硅酸盐学报2017，Vol.45Issue(11)：1613-1620,8.DOI:10.14062/j.issn.0454-5648.2017.11.07
硫铝酸盐基复合胶凝体系水化性能的温度敏感性
Temperature Sensitivity of Hydration Properties of Calcium Sulfoaluminate Cement Based Blends
摘要
Abstract
The initial setting time, compressive strength development and phase composition of calcium sulfoaluminate (CSA) clinker-Portland cement-anhydrite ternary system (abbreviation: ternary system) at different temperatures (i.e., 5, 20 and 40℃ ) were investigated. The results indicate that the temperature sensitivity of the hydration properties of calcium sulfoaluminate cement based blends depends on the mix proportions, which results from the prominent difference in hydration products. Compared to neat CSA clinker, the addition of Portland cement enables the main hydrates switching from ettringite to str?tlingite, resulting in a decrease of 3-d compressive strength. The addition of anhydrite or together with Portland cement promotes the formation of ettringite, and thus prohibits the conversion to monosulfate (especially at an elevate temperature), leading to a higher compressive strength at an elevate temperature. In addition, the dosage of Portland cement in ternary system should exceed 30% to obtain stable initial setting time at nevertheless low (5℃ ) or elevate temperature (40℃ ). The amount of anhydrite should be greater than 25% to achieve the comparatively similar 3-d and 28-d compressive strength.关键词
混合水泥/硫铝酸盐水泥/无水石膏/温度/性能Key words
blended cement/calcium sulfoaluminate cement/anhydrite/temperature/properties分类
化学化工引用本文复制引用
徐玲琳,范胜华,张国防,王培铭..硫铝酸盐基复合胶凝体系水化性能的温度敏感性[J].硅酸盐学报,2017,45(11):1613-1620,8.基金项目
国家自然科学基金(51402216) （51402216）
国家重点研发计划项目(2016YFC0700905) （2016YFC0700905）
中德科学中心项目(GZ1290). （GZ1290）
