The Effect of Elevated Temperature on the Lightweight Aggregate Concrete

Abstract = 56 times | PDF = 22 times

##plugins.themes.bootstrap3.article.main##

Rahel Khalid Ibrahim

Abstract

The use of lightweight concrete has become widely spread in concrete structures in the last years. Fire can be considered as a destructive hazard that attack concrete structures. In this research the effect of elevated temperature on lightweight aggregate concretes is studied. For this purpose, 81 cube shaped specimens were prepared from three different lightweight aggregate concrete mixes. After moist curing periods for 3, 7 and28 days, the specimens were subjected to ambient and elevated temperatures of 450⁰C and 650⁰C for 2hrs.The weight of the specimens before and after exposure to elevated temperatures was determined and the residual strength results for the specimens were compared. The results showed that, the elevated temperature induces a decrease in strength and significant weight losses in lightweight aggregate concrete.

Keywords

Lightweight aggregate concrete, elevated temperature, compressive strength, residual strength, weight loss

References

ACI, ACI 213R-03, Guide for Structural Lightweight-Aggregate Concrete, ACI, Michigan USA, 2003, p. 38.
[2] L.B. Satish Chandra, Light Weight Aggregate Concrete Science, Technology and Applications, Noyas Publication, Norwich, USA, 2002.
[3] S.K. Duggal, Building materials, New Age International2009.
[4] G. Khoury, Compressive strength of concrete at high temperatures: a reassessment, Magazine of Concrete Research 44(161) (1992) 291-309.
[5] S. Handoo, S. Agarwal, S. Agarwal, Physicochemical, mineralogical, and morphological characteristics of concrete exposed to elevated temperatures, Cement and Concrete Research 32(7) (2002) 1009-1018.
[6] G.A. Khoury, Effect of fire on concrete and concrete structures, Progress in Structural Engineering and Materials 2(4) (2000) 429-447.
[7] A. Lau, M. Anson, Effect of high temperatures on high performance steel fibre reinforced concrete, Cement and Concrete Research 36(9) (2006) 1698-1707.
[8] A.F. Bingöl, R. Gül, Effect of elevated temperatures and cooling regimes on normal strength concrete, Fire and Materials 33(2) (2009) 79-88.
[9] A.M. Neville, Properties of Concrete, Pearson 2005.
[10] G. Ye, X. Liu, G. De Schutter, L. Taerwe, P. Vandevelde, Phase distribution and microstructural changes of self-compacting cement paste at elevated temperature, Cement and Concrete Research 37(6) (2007) 978-987.
[11] R.K. Ibrahim, R. Hamid, M.R. Taha, Strength and Microstructure of Mortar Containing Nanosilica at High Temperature, ACI Materials Journal 111(2) (2014).
[12] P. Klieger, J. Lamond, Significance of tests and properties of concrete and concrete-making materials, ASTM International1994.
[13] H. Tanyildizi, A. Coskun, The effect of high temperature on compressive strength and splitting tensile strength of structural lightweight concrete containing fly ash, Construction and building materials 22(11) (2008) 2269-2275.

##plugins.themes.bootstrap3.article.details##