摘要
对深圳平安金融中心2年龄期大掺量粉煤灰混凝土基础底板钻芯取样试件进行了强度、渗透性、碳化深度测试,并通过扫描电镜观察了试件中硬化浆体的微观结构。结果显示:大掺量粉煤灰混凝土长龄期力学性能和耐久性能优异;复合胶凝材料硬化浆体密实,骨料与浆体之间结合紧密;粉煤灰反应程度较高,体系中Ca(OH)2含量较低,硬化浆体中生成大量低Ca/Si的C-S-H凝胶。
The strength, permeability, carbonation depth of the concrete foundation slab of Ping’ an International Financial Center in Shenzhen were tested, and the microstructure of the hardened paste was observed by means of SEM. The results show that the concrete containing high volume of fly ash has a high strength and good durability at the long-term age. The cementfly ash composite binder paste is very dense and the hardened paste is closely bonded with aggregates. The reaction degree of fly ash is high, resulting in reducing a large amount of Ca（ OH） 2 . A great quantity of C-S-H gel with lower Ca/Si ratio is produced in the cementfly ash composite binder paste.
出处
《电子显微学报》
CAS
CSCD
2014年第6期516-520,共5页
Journal of Chinese Electron Microscopy Society
基金
国家自然科学基金资助项目(No.51278277)
