Numerical method for two-dimensional simulation of cement hydration and its application

The initial distribution of cement particles within a square element is obtained by introducing periodic boundary conditions.In the two-dimensional simulation of the cement hydration,all points on the cement surface are assumed to have an equal reaction rate and each cement particle is represented by three concentric circles.By introducing three parameters,the mutual interference between neighbouring cement particles is quantified and the incremental relationships among various phase constituents are established.The validity of the proposed numerical method is verified by comparing its results with the exiting test results.The effect of curing temperature on the degree of hydration is analyzed.The area fractions of capillary pores,unhydrated cement and hydrated products as well as the variations of the two-point probability function of capillary pores and the capillary perimeter per unit area with hydration time are quantitatively analyzed by means of the proposed method.Some useful conclusions are drawn.