Superplasticizer composition for alkali slag cement and using method thereof

A high-efficiency water reducer and alkali slag cement technology, which is applied in the field of engineering materials, can solve the problems of high viscosity of alkali slag cement slurry and the failure efficiency of water reducer, so as to reduce surface energy, increase electrostatic repulsion and steric resistance , The effect of reducing the yield stress

Active Publication Date: 2020-11-06
CHONGQING UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The activators of alkali slag cement include water glass, sodium hydroxide, sodium carbonate, sodium sulfate, etc. Among them, the quality of alkali slag cement concrete excited by water glass is the most stable, but the viscosity of alkali slag cement slurry excited by water glass is large, which leads to the traditional The superplasticizer is ineffective or has extremely low efficiency in this system

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Preparation of alkali slag cement slurry

[0018] 80 parts of water-quenched granulated blast furnace slag powder, 20 parts of particle size is 400 mesh, density is 3.05g / cm 3 Borocyclic silicate minerals and 2 parts of powdered β-naphthalenesulfonate sodium formaldehyde condensate with a particle size of 0.07mm are mixed evenly, poured into a mixer and stirred for 10s, and then mixed with 12.5 parts of water glass and 30 parts of water After uniformity, use sodium hydroxide to adjust to a modulus of 1.2, pour it into a blender, and continue stirring for 240 seconds.

Embodiment 2

[0020] Preparation of alkali slag cement slurry

[0021] Take 85 parts of water-quenched granulated blast furnace slag powder and 10 parts with a particle size of 400 mesh and a density of 3.05g / cm 3 The borocyclic silicate minerals are mixed evenly, then poured into the mixer and stirred for 10s, then mixed 8 parts of water glass with 30 parts of water, adjusted to a modulus of 1.2 with sodium hydroxide, and then added 1 part of sodium sulfate to a content of 0.8 Wt% liquid β-naphthalenesulfonate sodium formaldehyde condensate, mixed evenly, poured into the mixer, and continued to stir for 240s.

Embodiment 3

[0023] Preparation of alkali slag concrete

[0024] Take 90 parts of water-quenched granulated blast furnace slag powder and 15 parts with a particle size of 450 mesh and a density of 3.15g / cm 3 The borocyclic silicate minerals are mixed evenly and then poured into the mixer and stirred for 10s, then mixed with 15 parts of water glass and 45 parts of water, adjusted to a modulus of 1.2 with sodium hydroxide, and then added 3 parts of sodium sulfate to a content of 0.8 Wt% liquid β-naphthalenesulfonate sodium formaldehyde condensate, mixed evenly, poured into a blender, stirred for 20s, added 180 parts of medium sand and 270 parts of stones, continued to stir for 240s.

[0025] In embodiment 1-3, the specific surface area of ​​the water-quenched granulated blast furnace slag powder used is 350m 2 / kg, the density is 2.72g / cm 3 , the alkalinity coefficient is 1.03, the activity coefficient is 0.43, by mass percentage, including the following components, SiO 2 : 32.70%, Al 2 ...

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
particle size (mesh)aaaaaaaaaa
densityaaaaaaaaaa
densityaaaaaaaaaa
Login to view more

Abstract

The invention relates to an efficient water reducer composition for alkali-activated slag cement and a using method of the efficient water reducer composition, and belongs to the technical field of engineering materials. The efficient water reducer composition is prepared from a boron-containing cyclosilicate mineral and a naphthalene sulfonated formaldehyde condensate, wherein the boron-containing cyclosilicate mineral is high negative charge density mineral, a stable electric field can be generated in an alkali-activated slag cement system, the surface of the boron-containing cyclosilicate mineral can be loaded with high-density negative electricity, mineral particles achieve the purpose of dispersion through the electrostatic repulsion action, the naphthalene sulfonated formaldehyde condensate in the water reducer composition can not only reduce the surface energy of a system liquid phase, but also be adsorbed on the surface of the mineral through a diffusion layer of a double electrode layer on the surface of the boron-containing cyclosilicate mineral, and further increases the electrostatic repulsion and the steric hindrance among the mineral particles to further achieve the effect of releasing the free liquid phase and effectively reduce the yield stress of the alkali-activated slag cement system, and the water reducing efficiency can reach up to 10-15%.

Description

technical field [0001] The invention belongs to the technical field of engineering materials, and in particular relates to a high-efficiency water reducer composition for alkali slag cement and a use method thereof. Background technique [0002] Alkali slag cement is a green high-performance cementitious material. Since its invention, it has attracted widespread attention from many countries in the world for its excellent physical and mechanical properties, chemical corrosion resistance and excellent durability. Its development and utilization are in line with my country's energy-saving and emission-reduction development strategy. The activators of alkali slag cement include water glass, sodium hydroxide, sodium carbonate, sodium sulfate, etc. Among them, the quality of alkali slag cement concrete excited by water glass is the most stable, but the viscosity of alkali slag cement slurry excited by water glass is large, which leads to the traditional The superplasticizer is i...

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 Patents(China)
IPC IPC(8): C04B24/22C04B28/08C04B103/30
CPCC04B28/08C04B40/0039C04B2103/302C04B22/08C04B24/226C04B22/00C04B22/147C04B14/06C04B14/02
Inventor 杨长辉朱效宏陈科杨凯余林文潘群张明涛黄南菊
Owner CHONGQING UNIV
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