Reinforcements bond stress with steel bars

RubCon structures reinforced with steel-ribbed bars have a high bond stress due to adhesion and forces of mechanical bond. 

Crete is stressed in tension. Although the tensile strength of concrete-polymer is higher by a factor of 4 than that of concrete, it is still relatively low compared with that of steel. Standard tests on reinforcing bars in which a 1-inch diameter steel rod is pulled out of a 6-inch diameter concrete cylinder indicated that the force needed to pull the bar from a concrete-polymer cylinder was three times the force required for a cylinder of ordinary concrete. This greatly improved bond strength between concrete-polymer and steel is important in concrete structural design. 

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