Shrinkage Performance of Adherence of New Steel Fiber-Reinforced Concrete to Old Concrete
Shrinkage experiments were done to determine the influence of the volume fraction of steel fiber-reinforcement on the bonding behavior between new concrete and old concrete. The mechanics of the model of restricted shrinkage upon the adherence of new steel fiber reinforced concrete to old concrete are described. The results demonstrate that the difference of shrinkage between the new and the old concrete can been reduced by adding steel fiber to the new concrete. The decrease of shrinkage difference reduces the shrinkage force at the adhesive interface, which improves the adhesion of new concrete to old concrete and the magnitude of the decrease of shrinkage difference is correlated to the steel fiber volume fraction.
H. Q. Cheng and D. Y. Gao, "Shrinkage Performance of Adherence of New Steel Fiber-Reinforced Concrete to Old Concrete", Advanced Materials Research, Vols. 163-167, pp. 3569-3574, 2011