摘要
为研究纳米CaCO_3对硅酸盐水泥水化特性的影响,利用微量热仪法测试了不同掺量纳米CaCO_3对硅酸盐水泥水化放热影响,利用差示扫描热分析-热重(DSC-TG)法分析了其水化产物中Ca(OH)_2含量与结合水量,并研究不同掺量纳米CaCO_3对水泥基材料力学性能的影响。结果表明,在本试验条件下,纳米CaCO_3的掺入促进了水泥的水化放热速率,水化放热亦随之增加;随着纳米CaCO_3掺量增大,硅酸盐水泥水化生成的Ca(OH)2含量与化学结合水量皆增加;掺入纳米CaCO_3水泥基材料的抗折和抗压强度提高,掺量为1.5%(质量分数)时对水泥基材料的力学性能提高最为显著。研究结果显示纳米CaCO_3加速了硅酸盐水泥的水化。
In order to investigate the influence of nano-CaCO3 on hydration character of Portland cement,the hydration process of Portland cement with different nano-CaCO3 content was tested using Micro calorimetry,Ca（ OH）2 content and chemically combined water were analyzed using DSC-TG method.And the influences of nano-CaCO3 with different content on physical properties of cement-based materials were studied. The results show that the evolution rate of hydration heat is accelerated as well as quantity of hydration heat with the addition of nano-CaCO3. Both Ca（ OH）2 content and the chemically combined water produced by the hydration of Portland cement increase with the increasing dosage of nano-CaCO3.And the flexural strength and compressive strength are improved due to the addition of nano-CaCO3. The mechanical properties of cement-based materials containing nano-CaCO3 of 1. 5%（ in mass） are significantly improved. The results above indicate that the hydration of Portland cement can be accelerated with the incorporation of nano-CaCO3.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2016年第3期824-830,共7页
Bulletin of the Chinese Ceramic Society
基金
重庆市科委自然科学基金资助项目(cstcjcyja30004)
