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Viewing report
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EFFECT OF HIGH TEMPERATURE ON BOND BETWEEN STEEL
REINFORCEMENT. Edition No. 1
VDM Publishing House, July 2009, Pages: 100
Bond behavior between steel reinforcement and fibre
reinforced concrete under elevated temperature of up
to 700 ºC is evaluated using prismatic double pullout
(DP) specimens. Five different high strength concrete
(HSC) mixtures (with and without fibers) were
prepared using basalt aggregate at a w/c ratio of
0.35. All specimens were cured for 28 days in a
controlled temperature-water bath at a degree of 40
ºC. Then specimens were subjected to heating by an
electrical furnace. Pullout specimens were tested
under pullout to evaluate the bond behavior between
steel reinforcement bars and surrounding concrete
mixtures before and after heating. Cubes (100mm) cast
from same mixture, cured, and heat-treated under
similar conditions were also tested to evaluate
compressive and splitting strength. The results
showed marked reductions in residual compressive,
splitting and bond strengths of HSC under exposure
temperatures. DP concrete specimens with fibers
showed better bond behavior than that of HSC. This
was represented by higher residual bond strength, and
steel-bond ductility. Mixture incorporated H-steel
fibers imparted the highest concrete-steel bond
resistance against high temperatures
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