ANALYTICAL DEPENDENCES OF STRENGTH, DEFORMATION, FORCE AND ENERGY PARAMETERS OF HIGH STRENGTH CONCRETE AT HEATING PROCESS
Abstract
The paper presents experimental results of mechanical high strength concrete (HSC) properties at high temperature. The obtained results specify an increasing of strength and destruction energy of samples at temperature from 20 °С to 300 °С. The positive influence of high temperature (up to 400 °C) on concrete mechanical properties with w/c ratio less than 0.3 has been proved in the paper. The paper has experimentally proved that usage of a mineralogical additive as «silica fume» in high strength concrete at high temperatures often leads to an explosive destruction of every third sample. Changes in fracture toughness, crack resistance, specific energy consumption on quasi-static destruction have been described in mathematic formula.
About the Authors
S. N. Leonovich
Belarusian National Technical University
D. A. Litvinovsky
Брестский государственный технический университет
References
1. Милованов, А. Ф. Стойкость железобетонных конструкций при пожаре // А. Ф. Милованов. – М. : Стройиздат, 1998. – 304 с.
2. Ройтман, В. М. Инженерные решения по оценке огнестойкости проектируемых и реконструируемых зданий // В. М. Ройтман. – М. : Пожарная безопасность и наука, 2001. – 382 с.
3. Castillo, C. Effect of transient high temperature on high-strength concrete / C. Castillo // ACI structural journal. – 1990. – Vol. 87. – P. 8.
4. Djaknoun, S. Characterization of the Fracture Toughness of the Concrete Mortars Exposed to Elevated Temperatures. Laboratoire de Mecanique / S. Djaknoun // American Journal of Applied Sciences. – 2009. – Vol. 6 (2). – P. 296–305.
5. Zhang, B. Fracture energy of high-perfomance concrete at high temperatures up to 450 oC: the effect of heating temperatures and testing conditions; Napier University; University of Glasgow / B. Zhang // Magazine of concrete Research. – 2006. – Vol. 58. – P. 277–288.
6. Phan, L. T. Mechanical properties of high-strength concrete at elevated temperatures / L. T. Phan // NISTIR 6726, National Institute of Standards and Technology. – 2001.
7. Pimienta, P. The impact of the addition of polypropulene fibres on the mechanical properties of high performance concretes exposed to high temperatures / P. Pimienta // 6th International RILEM Symposium on Fibre Reinforced Concretes. – 2004.
8. Schneider, U. The fracture mechanical behavior of HPC and OPC at high temperature / U. Schneider // Vienna University of Technology, 2009.
Review
For citations:
Leonovich S.N., Litvinovsky D.A. ANALYTICAL DEPENDENCES OF STRENGTH, DEFORMATION, FORCE AND ENERGY PARAMETERS OF HIGH STRENGTH CONCRETE AT HEATING PROCESS. Science & Technique. 2011;(4):30-34. (In Russ.)
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