Effect on mechanical properties and stress strain characteristics of normal and high strength concrete at elevated temperature

  • Vikas Patel National Council for Cement and Building Materials, 34, KM Stone, Delhi Mathura Road, NH-2, Ballabgarh, Haryana
  • Brijesh Singh National Council for Cement and Building Materials, 34, KM Stone, Delhi Mathura Road, NH-2, Ballabgarh, Haryana
  • P N Ojha National Council for Cement and Building Materials, 34, KM Stone, Delhi Mathura Road, NH-2, Ballabgarh, Haryana.
  • B N Mohapatra National Council for Cement and Building Materials, 34, KM Stone, Delhi Mathura Road, NH-2, Ballabgarh, Haryana.
Keywords: High strength concrete (HSC), Stress Strain Characteristics, Spalling of concrete, Polypropylene fiber

Abstract

High strength concrete (HSC) has some disadvantages such as brittleness and poor resistance to fire. Fire exposure affects the concrete in way that the disintegration of concrete starts and a severe surface spalling occurs at very high temperatures. Therefore, the structural behaviour or response to the load will change after fire exposure and the structural members may not behave as they were designed. Further, the basics of flexural design depend on the stress- strain response of the concrete which is also affected upon fire exposure. Hence, this study is carried out to provide useful input to aid the provision of a fire resistance for structural behaviour of concrete by investigating the effects on mechanical properties of concrete after exposure to high temperatures up to 600°C and establishing a stress-strain relationship. The concrete cylinders of size 100 mm x 200 mm were exposed to the temperature of 2000C, 4000C and 6000C after which the residual compressive strength, split tensile strength and flexural strength were recorded. For stress strain characteristics, 100 × 200 mm cylinders with polypropylene fiber content of 0.5% by volume of concrete were subjected to temperature exposure of 6000C for durations of 1 hour. Curves for reduction factors of strength and stress strain characteristics after fire/elevated temperature exposure has been established. Just consideration of reduced strength for assessment after fire exposure will not serve the purpose as the change in load response and increased deformation capacity also needs to be addressed properly.

References

Arora, V. V., Singh, B., & Jain, S. (2016). Experimental studies on short term mechanical properties of high strength concrete. Indian Concrete Journal, 90(10), 65-75.

Arora, V. V., Singh, B., & Jain, S. (2017). Effect of indigenous aggregate type on mechanical properties of high strength concrete. Indian Concr J, 91(1), 34-41.

Bagherzadeh, R., Pakravan, H. R., Sadeghi, A. H., Latifi, M., & Merati, A. A. (2012). An investigation on adding polypropylene fibers to reinforce lightweight cement composites (LWC). Journal of Engineered Fibers and Fabrics, 7(4), 155892501200700410.

Cheng, F. P., Kodur, V. K. R., & Wang, T. C. (2004). Stress-strain curves for high strength concrete at elevated temperatures. Journal of Materials in Civil Engineering, 16(1), 84-90.

Diederichs, U., Ehm, C., Weber, A., & Becker, G. (1987). Deformation behaviour of HTR-concrete under biaxial stresses and elevated temperatures, Proceedings of the 9th International Conference on Structural Mechanics in Reactor technology, Lausanne (Switzerland), Vol H, paper h 2/3, Aug 17-21.

Guendouz, M., Debieb, F., Boukendakdji, O., Kadri, E. H., Bentchikou, M., & Soualhi, H. (2016). Use of plastic waste in sand concrete. J. Mater. Environ. Sci, 7(2), 382-389.

Kalifa, P., Chene, G., & Galle, C. (2001). High-temperature behaviour of HPC with polypropylene fibres: From spalling to microstructure. Cement and concrete research, 31(10), 1487-1499.

Kodur, V. K., Dwaikat, M. M. S., & Dwaikat, M. B. (2008). High-temperature properties of concrete for fire resistance modeling of structures. ACI Materials Journal, 105(5), 517.

Mydin, M. A. O., & Soleimanzadeh, S. (2012). Effect of polypropylene fiber content on flexural strength of lightweight foamed concrete at ambient and elevated temperatures. Advances in Applied Science Research, 3(5), 2837-2846.

Nishida, A. & Yamazaki, N. (1995). Study on the properties of high strength concrete with short polypropylene fiber for spalling resistance, Proceedings of the International Conference on Concrete under Severe Conditions (CONSEC'95). Sapporo, Japan. August. E&FN Spon, London, pp: 1141-1150.

Patel, V., Arora. V. V., Singh B., Kalra, M. & Adhikari S. (2019). Study On Behavior of Polypropylene Fiber Reinforced High Strength Concrete Exposed to Higher Temperatures, 16th NCB International Seminar

Phan, L. T., & Carino, N. J. (1998). Review of mechanical properties of HSC at elevated temperature. Journal of Materials in Civil Engineering, 10(1), 58-65.

Potha Raju, M., Shobha, M., & Rambabu, K. (2004). Flexural strength of fly ash concrete under elevated temperatures. Magazine of Concrete Research, 56(2), 83-88.

Ravindrarajah, R. S., Lopez, R., & Reslan, H. (2002). Effect of elevated temperature on the properties of high-strength concrete containing cement supplementary materials. In 9th International Conference on Durability of Building Materials and Components, Brisbane, Australia.

Shihada, S. (2011). Effect of polypropylene fibers on concrete fire resistance. Journal of civil engineering and management, 17(2), 259-264.

Singh, B., Patel, V., Ojha, P. N., & Arora, V. V. (2020). Analysis of stress block parameters for high strength con-crete. Journal of Asian Concrete Federation, 6(1), 1-9.

Tolentino, E., Lameiras, F. S., Gomes, A. M., Silva, C. A., & Vasconcelos, W. L. (2002). Effects of high temperature on the residual performance of Portland cement concretes. Materials research, 5(3), 301-307.

Published
2020-10-12
How to Cite
Patel, V., Singh, B., Ojha, P. N., & Mohapatra, B. N. (2020). Effect on mechanical properties and stress strain characteristics of normal and high strength concrete at elevated temperature. Journal of Building Materials and Structures, 7(2), 199-209. https://doi.org/10.34118/jbms.v7i2.767
Section
Original Articles