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Alkali-free chloride-free sulfate-free liquid accelerator

A technology of sulfate and quick-setting agent, which is applied in the field of concrete admixtures, can solve problems such as difficulty in construction, and achieve the effects of reducing rebound rate, accelerating setting time, and good cement adaptability

Active Publication Date: 2018-04-24
JIANGSU SOBUTE NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the requirement that the alkali-free accelerator cannot contain sulfate radicals in the above-mentioned sulfate corrosion environment, and the core components of the existing accelerators are all aluminum sulfate, or even if aluminum sulfate is not used, other components are used, and it is difficult to The problem of construction, the present invention provides a kind of alkali-free, chlorine-free and sulfate-free liquid quick-setting agent and its preparation method and application

Method used

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  • Alkali-free chloride-free sulfate-free liquid accelerator
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  • Alkali-free chloride-free sulfate-free liquid accelerator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 3

[0025] The performance of different cements of table 2 embodiment 3 liquid quick-setting agent

[0026] cement type

benchmark cement

Helin Cement

Onoda Cement

Huaxin Cement

Conch Cement

Accelerator dosage

6％

8％

4％

8％

8％

Initial setting time

3:10

2:50

4:30

3:45

4:05

final setting time

8:25

7:45

11:27

9:55

11:28

1 day strength (MPa)

12.5

10.6

15.9

9.9

12.6

28 days strength ratio (%)

102

100

105

110

100

[0027] Prepare different quick-setting agents according to the formula in Table 3 below. At 80°C, mix 80% phosphoric acid, aluminum hydroxide and water and stir until the aluminum hydroxide is completely dissolved; add organic alcohol amine coagulation accelerator components respectively under stirring and inorganic fluorine-containing coagulation accelerator components, stirred for 30 minutes, added antifreeze components, continued to st...

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Abstract

The invention discloses an alkali-free chloride-free sulfate-free liquid accelerator applicable to a sulfate corrosion environment. The liquid accelerator is composed of aluminum dihydrogen phosphate,an organic alcohol amine coagulating component, an inorganic fluorine-containing coagulating component, an alkali thickening rheological agent component, an antifreeze agent component and water. Theliquid accelerator disclosed by the invention does not contain sodium, potassium, chlorine and sulfate, has an excellent coagulating effect, is short in coagulation time during construction, high in strength and low in resilience rate, has excellent low-temperature storage and application functions, and is particularly suitable for application of sprayed concrete and stoppage and rush-repair engineering in inland and coastal sulfate environments.

Description

technical field [0001] The invention belongs to the field of concrete admixtures, and in particular relates to an alkali-free, chlorine-free and sulfur-free liquid quick-setting agent which can be used in a sulfate corrosion environment, and a preparation method and application thereof. Background technique [0002] With the continuous development of concrete technology, admixtures have become an indispensable part of modern concrete. Using concrete admixtures to improve concrete construction performance, mechanical properties and durability has become the focus of research and application. Accelerator plays an indispensable role in the construction of shotcrete construction and plugging and emergency repairs. [0003] Accelerator is a kind of admixture that makes cement concrete harden quickly, and is mainly used in projects such as shotcrete and plugging and repairing. Its development has gone through the stage from powder accelerator to liquid accelerator, from alkali ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/26C04B24/28C04B103/12
CPCC04B40/0039C04B2103/12C04B22/16C04B24/122C04B22/126C04B24/026C04B2103/44C04B24/126C04B24/2623
Inventor 王瑞王伟张小磊张建纲赵爽
Owner JIANGSU SOBUTE NEW MATERIALS
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