Abstract: Byusing the simplex centroid design method, the cementitious system of cement-limestone powder-slag cement pastes was designed, and then effects of carboaluminate on the anti-chloride ion penetration performance, Friedel's salt and pore structure of cement pastes were also investigated through X-ray diffraction analysis, thermogravimetric analysis and mercury intrusion porosimetry. The results show that, the chloride migration coefficient of cement pastes with 25% and 50% limestone powder increased by 193.02% and 534.50%, respectively, compared with that of cement pastes without limestone powder; the chloride migration coefficient of cement pastes with 25% limestone powder and 25% slag decreased by 85.98%, compared with that of cement pastes with 50% limestone powder. The amount of carboaluminate increased with the increase of limestone powder. The incorporation of slag increased the content of carboaluminate. The diffraction peaks of carboaluminate were not found after RCM test. The amount of Friedel's salt of cement pastes with 0%, 25% and 50% limestone powder was 2.74%, 2.94%, 1.09%, respectively. Compared with cement pastes with 50% limestone powder, the amount of Friedel's salt of cement pastes with 25% limestone powder and 25% slag increased by 363.30%. The more limestone powder was added, the larger porosity and the most probable pore diameter of the cement pastes were. The porosity and the most probable pore diameter of cement pastes with 25% limestone powder and 25% slag decreased by 31.23% and 57.84%, respectively, compared with that of cement pastes with 50% limestone powder. The formation of Friedel's salt after RCM test improved the pore structure of cement pastes.
作者简介: 罗素蓉,福州大学教授、硕士研究生导师,兼任福建省“2011计划”环保节能型高性能混凝土协同创新中心副主任,福建省土木建筑学会常务理事、建筑材料学术委员会常务副会长,中国大坝工程学会大坝混凝土与岩石断裂力学专业委员会副主任。1983年,于福州大学获得本科学位。长期从事高性能混凝土和再生骨料混凝土研究,主持3项国家自然科学基金面上项目和1项国家自然科学基金海峡联合基金重点支持项目子课题,以第一作者或通讯作者发表20余篇高水平SCI/EI论文。 王德辉,福州大学土木工程学院副研究员、硕士研究生导师。2004年、2009年、2015年分别于华北水利水电大学、中南大学、湖南大学获得本科、硕士、博士学位。主持了1项国家重点研发计划项目子课题和1项国家自然基金青年科学基金项目,以第一作者或通讯作者发表了11篇SCI论文和4篇EI论文。参编会议论文集1部。多篇SCI论文在TOP期刊成为“The Most Downloaded Article”,并得到多次引用。担任国际著名期刊评审人,被Construction and Building Materials评为卓越审稿人。主要从事超高性能混凝土的凝结硬化、石灰石粉对水泥基材料凝结硬化和性能的影响、腐蚀性物质在FRP筋海水海砂混凝土中的传输特性和腐蚀机理等研究工作。
引用本文:
罗素蓉, 贾旭秀, 王德辉. 碳铝酸盐对水泥-石灰石粉-矿粉胶凝体系抗氯离子渗透性能的影响[J]. 材料导报, 2022, 36(11): 21040039-6.
LUO Surong, JIA Xuxiu, WANG Dehui. Effects of Carboaluminate on Anti-Chloride Ion Penetration Performance of Cement-Limestone Powder-Slag Cementitious Materials. Materials Reports, 2022, 36(11): 21040039-6.
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2022, Vol. 36 
