Anti-freezing early-strength alkali-free liquid setting accelerator and preparation method thereof

A technology of early-strength type and quick-setting agent, applied in the field of concrete admixtures, can solve the problems of low early strength and reduced stability of shotcrete, inhibit the hydrolysis of aluminum ions into aluminum hydroxide gel precipitation, promote the formation, improve the effect of composition

Active Publication Date: 2021-06-29
JIANGSU SOBUTE NEW MATERIALS +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problem of low stability of alkali-free liquid accelerator and low early strength of shotcrete in low temperature environment, the present invention provides an antifreeze early-strength type alkali-free liquid accelerator and its preparation method, which has strong operability and can be Improving the low temperature antifreeze and early strength performance of alkali-free accelerator

Method used

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  • Anti-freezing early-strength alkali-free liquid setting accelerator and preparation method thereof
  • Anti-freezing early-strength alkali-free liquid setting accelerator and preparation method thereof
  • Anti-freezing early-strength alkali-free liquid setting accelerator and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] The preparation of a kind of antifreeze early-strength type non-alkali liquid quick-setting agent comprises the following steps:

[0042] (1) Mix 45g of aluminum sulfate, 5g of magnesium fluorosilicate, 7g of triethanolamine, 3g of aminoethylethanolamine and 38g of water, and keep it warm for 3 hours at a temperature of 80°C; add modified hydrated silicic acid after cooling down to 50°C Magnesium-modified hydrated magnesium silicate and 1g of modified diatomite are mixed evenly to obtain the coagulation-adjusting component;

[0043] (2) Mix 20 g of glutamic acid, 30 g of alanine and 50 g of water, and heat and stir for 0.5 h at a temperature of 50° C. to obtain the required solubilizing component;

[0044](3) Mix 5g of lithium nitrate, 25g of bismuth nitrate, 5g of methanesulfonic acid, 5g of sulfamic acid with 60g of water, and heat and stir for 1 hour at a temperature of 50°C to obtain the required antifreeze early strength component;

[0045] (4) At a temperature of...

Embodiment 2

[0047] The preparation of a kind of antifreeze early-strength type non-alkali liquid quick-setting agent comprises the following steps:

[0048] (1) Mix 35g of aluminum sulfate, 2g of sodium fluorosilicate, 5g of diethanolamine and 57g of water, and keep it warm for 1 hour at a temperature of 70°C; after cooling down to 45°C, add 1g of modified metakaolin, and mix well to get the tune Coagulation component;

[0049] (2) Mix 20 g of aspartic acid, 20 g of alanine and 60 g of water, and heat and stir for 1 hour at a temperature of 45° C. to obtain the required solubilizing component;

[0050] (3) Mix 5 g of lithium nitrate, 15 g of beryllium nitrate, 5 g of benzenesulfonic acid and 75 g of water, and heat and stir for 1 hour at a temperature of 45° C. to obtain the desired antifreeze early strength component;

[0051] (4) At a temperature of 45°C, add 2g of the solubilizing component and 15g of the antifreeze early-strength component to 83g of the coagulation-adjusting componen...

Embodiment 3

[0053] The preparation of a kind of antifreeze early-strength type non-alkali liquid quick-setting agent comprises the following steps:

[0054] (1) Mix 40g of aluminum sulfate, 3g of potassium fluorosilicate, 3g of triisopropanolamine, 5g of diethylenetriamine and 47g of water, and keep it warm for 2 hours at a temperature of 75°C; after cooling down to 45°C, add 2g of modified Non-toxic hydrated magnesium silicate, mixed evenly to obtain the coagulation-adjusting component;

[0055] (2) Mix 15g of glutamic acid, 15g of alanine, 15g of aspartic acid and 55g of water, and heat and stir for 1 hour at a temperature of 45°C to obtain the required solubilizing component;

[0056] (3) Mix 3g of lithium nitrate, 15g of beryllium nitrate, 12g of bismuth nitrate, 5g of methanesulfonic acid, 5g of benzenesulfonic acid with 60g of water, and heat and stir for 1 hour at a temperature of 45°C to obtain the required antifreeze early strength composition Minute;

[0057] (4) At a temperat...

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Abstract

The invention discloses an anti-freezing early-strength alkali-free liquid setting accelerator and a preparation method thereof. The setting accelerator is prepared by mixing a setting adjusting component, a solubilizing component and an anti-freezing early strength component; the setting adjusting component comprises aluminum sulfate, fluosilicate, alkylol amine, a stabilizer and water, the solubilizing component comprises amino acid and water, and the anti-freezing early strength component comprises nitrate, sulfonic acid and water. According to the setting accelerator disclosed by the invention, the freezing point of an accelerator solvent water is reduced, aluminum ions are inhibited from being hydrolyzed into aluminum hydroxide gel precipitates, and the dissolving stability of inorganic salts such as aluminum sulfate is improved, so that the accelerator does not freeze and lose efficacy in a low-temperature environment, and the heat preservation requirement in the transportation and storage process is avoided; nitrate is adopted to improve the formation of cement hydration liquid phase ions and promote the formation of hydration products; meanwhile, the sulfonic acid can reduce the retarding effect of ettringite on inhibiting cement hydration and promote hydration of cement minerals; and through the synergistic effect of the two components, the setting and hardening process of the cement is accelerated, and the quick-hardening and early-strength effects at low temperature are realized.

Description

technical field [0001] The invention belongs to the field of concrete admixtures, and in particular relates to an antifreeze early strength type alkali-free liquid accelerator and a preparation method thereof. Background technique [0002] Shotcrete has many advantages such as simple process, high construction efficiency, good support effect, strong adaptability, and significant economic benefits. Accelerators endow cement concrete with the characteristics of rapid setting and hardening, and play a decisive role in shotcrete. At present, the accelerator can be divided into powder and liquid according to the state, and can be divided into alkali, low alkali and alkali-free according to the alkali content. Among them, the alkali-free liquid accelerator can significantly reduce the dust content in the construction environment, and has the safety of production and use. The advantages of environmental protection, fast setting and hardening, high strength guarantee rate, and no a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/16C04B24/20C04B24/12C04B103/12C04B103/60
CPCC04B40/0039C04B2103/12C04B2103/601C04B22/148C04B22/126C04B24/122C04B22/08C04B22/06C04B24/123C04B22/085C04B24/16C04B24/20C04B24/121
Inventor 赵爽乔敏王伟张小磊曾鲁平洪锦祥冉千平
Owner JIANGSU SOBUTE NEW MATERIALS
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