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

P N Ojha, Brijesh Singh, Pranay Singh, Piyush Mittal, Abhishek Singh

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.

Keywords


Very High Strength Concrete; Compressive strength; Stress-Strain Curve; LVDT; Compressometer.

Full Text:

PDF

DOI: http://dx.doi.org/10.7764/RIC.00046.21

Refbacks



Copyright (c) 2022 Revista Ingeniería de Construcción

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Link partner: dewagg luxury12 liveslot168 luck365 kingceme mantap168 koko303 harta138 joker99 gacor77 qq1221 qqdewa qqalfa qqpulsa qq88asia qqslot777 qqnusa slot5000 idngg vegas4d slotsgg gen77 luxury138 idncash qq8821 liga788 ingatbola88 harum4d luxury777 kaisar888 gem188 ligaplay88 laskar138 okeplay777 goyangtoto babetoto asian4d birutoto kong4d kenzototo warungtoto pokerseri autowin88 vegas77 slot gacor