关键词: 低热水泥, 水化热, 胶凝体系, 矿物掺合料

Abstract: In order to evaluate the applicability of several traditional hydration heat calculation methods to cementing system of low heat cement and propose a new calculation formula, hydration heat of low heat cement on 7th day with different amount of fly ash and slag is measured by direct method. Then the results from mineral component method, conversion formula method and numerical fitting method are compared with that of direct method, in which the parameters of different methods are adjusted and their applicability is evaluated. Research results show that mineral component method can only calculate hydration heat of characteristic age cement and the calculated result is far different from the experimental result; conversion formula method is proper for the hydration heat on 7th day calculation of single admixture cementing material; numerical fitting method is applicable to the low heat cement cementing system with different amount of fly ash and slag, whose final hydration heats are 126.6 J/g and 172.4 J/g respectively. The research results can provide basic data reference for the calculation of adiabatic temperature rise of mass concrete.

Key words: low heat cement, hydration heat, cementing system, mineral additives