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Liquid accelerating agent and preparing method and application thereof

A technology of accelerator and liquid, which is applied in the field of liquid accelerator and its preparation, can solve the problems of high fluorination of drinking water, etc., and achieve the effects of less investment in equipment, low price of finished products, and good adaptability

Inactive Publication Date: 2019-05-21
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] If the accelerator with high fluorine content is used in large quantities, it will lead to high fluoridation of drinking water, which will cause more fluorosis. Therefore, it is necessary to study a chlorine-free, fluorine-free and alkali-free liquid accelerator

Method used

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  • Liquid accelerating agent and preparing method and application thereof

Examples

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Effect test

preparation example Construction

[0034] The preparation method of the above-mentioned chlorine-free, fluorine-free and alkali-free low-cost liquid quick-setting agent comprises the following steps:

[0035] Step 1: At room temperature, add water, amide and silicate into a stirring container for stirring at a stirring speed of 1000-3000r / min, stirring for 2 to 5 minutes to disperse the silicate evenly; then add alcohol amine and continue stirring for 7 ~10min, until the alcohol amine is mixed evenly.

[0036] Step 2, then quickly add aluminum hydroxide and aluminum sulfate into the stirring vessel, and continue stirring for 30-40 minutes until the aluminum hydroxide and aluminum sulfate are uniformly dispersed.

[0037] Step 3, adding phosphoric acid to the stirred solution, and stirring evenly, to obtain the liquid quick-setting agent of the present invention.

[0038] When the liquid quick-setting agent of the present invention is used, according to the experimental conditions of GB / T 35159-2017, the presen...

Embodiment

[0040]Use the preparation method of the present invention to carry out the preparation of chlorine-free, fluorine-free and alkali-free liquid quick-setting agent, and according to the test method in standard shotcrete quick-setting agent GB / T 35159-2017, use benchmark cement 400g, water consumption 140g (comprising water contained in the liquid quick-setting agent), according to the recommended amount of cement weight, mixed with chlorine-free, fluorine-free and alkali-free low-cost liquid quick-setting agent, and carried out the setting time measurement experiment; using 900g of benchmark cement, 1350g of standard sand, and 450g of water (including water contained in the liquid quick-setting agent), according to the recommended dosage of cement weight, mixed with chlorine-free, fluorine-free, alkali-free and low-cost liquid quick-setting agent, and carried out the compressive strength measurement experiment. The specific implementation results are shown in Table 1, and the ser...

Embodiment 2

[0042] In Example 2, in step 1, water, formamide and magnesium silicate were added to the stirring container, and the stirring speed was 2000r / min, and the stirring time was 4min; monoethanolamine was added and stirred continuously for 8min until the monoethanolamine was mixed evenly; in step 2 , the stirring time is 35min, until the aluminum hydroxide and aluminum sulfate are uniformly dispersed. The mass percentage of each component is: 60% of aluminum sulfate, 4% of phosphoric acid, 2% of formamide, 6% of aluminum hydroxide, 8% of monoethanolamine, 1% of magnesium silicate, and the rest is water.

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Abstract

The invention relates to the field of building materials, in particular to a liquid accelerating agent and a preparing method and application thereof. The liquid accelerating agent is a chloride-free,fluoride-free, alkali-free and low-cost liquid accelerating agent, and is prepared from, by mass, 50%-70% of aluminum sulfate, 1%-7% of phosphoric acid, 1%-5% of amide, 1%-10% of aluminum hydroxide,1%-8% of alkylol amine, 1%-5% of silicate and the balance water. The chloride-free and alkali-free liquid accelerating agent is white thick liquid, the density is 1.30 g / cm<3> to 1.55 g / cm<3>, the pHvalue is 2.5 to 4.5, and the solid content is 30% to 50%. The liquid accelerating agent has the advantages of being low in cost, capable of being prepared at the room temperature, simple in productiontechnology and the like, and is suitable for industrial mass production, a finished product of the liquid accelerating agent is non-corrosive, and the liquid accelerating agent can be safely appliedto construction.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a liquid quick-setting agent and its preparation method and application. The liquid quick-setting agent is chlorine-free, fluorine-free, alkali-free and low in cost. Background technique [0002] Shotcrete is an important part of tunnel or underground space construction. It has the advantages of simple process, good cohesiveness, fast construction, saving formwork, reasonable economy and strong adaptability. It is an important modern construction method in large-scale engineering construction such as building structure reinforcement and reinforcement. It is often used in the lining of grouted tunnels, walls, ceilings and other thin-walled structures or other structures, as well as the protective layer of steel structures, and the application of shotcrete is inseparable from a chemical admixture - accelerator. [0003] Accelerator is an admixture that can s...

Claims

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Application Information

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IPC IPC(8): C04B24/12C04B103/12
Inventor 李国新张江波
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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