Abstract
Polymer-modified concrete is widely used for the rehabilitation of old damaged structures mainly due to its good adhesive performance. The interfacial bond strength between polymer-modified concrete and plain concrete should be measured carefully in order to keep both sides work together. To overcome problems existed in the test of bond strength between two types of concretes, a split apparatus was designed. Experiments on bond strength between plain concrete and polymer-modified concrete with different polymer contents and different interfacial treatments were conducted utilizing the newly devised apparatus, and a series of complete and correct results were obtained. The experimental results indicate that when the surface is treated with 10% polymer solution, the bond strength between plain concrete and polymer-modified concrete with polymer-cement ratio at 15% is better than those in other cases.
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