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Organic modified polyaluminum sulfate alkali-free liquid accelerator, preparation method thereof and early-strength alkali-free liquid accelerator

A technology of polyaluminum sulfate and accelerator, which is applied in the field of organically modified polyaluminum sulfate alkali-free liquid accelerator and its preparation, early-strength liquid alkali-free accelerator, and can solve problems such as incompatibility of early-strength components , to achieve the effect of realizing early strength properties, improving homogeneity, and promoting transfer

Pending Publication Date: 2022-07-01
JIANGSU SOBUTE NEW MATERIALS +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Aiming at the problem of the stable component of the polyaluminum sulfate alkali-free liquid accelerator and the incompatibility with the early-strength component, the present invention provides an organically modified polyaluminum sulfate alkali-free liquid accelerator and its preparation method, which is operable Strong, it has excellent quick-setting effect and good product stability, and it can be compounded with early-strength components to obtain early-strength liquid alkali-free accelerator, which can take into account product stability and early-strength performance

Method used

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  • Organic modified polyaluminum sulfate alkali-free liquid accelerator, preparation method thereof and early-strength alkali-free liquid accelerator
  • Organic modified polyaluminum sulfate alkali-free liquid accelerator, preparation method thereof and early-strength alkali-free liquid accelerator
  • Organic modified polyaluminum sulfate alkali-free liquid accelerator, preparation method thereof and early-strength alkali-free liquid accelerator

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Effect test

Embodiment 1

[0052] A preparation method of an early-strength organically modified polymeric aluminum sulfate alkali-free liquid accelerator, comprising the following steps:

[0053] (1) 50g aluminum sulfate is added in the reaction vessel that 43.49g water, 1.5g diethanolamine, 1.5g triethanolamine are housed, under the condition that temperature 50~60 ℃ and stirring speed are 250~300r / min, be incubated 0.5~ 1.0h; after the aluminum sulfate was completely dissolved, 2g of ammonia water was added dropwise, and the solution was kept warm for 6h to obtain a polyaluminum sulfate solution. Add 0.5g of acrylic acid, 0.5g of acrylamide, 0.3g of Span60 and 0.2g of Span80 to the reaction vessel containing the polyaluminum sulfate solution in turn, pass nitrogen for 0.5h to remove the air, and then add 0.01g of azodiisobutylamidine hydrochloric acid salt, the temperature is 50~60 ℃ constant temperature reaction 5h, obtains the organic modified polyaluminum sulfate emulsion.

[0054] (2) 79.5 g of ...

Embodiment 2

[0057] A preparation method of an early-strength organically modified polymeric aluminum sulfate alkali-free liquid accelerator, comprising the following steps:

[0058] (1) 55g aluminum sulfate is added in the reaction vessel that 35.57g water, 2.5g diethanolamine, 1.5g triethanolamine are housed, under the condition that temperature 50~60 ℃ and stirring speed are 250~300r / min, Heat preservation for 0.5 to 1.0 h; after the aluminum sulfate is completely dissolved, drop 3 g of ammonia water, heat preservation and aging for 6 h to obtain a polyaluminum sulfate solution. Add 0.5g of acrylic acid, 0.5g of acrylamide, 0.5g of N-methylol acrylamide, 0.3g of Span60, 0.3g of Span80 and 0.3g of Tween85 to the reaction vessel containing the polyaluminum sulfate solution in turn, and pass in 0.5h of nitrogen to remove air, then add 0.01 g of azobisisobutylamidine hydrochloride and 0.02 g of azobisisobutyronitrile, and react at a constant temperature of 50-60 DEG C for 5 hours to obtain ...

Embodiment 3

[0062] A preparation method of an early-strength organically modified polymeric aluminum sulfate alkali-free liquid accelerator, comprising the following steps:

[0063] (1) 60g aluminum sulfate is added in the reaction vessel that is equipped with 26.95g water, 3.0g diethanolamine, 1.0g triethanolamine, 1.0g triethanolamine, at temperature 50~60 ℃ and stirring speed are 250~300r / Under the condition of min, the temperature is kept for 0.5-1.0 h; after the aluminum sulfate is completely dissolved, 5 g of ammonia water is added dropwise, and the solution is heated and aged for 6 h to obtain a polyaluminum sulfate solution. 0.8g of acrylic acid, 0.8g of acrylamide, 0.4g of N-methylol acrylamide, 0.5g of Span60, and 0.5g of Tween85 were successively added to the reaction vessel containing the polyaluminum sulfate solution, and nitrogen was introduced for 0.5h to remove air, and then 0.03 g of azobisisoheptyl nitrile and 0.02 g of dimethyl azobisisobutyrate are added, and the temp...

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Abstract

The invention discloses an organic modified polyaluminum sulfate alkali-free liquid accelerator, a preparation method thereof and an early-strength liquid alkali-free accelerator, the organic modified polyaluminum sulfate alkali-free liquid accelerator is an organic modified polyaluminum sulfate emulsion, and the organic modified polyaluminum sulfate alkali-free liquid accelerator is synthesized from the following raw materials: 50%-60% of aluminum sulfate, 2%-5% of ammonia water and 3%-5% of alcohol amine; 1%-2% of a polymeric monomer, 0.5%-1% of a dispersing agent, 0.01%-0.05% of an initiator and the balance of water. The synthesis method of the alkali-free liquid accelerator is high in operability, the alkali-free liquid accelerator has an excellent rapid setting effect and good product stability, the alkali-free liquid accelerator can be compounded with an early-strength component to obtain an early-strength liquid alkali-free accelerator, and the product stability and the early-strength performance can be both considered.

Description

technical field [0001] The invention belongs to the field of concrete admixtures, and in particular relates to an organically modified polymeric aluminum sulfate alkali-free liquid accelerator and a preparation method thereof, and an early-strength liquid alkali-free accelerator. Background technique [0002] The alkali-free liquid accelerator can significantly reduce the dust content of the construction environment, and has the advantages of safe and environmentally friendly production and use, fast setting and hardening, high strength assurance rate, and alkali-free aggregate damage. It is widely used in shotcrete. Aluminum phase materials can promote the formation of ettringite and shorten the setting and hardening process of cement-based materials. One of the most effective ways to increase the content of aluminum phase is to use polyaluminum sulfate to increase the coagulation and hardening effect of the accelerator. [0003] CN103553406 A "An alkali-free and chlorine-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F220/06C08F220/56C08F220/58C04B24/26
CPCC08F292/00C04B24/2688C04B24/26C04B24/2652C04B24/42C04B40/0039C04B2103/12C08F220/06C08F220/56C08F220/58C04B24/405Y02W30/91
Inventor 赵爽王伟曽鲁平陈俊松乔敏吴井志高南箫单广程洪锦祥冉千平
Owner JIANGSU SOBUTE NEW MATERIALS
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