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High-strength lightweight mixed material for fabricated hollow mould box and preparation method of high-strength lightweight mixed material

A technology of mixing materials and hollow molds, which is applied in the field of building materials, can solve the problems that the weight of the raw materials of the hollow mold box, the flame retardant performance and the sound insulation performance cannot meet the requirements of building use, and the strength of the finished hollow mold box cannot meet the requirements. The diameter and wall thickness are controllable, the structure is novel, and the thermal conductivity is small.

Active Publication Date: 2019-01-04
NANCHANG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ubiquitous problem is the selection and production of hollow mold box materials
[0003] Nowadays, researchers of materials for assembled hollow mold boxes are too pursuing to improve the thermal insulation performance of the material itself, resulting in the strength of the finished hollow mold box not meeting the requirements, and when the research focus is on the direction of increasing strength, the raw material of the hollow mold box itself The weight, flame retardancy and sound insulation performance of later use cannot meet the requirements of various buildings, which leads to the limitation of the use of hollow mold boxes
Nowadays, there is no report that a composite material for assembled hollow mold box with superior performance in all aspects has surfaced on the market.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) The particle size is 10 microns and the density is 0.125g / cm 3 Put the hollow glass microspheres into the coating machine, and wrap the hollow glass microspheres with EVA coating. The EVA coating is ethylene-vinyl acetate copolymer with a molecular weight of 2000. The thickness of the layer is 3.5mm;

[0022] (2) Prepare the raw materials of polymer mortar according to the following formula: 14 parts of bentonite, 12 parts of coal gangue, 8 parts of polyurethane with a molecular weight of 70000, 1 part of coal water slurry dispersant, 10 parts of fly ash, 15 parts of quartz sand, carboxylate 4 parts of sodium methylcellulose, 3 parts of cement. Stir the polyurethane and coal-water slurry dispersant at 50°C for 30 minutes, adjust the temperature to 45°C, then add sodium carboxymethyl cellulose, stir for 3 hours, then add bentonite, coal gangue, and fly ash to the mixture, and stir for 30 minutes , to obtain a polymer mixture, then add the polymer mixture to the mix...

Embodiment 2

[0028] (1) The particle size is 250 microns, the density is 0.6g / cm 3 Put the hollow glass microspheres into the coating machine, and wrap the hollow glass microspheres with EVA coating. The EVA coating is ethylene-vinyl acetate copolymer with a molecular weight of 2000. The thickness of the layer is 3.5mm;

[0029] (2) Prepare the raw materials of polymer mortar according to the following formula: 26 parts of bentonite, 20 parts of coal gangue, 16 parts of polyurethane with a molecular weight of 80000, 3 parts of coal water slurry dispersant, 20 parts of fly ash, 25 parts of quartz sand, carboxylate 6 parts of sodium methylcellulose, 5 parts of cement. Stir the polyurethane and coal-water slurry dispersant at 150°C for 30 minutes, adjust the temperature to 48°C, then add sodium carboxymethyl cellulose, stir for 4 hours, then add bentonite, coal gangue, and fly ash to the mixture, and stir for 50 minutes , to obtain a polymer mixture, then add the polymer mixture to the mixt...

Embodiment 3

[0035] (1) The particle size is 100 microns and the density is 0.35g / cm 3 Put the hollow glass microspheres into the coating machine, and wrap the hollow glass microspheres with EVA coating. The EVA coating is ethylene-vinyl acetate copolymer with a molecular weight of 2000. The thickness of the layer is 3.5mm;

[0036] (2) Prepare the raw materials of polymer mortar according to the following formula: 20 parts of bentonite, 18 parts of coal gangue, 12 parts of polyurethane with a molecular weight of 75000, 2 parts of coal water slurry dispersant, 15 parts of fly ash, 20 parts of quartz sand, carboxylate 5 parts of sodium methylcellulose, 4 parts of cement. Stir the polyurethane and coal-water slurry dispersant at 100°C for 30 minutes, adjust the temperature to 46°C, then add sodium carboxymethyl cellulose, stir for 3 hours, then add bentonite, coal gangue, and fly ash to the mixture, and stir for 40 minutes , to obtain a polymer mixture, then add the polymer mixture to the ...

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Abstract

The invention relates to the technical field of construction materials, in particular to a high-strength lightweight mixed material for a fabricated hollow mould box. The high-strength lightweight mixed material comprises a hollow glass bead center layer, a polymer mortar layer and a modified rigid polyurethane foam layer. The modified rigid polyurethane foam layer is positioned outside the polymer mortar layer which is positioned outside the hollow glass bead center layer, and the particle size of hollow glass beads is 10-250micron while the density is 0.125-0.6g / cm<3>. The high-strength lightweight mixed material is novel in structure, weight of the fabricated hollow mould box made from the mixed material is 300-400kg / m<3>, and plasticity, flame retardation, specific strength, soundproofperformance, heat insulation performance, humidity resistance and structural stability are greatly improved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a high-strength and light-weight mixed material for an assembled hollow mold box and a preparation method thereof. Background technique [0002] In recent years, the government has vigorously advocated environmental protection, resource-saving new technologies and new materials, and in the field of building materials technology, it advocates energy-saving, land-saving and environment-friendly houses. As an important part of the construction industry, the floor not only bears various loads during the use of the building, but also bears the self-weight of the structure. If the self-weight of the floor can be reduced on the premise of ensuring the safety and reliability of the floor, it will greatly Reduce the construction cost of the structure and improve the overall economic benefits. In this context, the use of solid concrete in the construction industry has no advant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B38/08C04B20/10C08L61/14C08L75/04C08L89/00C08L9/02C08K7/24C04B14/24C04B111/40C04B111/52
CPCC04B20/1033C04B28/00C04B2111/40C04B2111/52C04B2201/32C04B2201/52C08L61/14C08L2201/02C08L2205/035C08L75/04C08L89/00C08L9/02C08K7/24C04B14/104C04B18/12C04B24/282C04B18/08C04B14/06C04B24/383C04B2103/408C04B14/24
Inventor 谢帮华
Owner NANCHANG INST OF TECH