低热水泥胶凝体系力学及热学综合性能评价

为了对低热硅酸盐水泥胶凝体系力学和热学综合性能进行评价,从而为低热水泥在大体积混凝土中的应用提供参考,以胶凝材料不同龄期抗压强度、抗折强度和水化热为指标,通过限定上限/下限线性计算规则建立评价目标函数,计算不同矿物掺合料下的低热水泥胶凝体系综合性能满意度,并绘制满意度等值线图。研究结果表明:低热水泥胶凝体系综合性能满意度等值线分布可以近似看作系列同心椭圆线;粉煤灰掺量在区间、矿渣粉掺量在区间范围内其综合性能满意度较高,具备较好的早强低热性能。该性能评价函数以及满意度等值线图的联合运用,为复合胶凝材料体系力学及热学综合性能评价提供了新的思路。

Evaluation of Mechanical and Thermal Properties of Low-heat Cement Binding System

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.