Polymer Effects on the Vibration Damping Behavior of Cement

In this paper, the vibration damping properties of polymer-modified-cement (PMC) have been studied. The storage modulus $\left(E^{\prime }\right)$ and loss tangent $\left(\tan \delta \right)$ of PMC were studied by using a free vibration method. The propagation velocity of stress wave $V$ and the scattered damping of stress wave in PMC were studied by using an ultrasonic testing method. When a suitable polymer is added in the cement, the storage modulus, the velocity of stress waves are decreased with an increase of the polymer/cement ratio (P/C), and the loss tangent is increased with an increase of P/C, thus the ability to vibration damping of PMC is improved. As the P/C is between 15 and 20%, the PMC demonstrates the best vibration damping within the adopted range of testing.