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Environment-friendly high-performance waterproof flame-retardant plastering mortar and preparation method thereof

A plastering mortar and high-performance technology, which is applied in the field of silicate building materials, can solve problems such as high production cost, collapse, and hollowing of the plaster layer on the wall, so as to reduce production costs, prevent flames from spreading, and improve work sexual effect

Inactive Publication Date: 2013-10-02
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When producing plastering mortar, most of the raw materials used are natural minerals, which makes the production cost high; in the actual construction process, often due to the failure to meet the requirements of the construction environment, the plastering mortar has poor workability, poor water retention, and low bonding strength. A series of problems such as hollowing and cracking of the wall plastering layer have seriously hindered the use of new wall materials; in addition, the exterior wall mortar is exposed to the air all year round, and is affected by rain, snow, dry and wet changes, etc. The phenomenon of collapse and shedding due to the influence of conditions is not uncommon. Therefore, this also puts forward certain requirements for the waterproof and impermeable performance of building plastering mortar; Its dosage is too low or the properties of the plastering mortar cannot meet the relevant national standards; in terms of building safety and fire prevention, although mortar is an inorganic non-combustible material, when a fire breaks out in a building, the commonly used thin plastering mortar is not effective. Prevent the spread and penetration of flames of combustible materials such as organic thermal insulation materials and joint cementing materials, so that the disaster cannot be effectively controlled, causing huge hidden dangers of property loss and casualties

Method used

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  • Environment-friendly high-performance waterproof flame-retardant plastering mortar and preparation method thereof
  • Environment-friendly high-performance waterproof flame-retardant plastering mortar and preparation method thereof
  • Environment-friendly high-performance waterproof flame-retardant plastering mortar and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Preparation of modified expandable graphite: according to the mass ratio flake graphite: KMnO 4=1:0.3 ratio to add KMnO to flake graphite 4 , stir well, add 70% HClO 3 solution, maintaining a solid-to-liquid ratio of 1:4, and keeping intermittent stirring at 35°C for 90 minutes, followed by washing with water, suction filtration, drying, and grinding until the particle size is 0.05-1mm, and the modified expandable graphite can be obtained. The expansion volume is 500~600ml / g;

[0032] 2) Preparation of modified phosphogypsum: Mix phosphogypsum, quicklime and fly ash evenly in a mass ratio of 13:5:1, dry or fry at 80°C for 3 hours, and then grind until the specific surface area is 2500 ~3500cm 2 / g to obtain modified phosphogypsum, wherein the radioactivity of phosphogypsum meets the relevant requirements of GB6566-2001;

[0033] 3) Preparation of plastering mortar: P.O42.5R cement, modified phosphogypsum, redispersible latex powder, limestone powder, ceramic micr...

Embodiment 2

[0037] 1) Preparation of modified expandable graphite: according to the mass ratio flake graphite: KMnO 4 =1:0.4 ratio to add KMnO to flake graphite 4 , stir well, add 75% HClO 3 Solution, maintain a solid-liquid ratio of 1:4, keep at 35°C for 80 minutes with intermittent stirring, then wash with water, filter with suction, dry, and grind until the particle size is 0.05-1mm to obtain modified expandable graphite with an expansion volume of 500 ~600ml / g;

[0038] 2) Preparation of modified phosphogypsum: Mix phosphogypsum, lime and fly ash evenly at a mass ratio of 12:5:1, dry or fry at 80°C for 2.5 hours, and then grind until the specific surface area is 2500~3500cm 2 / g to obtain modified phosphogypsum, wherein the radioactivity of phosphogypsum meets the relevant requirements of GB6566-2001;

[0039] 3) Preparation of plastering mortar: P.O42.5R cement, modified phosphogypsum, redispersible latex powder, limestone powder, ceramic microbeads, modified expandable graphite,...

Embodiment 3

[0042] 1) Preparation of modified expandable graphite: Use flake graphite, hydrogen peroxide, and fuming nitric acid to stir rapidly in an ice-water bath until the reaction becomes gentle. ≥99.5% acetic acid solution with constant stirring, react for 60min, wash with water, filter with suction, and dry to obtain sulfur-free and ash-free modified expandable graphite with an expansion volume of 300-350ml / g, of which flake graphite, fuming nitric acid, hydrogen peroxide , the ratio of acetic acid is 5 (g): 12 (ml): 1 (ml): 5 (ml);

[0043] 2) Preparation of modified phosphogypsum: Mix phosphogypsum, lime and fly ash uniformly at a mass ratio of 13:5:1, dry or fry at 80°C for 3 hours, and then grind until the specific surface area is 2500 ~3500cm 2 / g to obtain modified phosphogypsum, wherein the radioactivity of phosphogypsum meets the relevant requirements of GB6566-2001;

[0044] 3) Preparation of plastering mortar: P.O42.5R cement, modified phosphogypsum, redispersible latex...

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Abstract

The invention relates to environment-friendly high-performance waterproof flame-retardant plastering mortar, which is prepared by mixing the following components of: P.O42.5R cement, modified phosphogypsum, redispersible latex powder, limestone powder, ceramic microspheres, modified expandable graphite, a water-retaining agent, a toughening agent and a water repellent in a mass ratio of (1-2):(0.4-0.9):(0.1-0.4):(0.1-0.5):(0.5-1):(0.25-1.5):(0.005-0.04):(0.005-0.01):(0.005-0.03). The environment-friendly high-performance waterproof flame-retardant plastering mortar has a great significance for high-efficiency flame retardance, heat insulation, water prevention, permeation resistance, composite heat preservation, energy conservation, the recycling of the phosphogypsum and the reduction in the pollution of solid wastes to environment, and has the advantages of low cost and high strength.

Description

technical field [0001] The invention belongs to the field of silicate building materials, and specifically relates to an environment-friendly high-performance waterproof and flame-retardant plastering mortar prepared by using high-efficiency expansion type flame retardant and phosphogypsum, which is used for interior and exterior walls of construction and decoration projects, Cover plaster. Background technique [0002] Plastering mortar has a construction area of ​​3-5m2 per square meter in general civil buildings. 2 The inner surface is plastered, with a thickness of 0.15-0.75m 2 The exterior is plastered. When producing plastering mortar, most of the raw materials used are natural minerals, which makes the production cost high; in the actual construction process, often due to the failure to meet the requirements of the construction environment, the plastering mortar has poor workability, poor water retention, and low bonding strength. A series of problems such as hollo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00
Inventor 黄健宋雪峰马保国陈嘉懿蹇守卫赵子强殷海波段超群
Owner WUHAN UNIV OF TECH
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