CASH mineral suitable for improving volume stability of alkali-activated slag system and preparation method thereof

A technology of volume stability and alkali excitation, which is applied in the direction of aluminum silicate and silicate, can solve the problems of high preparation environment requirements and complicated preparation steps, and achieve the effect of simple preparation process, simple preparation method and reduced porosity

Inactive Publication Date: 2018-08-28
NANJING UNIV OF TECH
View PDF3 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The synthesis method with organic matter as the carrier has compl

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
  • CASH mineral suitable for improving volume stability of alkali-activated slag system and preparation method thereof
  • CASH mineral suitable for improving volume stability of alkali-activated slag system and preparation method thereof
  • CASH mineral suitable for improving volume stability of alkali-activated slag system and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Using nano-alumina, nano-silicon dioxide, calcium hydroxide, and deionized water as raw materials, the calcium-silicon ratio is 0.5, the silicon-aluminum ratio is 2.0, the water-solid ratio is 1, the reaction temperature is 60°C, and the reaction time is 90 minutes. 3d age. The mass ratios of the raw materials are respectively: 32g of calcium hydroxide, 22.1g of nano-alumina, 25.9g of nano-silicon dioxide, and 640g of deionized water. Prepare according to the steps described in the summary of the invention to obtain the product (referred to as CASH). The mass ratio of slag powder to standard sand (mortar ratio) is 1:3, and the dosage of activator water glass with a modulus of 1.8 is Na 2 O equivalent (accounting for 5% of the mass of cementitious slag powder), without adding CASH, using 0.5 water (including the water introduced by water glass) to prepare mortar, without adding CASH, forming and curing, and measuring dryness of different ages Shrinkage, dry shrinkage t...

Embodiment 2

[0036] Using nano-alumina, nano-silicon dioxide, calcium hydroxide, and deionized water as raw materials, the calcium-silicon ratio is 0.5, the silicon-aluminum ratio is 2.0, the water-solid ratio is 1, the reaction temperature is 60°C, and the reaction time is 90 minutes. 3d age. The mass ratios of the raw materials are respectively: 32g of calcium hydroxide, 22.1g of nano-alumina, 25.9g of nano-silicon dioxide, and 640g of deionized water. Prepare according to the steps described in the summary of the invention to obtain the product (referred to as CASH). The mass ratio of slag powder to standard sand (mortar ratio) is 1:3, and the dosage of activator water glass with a modulus of 1.8 is Na 2O equivalent (accounting for 5% of the mass of cementitious material slag powder, i.e. the amount of alkali), mixed with 4.5g CASH (according to 1% of the mass fraction of slag), made it graded and dry mixed with slag, using 0.5% water (including the introduction of water glass) Prepar...

Embodiment 3

[0038] Using nano-alumina, nano-silicon dioxide, calcium hydroxide, and deionized water as raw materials, the calcium-silicon ratio is 0.5, the silicon-aluminum ratio is 2.0, the water-solid ratio is 1, the reaction temperature is 60°C, and the reaction time is 90 minutes. 3d age. The mass ratios of the raw materials are respectively: 32g of calcium hydroxide, 22.1g of nano-alumina, 25.9g of nano-silicon dioxide, and 640g of deionized water. Prepare according to the steps described in the summary of the invention to obtain the product (referred to as CASH). The mass ratio of slag powder to standard sand (mortar ratio) is 1:3, and the dosage of activator water glass with a modulus of 1.8 is Na 2 O equivalent (accounting for 5% of the mass of cementitious material slag powder, i.e. the amount of alkali), mixed with 13.5g CASH (3% according to the mass fraction of slag), made it graded and dry mixed with slag, using 0.5% water (including the introduction of water glass) Prepare...

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

No PUM Login to view more

Abstract

The invention discloses a CASH mineral suitable for improving the volume stability of an alkali-activated slag system and a preparation method thereof. The prepared mineral can promote the hydration of alkali-activated slags and shorten the alkali-activated setting time. The preparation method comprises the following steps that (1), a calcareous material, an aluminum material, a siliceous materialand deionized water are accurately weighed, the aluminum material and the siliceous material are mixed with the deionized water in sequence and then dispersed, and then the calcareous material is added to obtain a mixture; (2), the mixture obtained in step (1) is heated in a water bath and stirred for reaction; (3), after the reaction is completed, the mixture is sealed in a polytetrafluoroethylene container, placed in a water bath and solidified to the age of 3-7 days. (4), after the solidification is completed, a product obtained in step (3) is washed with absolute ethanol and distilled water and then filtered for twice or more; (5), a product obtained in step (4) is dried in a vacuum drying oven until constant weight to obtain the CASH mineral.

Description

technical field [0001] The invention relates to a CASH mineral and a preparation method thereof, more specifically to a CASH mineral suitable for improving the volume stability of an alkali-induced slag system and a preparation method thereof. Background technique [0002] Alkali-activated cementitious material is a new low-carbon building material. It uses industrial solid waste (fly ash, slag, steel slag, etc.) It has the advantages of simple process, no firing, low cost, low energy consumption, CO 2 Less emissions, compared with traditional cement, CO in the production process 2 The emissions can be reduced by 50% to 80%. At the same time, it also has many excellent properties such as high strength, good corrosion resistance and fire resistance, and can seal radioactive or toxic metal ions. [0003] High-strength alkali slag cement or hydraulic cementitious material can be prepared by mixing finely ground alkali slag powder with an appropriate alkaline activator, but th...

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): C01B33/26C04B22/08
CPCC01B33/26C04B22/08
Inventor 刘宝杨敬斌其他发明人请求不公开姓名
Owner NANJING UNIV OF TECH
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