摘要
为探明碱矿渣胶凝材料(AAS)固化核素Sr2+后,固化体性能的变化。利用矿渣粉、水玻璃、水和Sr(NO3)2制备了碱矿渣固化体,并研究了Sr(NO3)2对AAS固化体结构和性能的影响。结果表明,Sr(NO3)2使得AAS固化体的结晶程度和水化放热均降低,延缓了浆体的凝结硬化;Sr2+破坏了Si—O—Al基团的形成过程,阻碍了二次C-S-H的形成。Sr(NO3)2的掺入降低了AAS固化体的3 d抗压强度;但当Sr2+掺量小于0.4%时,AAS固化体的28 d抗压强度增加。
To explore the performance of the alkali-activated slag( AAS) solidified body with Sr2 +. AAS solidified body had been prepared using slag,water glass,water and strontium nitrate. The influence of strontium nitrate on the microstructure and properties of AAS had been researched. The results showed that Sr( NO3)2decreased the crystallization degree and hydration heat release of AAS,which made the setting and hardening process of AAS paste delay. This was because Sr2 +damaged the formation of Si—O—Al groups and C-S-H. The 3 d compressive strength of AAS decreased while Sr2 +presence. However,the 28 d compressive strength of AAS increased with less than 0. 4wt% of Sr2 +addition.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2015年第12期12029-12033,共5页
Journal of Functional Materials
基金
国家科技支撑计划资助项目(2011BAA04B04)
西南科技大学研究生创新基金资助项目(14ycxjj0011)
关键词
Sr(NO3)2
碱矿渣
结构
性能
strontium nitrate
alkali-activated slag
structure
property
