STRESS-STRAIN RELATIONSHIP OF FIBRE REINFORCED CONCRETE EXPOSED UNDER ELEVATED TEMPERATURES

Aminuddin Jameran, Izni Syahrizal Ibrahim

Abstract


A research had been done to study the stress-strain relationship of fibre reinforced concrete (FRC) exposed under elevated temperature. The FRC used were single fibre concrete and hybrid fibre concrete which is combination of two different properties of fibres i.e. steel (SF) and polypropylene (PPF) by applying fibres volume fraction at 1.5%. At the same time, the fibres proportion of steel-to-polypropylene ranged in the following percentages: (100-0), (75-25), (50-50), (25-75) and (0-100). Cylinder samples of 150 mm diameter  300 mm high were used and subjected to a compressive load to determine the relationship. All samples were casted and then water cured for 28 days before exposing them to the desired temperature i.e. 200C, 400C, 600C and 800C for 1 hour. For the control specimens, the cylinders were left at room temperature (27C) until the test day. Before placing the cylinders into the compression testing machine, they were left to cool naturally. All test results were tabulated and the stress-strain relationships were compared between the variations of the elevated exposure temperature. The findings show that the addition of fibres only improve the Elastic Modulus of concrete at room temperatures (27C), but when exposed under elevated temperatures, the Elastic Modulus decreased especially above 400. High temperatures

Keywords


Fibre reinforced concrete, elevated temperature, stress-strain relationship, elastic modulus.

Full Text:

PDF

References


BS EN 12390-13. Testing hardened concrete - Part 13: Determination of secant modulus of elasticity in compression. 1-10.

Chang, Y.F. et al., 2006. Residual stress – strain relationship for concrete after exposure to high temperatures.Cement and Concrete Research, 36, pp.1999–2005.

Cheng, F., Kodur, V.K.R. & Wang, T., 2004. Stress-Strain Curves for High Strength Concrete at Elevated Temperatures. Journal of Materials in Civil Engineering, (February), pp.84–90.

Ibrahim I.S., Othman F.A., Ghazali M.I. & Jameran A. (2013)." The Mechanical Properties of Hybrid Fibre Reinforced Composite Concrete". Proceedings of the 13th East Asia-Pacific Conference on Structural Engineering and Construction.11-13 September. Sapporo, Japan: University of Hokkaido.

Kalifa, P., Chéné, G. & Gallé, C., 2001. High-temperature behaviour of HPC with polypropylene fibres - From spalling to microstructure. Cement and Concrete Research, 31(10), pp.1487–1499.

Kong, D.L.Y. & Sanjayan, J.G., 2010. Effect of elevated temperatures on geopolymer paste, mortar and concrete. Cement and Concrete Research, 40(2), pp.334–339.

Lau, A. & Anson, M., 2006. Effect of high temperatures on high performance steel fibre reinforced concrete. Cement and Concrete Research, 36(9), pp.1698–1707.

Rao, K.S. et al., 2013. Comparison of Performance of Standard Concrete And Fibre Reinforced Standard Concrete Exposed To Elevated Temperatures. American Journal of Engineering Research, (03), pp.20–26.

Sukontasukkul, P., Pomchiengpin, W. & Songpiriyakij, S., 2010. Post-crack (or post-peak) flexural response and toughness of fiber reinforced concrete after exposure to high temperature. Construction and Building Materials, 24(10), pp.1967–1974.




DOI: https://doi.org/10.11113/mjce.v29.146

Refbacks

  • There are currently no refbacks.


Copyright © 2018 Penerbit UTM Press, Universiti Teknologi Malaysia.
Disclaimer : This website has been updated to the best of our knowledge to be accurate. However, Universiti Teknologi Malaysia shall not be liable for any loss or damage caused by the usage of any information obtained from this web site.
Best viewed: Mozilla Firefox 4.0 & Google Chrome at 1024 × 768 resolution.