Experimental determination of stress-strain characteristics of very high strength unconfined concrete in compression including comparison with normal and high strength concrete

Authors

  • Pranay Singh National Council For Cement and Building Materials, Faridabad
  • P.N. Ojha National Council For Cement and Building Materials, Faridabad
  • Brijesh Singh National Council For Cement and Building Materials, Faridabad
  • Piyush Mittal National Council For Cement and Building Materials, Faridabad
  • Abhishek Singh National Council For Cement and Building Materials, Faridabad

DOI:

https://doi.org/10.7764/RIC.00046.21%20

Keywords:

Very high strength concrete, compressive strength, Stress-Strain Curve, LVDT, compressometer

Abstract

Indian standard Code-IS:456-2000 and Eurocode EC:02-2004 for the design of the concrete structure is limited to the concrete with compressive strength of 55 MPa and 90 MPa respectively. For defining the stress block parameters and for the design of concrete structures using Very high strength concrete (100 MPa to 150MPa); a well-defined stressstrain behavior becomes necessary, particularly the experimental values for the strain at peak stress and ultimate strain capacity. The presents study attempts to cater to these needs by experimentally evaluating the unconfined stressstrain behavior of nine cylindrical specimens with a compressive strength between 100 MPa to 150 MPa, in a servocontrolled (Strain-controlled) compression testing machine. The strain values recorded at peak stress for 100 MPa and 150 MPa concrete are approximately 3000 microstrains and 3500 microstrains respectively. Compared to normal and high-strength concrete, the rising limb of the curves for VHSC (Very high strength concrete) is much steeper and approaches a straight path, also the strain at peak stress and ultimate strain coincide, depicting a negligible post-peak strain hardening region. LVDT and compressometer gave different strains for the same load and specimen. This signifies the role of the gauge length ratio used in these strain measuring devices.

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Published

2022-12-31

How to Cite

Singh, P., Ojha, P., Singh, B., Mittal, P. ., & Singh, . A. (2022). Experimental determination of stress-strain characteristics of very high strength unconfined concrete in compression including comparison with normal and high strength concrete. Revista Ingeniería De Construcción, 37(3). https://doi.org/10.7764/RIC.00046.21

Issue

Section

Original Research