Fire Performance and Thermal Insulation of Reinforced Lightweight Aggregate Concrete

Abstract:

Structural lightweight aggregate concrete (LWAC) members have demonstrated greater fire endurance periods than equivalent thickness members made with normal-weight aggregates. Superior performance is due to a combination of lower thermal conductivity, lower coefficient of thermal expansion, and the inherent thermal stability developed by aggregates that have been exposed temperature greater than 1050°C during preprocessing. Furthermore, LWAC exhibits relatively high thermal insulating value, of which the thermal conductivity can be half as much as that of ordinary normal-weight concrete (NWC). Therefore, the main objective of this paper is to implement fire resistance testing for structural and non-structural elements made of LWAC and NWC to assess and compare their fire behavior.

• Periodical: Advanced Materials Research (Volumes 287-290)
• Pages: 1065-1069
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.287-290.1065
• Online since: July 2011
• Authors: Hsien Sheng Peng, How Ji Chen, Chao Wei Tang, Yu Ping Chen
• Keywords: Fire Resistant, Lightweight Aggregate Concrete (LWAC), Thermal Conductivity (TC)

References

[1] H.L. Malhotra: The effect of temperature on the compressive strength of concrete, Magazine of Concrete Research Vol. 8(23) (1956), pp.85-94.

DOI: 10.1680/macr.1956.8.23.85

[2] G.T.G. Mohamedbhai: Effect of exposure time and rates of heating and cooling on residual strength of heated concrete, Magazine of Concrete Research Vol. 38(136) (1986), pp.151-158.

DOI: 10.1680/macr.1986.38.136.151

[3] J.J. Jensen, T.A. Hammer, E. Opheim and P.A. Hansen: Fire resistance of lightweight aggregate concrete. In Structural lightweight aggregate concrete, in: Proc. intern. symp., Sandefjord (1995).

DOI: 10.1016/b978-081551486-2.50012-2

[4] S.Chandra and L.Berntsson: Fire resistance of lightweight aggregate concrete, Lightweight Aggregate Concrete (2002), pp.291-319.

DOI: 10.1016/b978-081551486-2.50012-2

[5] H.J. Chen, Y.W. Liu and C.W. Tang: Thermal insulation of lightweight concrete, Journal of Engineering, National Chung Hsing University Vol. 14(1) (2003), pp.1-7.