Bond strength is one among the important
property of hardened concrete. Bond between the reinforcement and concrete
influences the behavior of structural concrete in many respects. The quality
and quantity of ingredients used for making the concrete affect the bond
strength of concrete. The addition of mineral admixtures like fly ash, silica
fume, rice husk ash etc. into the cement by means of replacing the cement
content is nowadays considering as an important matter for protecting the
environment against any hazardous situations and also recycling the waste
by-products into an effective manner. But, the addition of mineral admixtures
affects the structural system of cement and also in concrete. It also leads to
the variations in the properties of concrete both fresh and hardened state.
With these in mind, the bond strength variations of ternary blended concrete
were examined in this experimental investigation and compared with the normal
strength concrete. The class F type Fly Ash (FA) was used for making the binary
blended concrete. In addition to that Silica Fume (SF) and Rice Husk Ash were
(RHA) considered for developing the ternary blended concrete. For studying the
effect of rebar corrosion on the behavior of bond of concrete, experimental
studies were carried out to accelerate the corrosion and to find out the
variations in bond strength. In the binary mix with 20% FA improves the slump
value about 80% more than the control concrete. The addition of SF and RHA as
the second mineral admixture in the concrete mixes reduces the slump value of
fresh concrete.
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and Rasheeduzzafar. (1990) ‘Influence of corrosion and cracking on bond
behaviour and strength of reinforced concrete members’, ACI Structural Journal,
pp 220-231.
