A-grade non-ignitable heat insulating material and preparation method thereof

A technology of thermal insulation material and water retention agent, applied in the field of building materials, can solve the problems of high water absorption rate, large water absorption rate, high dry density of thermal insulation mortar, and achieve the effects of high durability, improved service life and reduced production cost.

Inactive Publication Date: 2012-09-12
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, most of the vitrified microspheres produced in our country have problems of excessive bulk density and water absorption
In southern my country, the dry density of thermal insulation mortar prepared using vitrified microbeads as aggregate is generally high, which greatly affects its thermal insulation performance.
At the same time, the water absorption rate (60%-150%) of the vitrified microbead thermal insulation materials prepared at present i

Method used

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  • A-grade non-ignitable heat insulating material and preparation method thereof
  • A-grade non-ignitable heat insulating material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 1) Pretreatment of cement: first grind ordinary portland cement and sulphoaluminate cement separately to make the specific surface area 3500cm 2 / g, be 4:1 to mix homogeneously by the mass ratio of the two;

[0048] 2) Modification of vitrified microbeads: Soak the vitrified microbeads in 30% emulsified paraffin for 5 hours, and dry them in an oven at 30°C for 2 hours to obtain the modified vitrified microbeads with a bulk density of 125kg / m 3 , the particle size is 0.50~2mm, and the volume water absorption rate is 30%;

[0049] 3) Preparation of mineral micropowder: kaolin was calcined at 800°C, kept for 4 hours, and ground to a specific surface area of ​​3000cm 2 / g, the obtained metakaolin and silica fume are mixed evenly in a mass ratio of 2:1, and ground to a specific surface area of ​​3500cm 2 / g.

[0050] 4) Preparation of the activator: mix the ground sodium hydroxide and sodium silicate, adjust the dosage of sodium hydroxide so that the modulus of the sodium...

Embodiment 2

[0057] 1) Pretreatment of cement: First, grind ordinary Portland cement and sulphoaluminate cement separately to make the specific surface area 3000cm 2 / g, mixed uniformly at a mass ratio of 5:1;

[0058] 2) Modification of vitrified microbeads: Soak the vitrified microbeads in 50% emulsified paraffin for 5 hours, and dry them in an oven at 35°C for 4 hours to obtain the modified vitrified microbeads; the bulk density is 130kg / m 3 , the particle size is 0.50~2mm, and the volume water absorption rate is 29%;

[0059] 3) Preparation of mineral micropowder: kaolin is calcined at 800°C, kept for 3 hours, and ground to a specific surface area of ​​3000cm 2 / g.

[0060] The obtained metakaolin and microsilica powder are mixed evenly in a mass ratio of 3:1, and ground to a specific surface area of ​​3000 cm 2 / g.

[0061] 4) Preparation of the activator: mix the ground sodium hydroxide and sodium silicate, adjust the dosage of sodium hydroxide so that the modulus of the sodium s...

Embodiment 3

[0067] 1) Pretreatment of cement: first grind ordinary portland cement and sulphoaluminate cement separately to make the specific surface area 4000cm 2 / g, be 4:1 to mix homogeneously by the mass ratio of the two;

[0068] 2) Modification of vitrified microbeads: Soak the vitrified microbeads in 45% emulsified paraffin for 4.5 hours, and dry them in an oven at 30°C for 3 hours to obtain the modified vitrified microbeads with a bulk density of 135kg / m 3 , the particle size is 0.5mm ~ 1.5mm, and the volume water absorption rate is 30%;

[0069] 3) Preparation of mineral micropowder: kaolin is calcined at 800°C, kept for 4 hours, and ground to a specific surface area of ​​3500cm 2 / g.

[0070] The obtained metakaolin and micro-silica powder are mixed evenly in a mass ratio of 2.5:1, and ground to a specific surface area of ​​3500 cm 2 / g.

[0071] 4) Preparation of the activator: mix the ground sodium hydroxide and sodium silicate, adjust the dosage of sodium hydroxide so tha...

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Abstract

The invention relates to an A-grade non-ignitable heat insulating material and a preparation method thereof. The raw materials of the heat insulating material include, by mass, 45% to 60% of cement, 24% to 36% of modified vitrified microbead, 13% to 26% of mineral micro powder, 1% to 4% of exciting agent, 0.02% to 0.90% of early strength agent, 1% to 3% of redispersible latex powder and 0.10% to 0.30% of foaming agent. The preparation method of the heat insulating material includes the steps of preprocessing of the cement, modification of the vitrified microbead, preparation of the existing agent and the preparation of the heat insulating material. The A-grade non-ignitable heat insulating material and the preparation method thereof have the advantages of improving heat insulating performance of buildings, reducing energy consumption of the buildings and improving security of the buildings. Simultaneously, the provided heat material has the advantages of low dry density, low thermal conductivity and high strength.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a novel Class A non-combustible thermal insulation material and a preparation method thereof. Background technique [0002] my country's annual urban and rural new housing construction area is nearly 2 billion square meters, and existing buildings are nearly 42 billion square meters. Building energy consumption has accounted for more than 27% of the country's total energy consumption. Building energy conservation has become an important link in my country's sustainable development. It is the energy saving of the envelope structure that has a particularly important position. The most commonly used insulation materials, such as extruded polystyrene board (XPS) or expanded polystyrene board (EPS), despite their advantages such as low thermal conductivity and low density, as organic materials, their flammability poses a great safety hazard. In recent years, fires in "CCT...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B28/06
Inventor 马保国苏雷蹇守卫赵志广刘敏
Owner WUHAN UNIV OF TECH
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