Ammonium salt organic amine early-strength non-alkaline accelerator and preparation method thereof

An organic amine and early-strength technology, which is applied in the field of ammonium salt organic amine early-strength non-alkaline accelerator and its preparation, and the field of wet-mix shotcrete for tunnel engineering, can solve the problem of unfavorable durability and early strength of concrete. Insufficient, skin corrosion damage and other problems, to achieve the effect of shortening the initial setting time, high early strength, shortening the setting time

Inactive Publication Date: 2020-01-17
绵阳市安州区荣盛建材有限公司
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the main components of traditional accelerators are alumina clinker, sodium aluminate, carbonate, sodium silicate and other inorganic salts. Although this accelerator can basically meet the engineering requirements for setting time and early strength requirements, but this quick-setting agent is strongly alkaline, and the pH value of ordinary

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Ammonium salt organic amine early-strength non-alkaline accelerator and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] Example 1:

[0029] An ammonium salt organic amine early-strength non-alkaline quick-setting agent, composed of 20g water, 10g hydrofluoric acid with a mass fraction (that is, mass percentage, the same hereinafter) of 20%, 7g aluminum hydroxide, 0.25g triethanolamine, two It is made of 0.25g ethanolamine, 40g aluminum sulfate, 18g sodium sulfate, 3g sodium hydroxide aqueous solution with a mass fraction of 30%, 1g amine nitrate, 0.2g copper sulfate, and 0.3g polyacrylamide.

[0030] The specific method for preparing the ammonium salt organic amine early-strength non-alkaline quick-setting agent is: sequentially add 20 g of water and 20% mass fraction of hydrogen fluoride into a 500 ml three-necked or four-necked flask equipped with stirring, heating and cooling devices Acid 10g, aluminum hydroxide 7g, stir and observe the temperature rise, after 10 minutes, raise the temperature to 65-80℃, stir for 20 minutes, add 0.25g triethanolamine and 0.25g diethanolamine, add 40g alumi...

Example Embodiment

[0032] Example 2:

[0033] An ammonium salt organic amine early-strength non-alkaline accelerator, composed of 16.51g of water, 12g of 20% hydrofluoric acid, 8g of aluminum hydroxide, 0.6g of triethanolamine, 38g of aluminum sulfate, and 19g of sodium sulfate. 4 g of sodium hydroxide aqueous solution with a mass fraction of 30%, 1.3 g of amine nitrate, 0.3 g of copper sulfate, and 0.29 g of polyacrylamide are mixed and prepared.

[0034] The specific method for preparing the ammonium salt organic amine early-strength non-alkaline quick-setting agent is: sequentially adding 12 g of hydrofluoric acid with a mass fraction of 20% into a 500 ml three-necked or four-necked flask equipped with stirring, heating and cooling devices, Add 8g of aluminum hydroxide with stirring, increase the temperature to 65-80°C, add 0.6g of triethanolamine after stirring for 20 minutes, add 38g of aluminum sulfate after stirring for 10 minutes, stir for 30 minutes and adjust the temperature to 65-80°C, add...

Example Embodiment

[0036] Example 3:

[0037] An ammonium salt organic amine early-strength non-alkaline accelerator, composed of 19.86g of water, 14g of 20% hydrofluoric acid, 9g of aluminum hydroxide, 0.7g of triethanolamine, 40g of aluminum sulfate, and 10g of sodium sulfate. It is prepared by mixing 4.5 g of 30% sodium hydroxide aqueous solution, 1.4 g of amine nitrate, 0.3 g of copper sulfate, and 0.24 g of polyacrylamide.

[0038] The preparation method is as follows: in a 500ml three-necked or four-necked flask equipped with stirring, condensing and heating devices, the raw materials are sequentially added to water and hydrofluoric acid, then aluminum hydroxide is added, and the organic amine is added after stirring for 20 minutes, and after stirring for 10 minutes Add sulfuric acid, add sodium sulfate, sodium hydroxide solution, amine nitrate, copper sulfate, polyacrylamide after aluminum sulfate is completely dissolved. During the stirring, the temperature of the reactant is controlled at 5...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Compressive strengthaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses an ammonium salt organic amine early-strength non-alkaline accelerator which is characterized by consisting of the following raw materials in percentage by mass: 10-25% of hydrofluoric acid, 7-15% of aluminum hydroxide, 0.5-2% of organic amine, 15-40% of aluminum sulfate, 8-20% of sodium sulfate, 3-8% of a sodium hydroxide solution, 1-30% of nitrate amine, 0.2-1% of coppersulfate, 0.1-0.3% of polyacrylamide and the balance of water. The preparation method comprises the following steps: grinding aluminum sulfate and sodium sulfate, and performing screening; and adding the raw materials in sequence to a reactor, controlling the reactant temperature to 50-90 DEG C, after addition, and performing stirring for 30-50 minutes, so as to obtain an organic amine reinforced early-strength non-alkaline accelerator. The ammonium salt organic amine early-strength non-alkaline accelerator prepared by the invention has a standard alkali content, high early-strength, high later-strength and moderate cost, and can be widely used in tunnel engineering and construction.

Description

technical field [0001] The invention belongs to concrete admixture and its preparation, and relates to an ammonium salt organic amine early-strength non-alkaline accelerator and a preparation method thereof. The ammonium salt organic amine early-strength non-alkaline accelerator is especially suitable for tunnels Constituent material of engineering wet-mix shotcrete. Background technique [0002] Shotcrete construction has good molding conditions, and has many advantages that ordinary formwork pouring concrete cannot match. Shotcrete is often used in high-speed rail, expressway tunnel initial support, walls, water diversion, lining of tunnel engineering or other structures, and protective layer of steel structures. Scope of application of the project. Accelerator is an important component material of sprayed concrete, which can significantly shorten the setting and hardening time of concrete slurry, increase the thickness of a sprayed layer, and shorten the time interval b...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C04B24/26C04B103/12
CPCC04B40/0039C04B2103/12C04B22/126C04B22/06C04B24/122C04B22/148C04B22/147C04B22/062C04B22/085C04B22/142C04B24/2652
Inventor 李昌荣王小红李浩
Owner 绵阳市安州区荣盛建材有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap