Unlock instant, AI-driven research and patent intelligence for your innovation.

High-activity anhydrous ardealite cementing material and preparation method therefor

A technology of cementitious material and phosphogypsum, applied in the field of building materials, can solve the problems of slow hydration and hardening speed of anhydrous phosphogypsum, low early strength, low utilization rate, etc., and achieves high early strength, high utilization rate, and reduced production. cost effect

Active Publication Date: 2019-12-31
HUBEI UNIV OF TECH
View PDF5 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a highly active anhydrous phosphogypsum cementitious material and its preparation method for the problems of slow hydration and hardening speed, low early strength and low utilization rate of anhydrous phosphogypsum. , low cost, the resulting product has good performance, realizes energy saving and environmental protection, and treats waste with waste

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
  • High-activity anhydrous ardealite cementing material and preparation method therefor
  • High-activity anhydrous ardealite cementing material and preparation method therefor
  • High-activity anhydrous ardealite cementing material and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The preparation method of high activity anhydrous phosphogypsum cementing material 1 includes the following steps:

[0041] 1) The alkaline industrial solid waste of calcium carbide slag (dissolved in water, pH value greater than 13) is crushed in a crusher. After crushing to 2-20mm, it is placed in a ball mill for dry grinding until it is 0.075mm square hole sieve; obtained alkaline stimulant;

[0042] 2) Weigh out 85 parts of anhydrous phosphogypsum, 4 parts of alkaline activator, 7 parts of potassium sulfate, 0.4 parts of polycarboxylic acid-based high-performance water reducing agent according to the weight ratio, and the amount of water used is no 0.3 of the weight of hydrophosphogypsum;

[0043] 3) Add anhydrous phosphogypsum, alkaline activator, and sulfate into a mixer to mix the materials evenly, then add water and add water reducing agent at the same time, and stir until evenly dispersed to obtain anhydrous gypsum cementing material 1; Keep it indoors at room tempe...

Embodiment 2

[0045] The preparation method of high activity anhydrous phosphogypsum cementing material 2 includes the following steps:

[0046] 1) The alkaline industrial solid waste (dissolved in water, pH value greater than 13) of the white mud is crushed in a crusher. After crushing to 2-20mm, it is placed in a ball mill for dry grinding until it passes 0.075mm square hole sieve; obtained alkaline stimulant;

[0047] 2) Weigh 95 parts of anhydrous phosphogypsum, 10 parts of alkaline activator, 1 part of sodium sulfate, 0.15 parts of polycarboxylate high-performance water reducing agent according to the weight ratio, and the amount of water is no 0.5 of the weight of hydrophosphogypsum;

[0048] 3) Add anhydrous phosphogypsum, alkaline activator, and sulfate into a mixer to mix to make the materials uniformly dispersed, then add water and at the same time add water reducing agent, stir until evenly dispersed, to obtain anhydrous gypsum cementing material 2; Keep it indoors at room temperature...

Embodiment 3

[0050] The preparation method of high activity anhydrous phosphogypsum cementing material 3 includes the following steps:

[0051] 1) The alkaline industrial solid waste of calcium carbide slag (dissolved in water, pH value greater than 13) is crushed in a crusher. After crushing to 2-20 mm, it is placed in a ball mill for dry grinding until it is over 0.075mm square hole sieve; obtained alkaline stimulant;

[0052] 2) Weigh 90 parts of anhydrous phosphogypsum, 7 parts of alkaline activator, 4 parts of potassium sulfate, 0.24 parts of polycarboxylate high-performance water-reducing agent according to the weight ratio, and the amount of water used is no 0.4 of the weight of hydrophosphogypsum;

[0053] 3) Add anhydrous phosphogypsum, alkaline activator, and sulfate into a mixer to mix to make the materials uniformly dispersed, then add water and at the same time add water-reducing agent, stir until evenly dispersed, to obtain anhydrous gypsum cementing material 3. Keep it indoors at...

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
Initial setting timeaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a high-activity anhydrous ardealite cementing material and a preparation method therefor. The high-activity anhydrous ardealite cementing material comprises 75-95 parts of anhydrous ardealite, 4-20 parts of alkaline excitant, 1-10 parts of sulfate and 0.15-0.95 part of water reducer. The method comprises the steps of adding the anhydrous ardealite, the alkaline excitant andthe sulfate into a stirrer, carrying out mixing to uniformly disperse the materials, then, adding water, meanwhile, adding the water reducer, and carrying out stirring until the materials are uniformly dispersed, thereby obtaining the anhydrous ardealite cementing material. According to the high-activity anhydrous ardealite cementing material and the preparation method therefor, the utilization ratio of wastes is high, the pollution problem caused by industrial solid wastes such as carbide slag and white clay can be abated, and by extensively using industrial alkaline solid wastes, a remarkable environmental benefit is achieved while the production cost is reduced.

Description

Technical field [0001] The invention relates to the technical field of building materials, in particular to a high-activity anhydrous phosphogypsum cementing material and a preparation method thereof. Background technique [0002] Phosphogypsum is an industrial by-product in the production of phosphoric acid by wet process. Its main component is calcium sulfate dihydrate, with a content of about 90%. Due to the influence of the preparation process, phosphogypsum is strongly acidic (pH<3), and contains phosphorus, fluorine, organic matter and some radioactive elements. The existence of impurities and radioactive elements in phosphogypsum, and the instability of the nature due to different phosphate rocks restrict the comprehensive utilization of phosphogypsum. As a result, phosphogypsum is mainly handled in open-air storage, which not only takes up a lot of land and wastes resources, but also In addition, harmful impurities are leached with rainwater, producing acidic wastewat...

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): C04B11/26
CPCC04B11/26
Inventor 苏英熊国庆谢云轩贺行洋陈顺杨进陈威黄震宇刘巧付健健徐焰
Owner HUBEI UNIV OF TECH