Prediction of Elastic Modulus of Cement Paste Based on Power’s Volume Model
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Abstract:
Based on the micromechanics theory of composite materials and Power’s Volume model, a multi-phase micromechanics model was developed to simulate the elastic properties of cement pastes. The hydrated products, unhydrated cement, and water (capillary pores) in the hardened cement paste were regarded as matrix, inclusion, and equivalent medium respectively, and the evolution law of elastic properties in the hydration process was simulated with different water-cement ratios. The inputs of the proposed model were the intrinsic properties of the components of cement pastes and thus can be easily obtained. The model results showed that with the development of the cement hydration process, the elastic modulus of cement paste increases gradually, but the Poisson's ratio is gradually reduced. Also, under the conditions of same hydration degree, the elastic modulus increased with the increasing of water-cement ratio. Compared with the experimental results, the model can effectively predict the elastic properties of cement paste.