring device, circulating condensation device and thermometer, the molar ratio of which is 1:3:0.005, at 65 After reacting at °C for 1 hour, add 2 mol of organic acid to the resulting mixed solution and react for 0.5 hours to obtain a modified alcohol amine;

[0024](2) Preparation of early-strength alkali-free liquid quick-setting agent: first put 60g of aluminum sulfate, 6g of magnesium sulfate and 6g of organic acid in a three-necked flask, then add 30g of deionized water, at a temperature of 400r / Min stirring for 1.5h to obtain the accelerator mother liquor; stir at 350r / min under a constant temperature water bath at 65℃, and then add 6g of the modified alcohol amine obtained in step (1) to the accelerato...

Embodiment 2

[0035]A preparation method of an early-strength alkali-free liquid quick-setting agent, comprising the following steps:

[0036](1) Preparation method of modified alcohol amine: Add alcohol amine, amine organics and catalyst into a 250 ml four-necked flask equipped with a mechanical stirring device, a circulating condensation device and a thermometer. The molar ratio of the alcohol amine, amine organics and catalyst is 1:2.5:0.0045. After reacting at 65°C for 1.5 hours, add 3 mol of organic acid to the resulting mixed solution to react for 45 minutes to obtain a modified alcohol amine;

[0037](2) Preparation of early-strength alkali-free liquid quick-setting agent: first put 75g aluminum sulfate, 8g magnesium sulfate and 5g organic acid in a three-necked flask, then add 19g deionized water, at a temperature of 400r / Min stirring for 2h to obtain the accelerator mother liquor; stir at 400r / min under a constant temperature water bath at 65°C, then add 10g of the modified alcohol amine obta...

Embodiment 3

[0048]A preparation method of an early-strength alkali-free liquid quick-setting agent, comprising the following steps:

[0049](1) Preparation method of modified alcohol amine: Add alcohol amine, amine organics and catalyst into a 250 ml four-necked flask equipped with mechanical stirring device, circulating condensation device and thermometer, the molar ratio of which is 1:3:0.01. After reacting at 75°C for 1 hour, add 3 mol of organic acid to the resulting mixed solution to react for 45 minutes to obtain a modified alcohol amine;

[0050](2) Preparation of early-strength alkali-free liquid quick-setting agent: first put 85g aluminum sulfate, 10g magnesium sulfate and 5g organic acid in a three-necked flask, and then add 20g deionized water, at a constant temperature of 85 ℃ water bath at 400r / Min stirring for 2h to obtain the accelerator mother liquor; stir at a constant temperature of 70℃ in a water bath at 400r / min, then add 10g of the modified alcohol amine obtained in step (1) to ...

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Abstract

The invention discloses a preparation method of an early-strength non-alkali liquid quick-setting agent, which belongs to the technical field of building materials. The quick-setting agent of the present invention is prepared from the following components in mass percentage: 55%-70% of aluminum sulfate, 5%-10% of magnesium sulfate, 5%-10% of modified alcohol amine, and 2%-10% of organic acid 5%, stabilizer 1%-3%, EDTA 1%-3%, calcium formate 0.5%-2%, and the rest is water. Specifically, the method comprises the following steps: (1) preparation of modified alcohol amine; (2): preparation of early-strength non-alkali liquid accelerator. The early-strength type alkali-free liquid quick-setting agent prepared by the present invention can be used in the shotcrete industry, and its alkali content is less than 1%, and the stable period exceeds 3 months, and the 1d compressive strength can reach 19.93MPa, and the 28d compressive strength loss is small, It is an early-strength non-alkali liquid accelerator, which can be widely used in the initial construction and emergency repair of various construction projects.

Description

Technical field[0001]The invention belongs to the technical field of building materials, and specifically relates to an early-strength type alkali-free liquid quick-setting agent and a preparation method thereof.Background technique[0002]Accelerating agent refers to an admixture used in cement concrete to quickly set and harden. Since the 1990s of the 20th century, my country has promoted the wet spraying of concrete construction technology, and ensuring the quality of the sprayed product and a reasonable construction process have become key issues. The prerequisite guarantee is to develop a quick-setting agent with excellent performance and good coagulation effect.[0003]At present, there are two types of quick-setting admixtures: powder and liquid. Among them, powder quick-setting admixtures are gradually being replaced by liquid quick-setting admixtures because of poor construction conditions and damage to the health of the constructors. The construction process should not be cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/16C04B103/12
CPCC04B40/0039C04B2103/12C04B24/122C04B22/148C04B22/142C04B24/04C04B24/16C04B24/12
Inventor 王志强宋南京潘玉杰司宏振秦尤敏李耀张辉
Owner SHANDONG HONGYI TECH
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