根据Powers提出的体积模型，应用复合材料细观力学理论，建立了水泥基材料的多相细观力学模型。将硬化水泥浆体中的水化产物、未水化水泥颗粒和水(孔洞)分别视为夹杂、基体及等效介质，模拟了不同水灰比情况下水泥浆体弹性力学性质随水化程度的演化规律。模型需要的参数均为水泥浆体各组分的力学参数,应用较为方便。模型应用实例表明，随着水泥水化过程的进行，水泥浆体的弹性模量逐渐增大，而泊松比逐渐减小；在水化程度相同的情况下，弹性模量随水灰比的增大而减小。通过对模拟与试验结果的对比分析，证明了该模型能够有效地预测水泥浆体的弹性力学性质。

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.

江西省教育厅青年科学基金资助项目(GJJ133556);江西科技师范大学博士科研启动基金资助项目。