APATITE-BASED CEMENT DESIGN SUPPORTING DEVICE

PURPOSE:To obtain the title device capable of simply designing apatite-based cement materials in extremely high efficiency by combining cement constituent components with a reaction product, standard formed free energy thereof, numerical value of solubility product and imaginary reaction formula. CONSTITUTION:(a) Free energy change of reaction is calculated in a reaction system comprising indicated cement constituent components and water. Then the calculated result is collated with a preset range of energy change required for progress of reaction to reason possibility of perpetuity. Further, (b) when the cement constituent components are a single component, change of free energy resulting from precipitation of HAp or OCP is calculated from equilibrium solution composition based on solubility of cement constituent component and supersaturation degree on HAp or OCP thereof. The calculated result is collated with the judging standard similar to that used in the process (a) and possibility of hydraulic nature of the cement constituent components is reasoned.