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Thermal insulation fire-proof aggregate with polystyrene particle-coated expanded and vitrified bead mortar and preparation method thereof

A technology of expanded vitrified microbeads and polystyrene particles, which is applied in the field of wall insulation materials, can solve the problems of low cement gel strength, low thermal conductivity, low strength, etc., and achieves superior thermal insulation performance, high fire rating, and thermal conductivity. low effect

Inactive Publication Date: 2011-08-31
BEIJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Polyphenylene particles are organic materials with good sphericity, low water absorption, small thermal conductivity [generally less than 0.041W / (m K)], excellent thermal insulation performance, and a bulk density of about 1 / 10 of vitrified microbeads, but Poor particle gradation, large porosity, low gelling strength with cement, poor high temperature resistance and aging resistance
The disadvantages of polystyrene particles are poor heat resistance, bonding performance, low strength, and easy shell cracking

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0015] First prepare the modified material, the mass ratio of redispersible polymer latex and EPS particles in the modified material is 0.7, the mass ratio of the cementitious material wrapped in the outer layer (the mass ratio of cement to fly ash is 6) and EPS particles is 0.1. Secondly, after the metered redispersible polymer latex is prepared according to the water-to-binder ratio of 0.6, it is sprayed on the surface of the constantly turning EPS particles. A certain amount of cement and fly ash are wrapped with a layer of inorganic cementitious material to make the surface of EPS particles inorganic, with a particle size of 0.4-0.7cm. Third, according to this ratio (wt%): 42.5 grade cement 24.8, vitrified microbeads 12.4, quartz sand 24.8, wood fiber 1, hydroxypropyl methylcellulose 1, redispersible rubber powder 2.5, polypropylene short fiber 0.5, β hemihydrate gypsum 1, foaming agent 1, water 31, and then add calcium hydroxide of 1% by mass of the above dry mixture to ...

example 2

[0017] First prepare the modified material, the mass ratio of redispersible polymer latex and EPS particles in the modified material is 0.9, the mass ratio of the cementitious material wrapped in the outer layer (the mass ratio of cement to fly ash is 8) and EPS particles is 0.2. Secondly, after the metered redispersible polymer latex is prepared according to the water-to-binder ratio of 0.77, it is sprayed on the surface of the constantly turning EPS particles. A certain amount of cement and fly ash are wrapped with a layer of inorganic cementitious material to make the surface of EPS particles inorganic, with a particle size of 0.4-0.7cm. Third, according to this ratio (wt%): 42.5 grade cement 33, vitrified microbead 9, quartz sand 23, wood fiber 0.1, hydroxypropyl methylcellulose 0.1, redispersible rubber powder 1.5, polypropylene short fiber 0.1, β hemihydrate gypsum 0.4, foaming agent 0.3, water 32.5, and then add calcium hydroxide of 5% by weight of the above dry mixtur...

example 3

[0019] First prepare the modified material, the mass ratio of redispersible polymer latex and EPS particles in the modified material is 0.8, the mass ratio of the cementitious material wrapped in the outer layer (the mass ratio of cement to fly ash is 7) and EPS particles is 0.15. Secondly, after the metered redispersible polymer latex is prepared according to the water-to-binder ratio of 0.9, it is sprayed on the surface of the constantly turning EPS particles. A certain amount of cement and fly ash are wrapped with a layer of inorganic cementitious material to make the surface of EPS particles inorganic, with a particle size of 0.4-0.7cm. Third, according to this ratio (wt%): 42.5 grade cement 30, vitrified microbeads 10, quartz sand 24, wood fiber 0.5, hydroxypropyl methylcellulose 0.5, redispersible rubber powder 2, polypropylene short fiber 0.5, β hemihydrate gypsum 0.6, foaming agent 0.4, water 31.5, and then add calcium hydroxide of 4% by weight of the above dry mixtur...

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PUM

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Abstract

The invention discloses a thermal insulation fire-proof aggregate with polystyrene particle-coated expanded and vitrified bead mortar and a preparation method thereof, and belongs to the field of wall insulation materials. The aggregate consists of a core layer and a coating layer, wherein the core layer is made of surface-modified polystyrene particles; the coating layer is made of expanded and vitrified bead thermal insulation mortar; and the thermal insulation mortar is added with calcium hydroxide, and the calcium hydroxide is heated and decomposed to absorb heat and release water so as to achieve the flame-retardant effect. The preparation method comprises the following steps of: screening the polystyrene particles, performing inorganic modification on the surfaces of the polystyreneparticles, and ensuring that the particle size of the modified polystyrene particles is 0.4-0.7cm; preparing expanded and vitrified bead thermal insulation mortar slurry in a ratio; and coating the surface-modified polystyrene particles by using the expanded and vitrified bead thermal insulation mortar slurry, and drying under natural condition to obtain the aggregate particles with the particle size of 0.7-1.5cm. The aggregate has the characteristics of high thermal insulation and fire-proof property, and has the characteristic of simple operation in the fire-proof thermal insulation application.

Description

technical field [0001] The invention belongs to the field of thermal insulation materials for walls, and relates to a thermal insulation and fireproof aggregate in which expanded vitrified microbead mortar wraps polyphenylene particles and a preparation method thereof. Background technique [0002] Expanded vitrified microbeads are a kind of inorganic lightweight granular material monomer with good thermal insulation performance developed in recent years. Its internal porous cavity, surface vitrified closed, smooth luster, stable physical and chemical properties, light weight, It has excellent properties such as heat insulation, fire prevention, high and low temperature resistance, anti-aging, and low water absorption. It is an environmentally friendly high-performance thermal insulation material. [0003] Polyphenylene particles are organic materials with good sphericity, low water absorption, small thermal conductivity [generally less than 0.041W / (m K)], excellent thermal ...

Claims

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Application Information

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IPC IPC(8): C04B14/02C04B16/08C04B20/10C04B28/04
CPCC04B20/12C04B28/02Y02W30/91C04B16/08C04B20/1029C04B20/1055C04B20/1077C04B20/1007C04B20/1014C04B20/1048C04B20/1066C04B20/107C04B20/1074C04B14/06C04B14/24C04B16/0633C04B18/26C04B20/0048C04B22/064C04B22/143C04B24/383C04B38/10C04B2103/0057
Inventor 严建华秦魏刘伟华张红芳罗淑湘刘妍王倩倩张海滨
Owner BEIJING UNIV OF TECH
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