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

Preparation method of cement-based inorganic polystyrene granule composite thermal insulation material

A technology of composite thermal insulation materials and polystyrene particles, which is applied in the field of thermal insulation materials, can solve the problems of large differences in surface properties, small bulk density of particles, and affecting material properties, etc., and achieve the effects of improved bonding ability, low thermal conductivity, and good fire resistance

Inactive Publication Date: 2017-09-01
TONGJI UNIV
View PDF2 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When EPS foam particles are used as lightweight aggregates in the preparation of lightweight concrete insulation materials, because the density of EPS particles is too small, and the surface properties of inorganic cementitious materials are quite different, polar inorganic cementitious materials do not wet it. Wet, the EPS particles are easy to float during the preparation process, and the EPS particles are difficult to disperse evenly in the system, which affects the performance of the material
According to literature reports, [Zhao Xiaoyan, Tian Wenling, Zhao Jidong, etc. EPS lightweight aggregate concrete preparation key technology and research progress, Concrete, 2009, 8:59-62.], adding ultrafine silica fume and other inorganic substances directly during the mixing process , to improve the compactness of the slurry after hardening, and improve the interfacial cohesion between EPS particles and cement slurry, but the surface of EPS particles is still hydrophobic, and the effect is not good
There is also literature [Zhang Tierong, Zhang Xuesong, Li Haitao. Research on improving the interfacial bonding performance of polystyrene lightweight aggregate concrete multiphase composite materials [J]. Journal of Hebei Institute of Architecture and Engineering, 2005.23 (1): 54-57.] proposed, Use PVA emulsion to modify EPS particles, so that the surface of EPS particles changes from hydrophobicity to hydrophilicity, so as to improve its binding performance with mortar, but due to the small bulk density of particles, the workability is still not well improved.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 50 parts of epoxy resin and 50 parts of steel slag were successively coated on the surface of 25 parts of EPS foam particles, and cured at 80°C for 30 minutes to obtain inorganic polyphenylene particles. Mix 212.5 parts of water and 1.95 parts of additives and stir at low speed (62±5r / min) for 10s, then at high speed (125±10r / min) for 10s, then add 300 parts of cement and stir at low speed for 25s and high speed for 15s to form a uniform slurry, then After adding 125 parts of the above-mentioned inorganic polyphenylene particles and mixing, the cement-based inorganic polyphenylene particle composite insulation material was prepared by stirring at a low speed for 20 seconds and a high speed for 75 seconds. The measured dry density of the composite insulation material is 311 kg / m 3 , the thermal conductivity is 0.0631 W / (m·k), the flexural strength is 0.47MPa, and the compressive strength is 0.57MPa.

Embodiment 2

[0017] 50 parts of epoxy resin and 50 parts of fly ash were successively coated on the surface of 25 parts of EPS foam particles, and cured at 80°C for 30 minutes to obtain inorganic polyphenylene particles. Mix 212.5 parts of water and 1.95 parts of additives and stir at low speed (62±5r / min) for 10s, then at high speed (125±10r / min) for 10s, then add 300 parts of cement and stir at low speed for 25s and high speed for 15s to form a uniform slurry, then After adding 125 parts of the above-mentioned inorganic polyphenylene particles and mixing, the cement-based inorganic polyphenylene particle composite insulation material was prepared by stirring at a low speed for 20 seconds and a high speed for 75 seconds. The measured dry density of the composite insulation material is 321 kg / m 3 , the thermal conductivity is 0.0623 W / (m·k), the flexural strength is 0.74MPa, and the compressive strength is 0.62MPa.

Embodiment 3

[0019] 50 parts of epoxy resin and 50 parts of silicon dioxide were successively coated on the surface of 25 parts of EPS foam particles, and cured at 80° C. for 30 minutes to obtain inorganic polyphenylene particles. Mix 212.5 parts of water and 1.95 parts of additives and stir at low speed (62±5r / min) for 10s, then at high speed (125±10r / min) for 10s, then add 300 parts of cement and stir at low speed for 25s and high speed for 15s to form a uniform slurry, then After adding 125 parts of the above-mentioned inorganic polyphenylene particles and mixing, the cement-based inorganic polyphenylene particle composite insulation material was prepared by stirring at a low speed for 20 seconds and a high speed for 75 seconds. The measured dry density of the composite insulation material is 285 kg / m 3 , the thermal conductivity is 0.0627 W / (m·k), the flexural strength is 0.45MPa, and the compressive strength is 0.43MPa.

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
Dry densityaaaaaaaaaa
Thermal conductivityaaaaaaaaaa
Flexural strengthaaaaaaaaaa
Login to View More

Abstract

The invention particularly relates to a cement-based inorganic polystyrene granule composite thermal insulation material and a preparation method thereof and belongs to the field of thermal insulation materials. The thermal insulation material is prepared from the following raw materials in parts by weight: 100 to 125 parts of inorganic polystyrene granules, 200 to 300 parts of cement, 1 to 2 parts of auxiliary agent and 180 to 215 parts of water. The preparation method of the thermal insulation material, disclosed by the invention, comprises the following steps: uniformly mixing surface inorganic polystyrene foaming granules with the cement, the auxiliary agent and the water, then injecting a mixture into a mold, and naturally curing at room temperature to obtain the cement-based inorganic polystyrene granule composite thermal insulation material. The composite thermal insulation material has the advantages of high cohesive force between the inorganic polystyrene granules and the cement, low density, low heat conductivity coefficient and good fireproof performance.

Description

technical field [0001] The invention relates to a preparation method of a cement-based inorganic polystyrene particle composite thermal insulation material, which belongs to the field of thermal insulation materials. Background technique [0002] Expandable polystyrene (EPS) foam has the advantages of low density, good shock resistance and low thermal conductivity, and is often used in packaging materials, thermal insulation materials, etc. When EPS foam particles are used as lightweight aggregates in the preparation of lightweight concrete insulation materials, because the density of EPS particles is too small, and the surface properties of inorganic cementitious materials are quite different, polar inorganic cementitious materials do not wet it. Wet, EPS particles are easy to float during the preparation process, and it is difficult for EPS particles to disperse evenly in the system, thus affecting the performance of the material. According to literature reports, [Zhao Xi...

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): C04B28/00C04B20/12
CPCC04B28/00C04B20/12C04B2201/20C04B2201/32C04B2201/50C04B16/08C04B2103/302C04B20/1018C04B20/1055C04B20/1066
Inventor 王正洲杨婷
Owner TONGJI UNIV