Abstract: The mortar strength and hydration heat in different ages of low-heat cement material are investigated and an evaluation function of its mechanical and thermal properties is established by limited upper (or lower) bound linear rule to provide reference for the application of low-heat cement to mass concrete. On this basis, the satisfaction on the comprehensive performance of cementitious materials is calculated to draw a satisfaction contour map. Research results show that: the contours of satisfaction on comprehensive performance of low-heat cement cementitious system can be approximated as a series of concentric elliptical lines, and the cementitious material system with fly ash content in and slag content in has high comprehensive performance for lower hydration heat and higher strength. The combination of evaluation function and satisfaction contour map provides a new idea for the comprehensive performance evaluation of composite cementitious material system.

Key words: low heat Portland cement, compound cementitious material, objective function for evaluation, comprehensive performance, hydration heat, mineral admixtures