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Research on non-steam-cured and non-fired fly-ash thermal insulating materials

Authors
Journal
Journal of China University of Mining and Technology
1006-1266
Publisher
Elsevier
Publication Date
Volume
18
Issue
1
Identifiers
DOI: 10.1016/s1006-1266(08)60025-5
Keywords
  • Fly-Ash
  • Thermal Insulating Materials
  • Non-Steam Curing
  • Non-Fsintering
  • Water Resistance

Abstract

Abstract A thermal insulating material is synthesized via a non-steam-cured and non-fired route by using fly-ash, sorel cement and hydrogen peroxide solution as raw material. Properties such as apparent density, compressive strength, bending strength, thermal conductivity, water resistance, and thermal tolerance of this matrial are studied, some influencing factors on its performance discussed. This material has an apparent density of 360 kg/m 3, a compressive strength of 1.86 MPa, a thermal conduction coefficient of 0.072 W/(m·K), a softening coefficient of 0.55, and a thermal tolerant temperature of 300 °C. Test results show that this material is light in weight, of high strength, and good thermal insulation. In addition, neither steam-curing nor sintering is needed in producing it. Further more, large amount of fly ash is used in this material, making it a low cost and environment-friendly building material.

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