Composite acetone enhanced alkali-free liquid setting accelerator

A technology of quick-setting agent and stabilizing enhancer, which is applied in the field of building materials for support engineering, and can solve the problems of concrete strength reduction, crystallization and delamination, skin damage, etc., to solve the problem of strong corrosion, improve compressive strength, reduce The effect of rebound rate

Inactive Publication Date: 2022-01-14
CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP +1
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alkaline quick-setting agent has high alkali content and strong corrosiveness, which is easy to cause damage to the respiratory system, eyes, skin, etc. of construction workers, and the introduction of a large amount of alkali metal into concrete will also cause the strength of concrete to decrease later, and the potential alkali-aggregate reaction Increased likelihood of occurrence, affecting durability of concrete
With the rapid development of high-speed railway, railway passenger dedicated line, urban underground space and the rapid advancement of wet spraying technology, alkaline accelerator can no longer meet the construction technical requirements
The advantages of non-alkali liquid accelerators on the later strength and durability of shotcrete have been widely recognized, but the main problem is that some products will appear unstable phenomena such as devitrification and delamination within 1-2 months. , the 1d compressive strength of most products does not meet the standard requirements

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
  • Composite acetone enhanced alkali-free liquid setting accelerator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The components in this example are: Fluosilicic acid: 17 parts by weight; Aluminum hydroxide: 4 parts by weight; Acrylic acid: 0.2 parts by weight; Aluminum sulfate: 36 parts by weight; Zinc oxide: 0.01 parts by weight; Magnesium hydroxide: 7 parts by weight Parts by weight; magnesium silicate: 4 parts by weight; potassium hydroxide: 0.4 parts by weight; suspending agent: 0.2 parts by weight; acetone: 0.1 parts by weight; stability enhancer: 0.4 parts by weight; tap water: 30.69 parts by weight;

[0026] According to the above composition ratio requirements, each raw material composition was weighed, and prepared according to the following method:

[0027] Step 1: Coordinate Fluorosilicic Acid

[0028] In order to control the production cost, this embodiment selects silica fume coordination; the silica fume used is required to be close to white, the silica content is greater than 85%, and the specific surface area is controlled at 20000m 2 / Kg; Add an appropriate amoun...

Embodiment 2

[0040] In this embodiment, the components are: fluosilicic acid: 18 parts by weight; aluminum hydroxide: 5 parts by weight; acrylic acid: 0.2 parts by weight; aluminum sulfate: 38 parts by weight; zinc oxide: 0.02 parts by weight; Parts by weight; magnesium silicate: 3 parts by weight; potassium hydroxide: 0.1 parts by weight; suspending agent: 0.3 parts by weight; acetone: 0.2 parts by weight; stability enhancer: 0.5 parts by weight; tap water: 26.68 parts by weight;

[0041] According to the above composition ratio requirements, each raw material composition was weighed, and prepared according to the following method:

[0042] Step 1: Coordinate Fluorosilicic Acid

[0043] In order to control the production cost, this embodiment selects silica fume coordination; the silica fume used is required to be close to white, the silica content is greater than 85%, and the specific surface area is controlled at 20000m 2 / Kg; Add an appropriate amount of silica fume into the weighed f...

Embodiment 3

[0055] The components in this embodiment are: fluosilicic acid: 19 parts by weight; aluminum hydroxide: 6 parts by weight; acrylic acid: 0.3 parts by weight; aluminum sulfate: 39 parts by weight; zinc oxide: 0.03 parts by weight; Parts by weight; magnesium silicate: 2 parts by weight; potassium hydroxide: 0.2 parts by weight; suspending agent: 0.4 parts by weight; acetone: 0.3 parts by weight; self-made stabilization enhancer: 0.4 parts by weight;

[0056] According to the above composition ratio requirements, each raw material composition was weighed, and prepared according to the following method:

[0057] Step 1: Coordinate Fluorosilicic Acid

[0058] In order to control the production cost, this embodiment selects silica fume coordination; the silica fume used is required to be close to white, the silica content is greater than 85%, and the specific surface area is controlled at 20000m 2 / Kg; Add an appropriate amount of silica fume into the weighed fluosilicic acid and s...

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
specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention discloses a composite acetone enhanced alkali-free liquid setting accelerator. An existing alkali-free liquid setting accelerator has the main problems that unstable phenomena such as devitrification and layering can occur after the product is placed for 1-2 months, and the 1d compressive strength of most products cannot meet the standard requirement. The alkali-free liquid setting accelerator comprises the components: fluosilicic acid, aluminum hydroxide, acrylic acid, aluminum sulfate, zinc oxide, magnesium hydroxide, magnesium silicate, potassium hydroxide, a suspending agent, acetone, a stabilizing enhancer and tap water. The stabilizing enhancer comprises the components: acetone, urea, methanol or ethanol and glycerol. The alkali-free liquid setting accelerator is simple to produce, non-toxic and pollution-free, the product does not crystallize after being placed for half a year, the placement stability of the alkali-free liquid setting accelerator product is ensured through a multi-component composite superimposed effect, the expressive force of site construction is improved, the rebound rate is reduced, the 1 d compressive strength is improved, and it is ensured that the later strength does not shrink.

Description

technical field [0001] The invention belongs to the technical field of building materials for support engineering, and in particular relates to a composite acetone-enhanced non-alkali liquid quick-setting agent. Background technique [0002] Accelerators can be divided into alkaline accelerators and non-alkali accelerators according to the alkali content. It is one of the important measures to accelerate the setting and hardening speed of shotcrete so as to provide support capacity in time and ensure structural safety; it is widely used in underground Engineering, mining engineering and various support engineering fields. Alkaline quick-setting agent has high alkali content and strong corrosiveness, which is easy to cause damage to the respiratory system, eyes, skin, etc. of construction workers, and the introduction of a large amount of alkali metal into concrete will also cause the strength of concrete to decrease later, and the potential alkali-aggregate reaction The lik...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/04C04B103/12
CPCC04B40/0039C04B2103/12C04B22/126C04B22/06C04B24/04C04B22/148C04B22/066C04B22/00C04B22/062C04B24/008C04B2103/0082C04B2103/0068
Inventor 魏莹王永安郑复鹏张超
Owner CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP
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