1. Influence of Fly Ash on Microstructure of Complex Binder Pastes
- Author
-
Hua Quan Yang, Xiang Li, and Jian Jun Yan
- Subjects
Cement ,chemistry.chemical_compound ,Calcium hydroxide ,Materials science ,chemistry ,Fly ash ,General Engineering ,Cementitious ,Composite material ,Microstructure ,Curing (chemistry) - Abstract
The microstructure of complex binder pastes was investigated by means of XRD and SEM-EDS. The results show that adding fly ash means decline of cement content in cementitious materials, which leads to the decrease of Ca (OH)2 content in complex binder pastes. The Ca (OH)2 crystal still exists in the complex binder pastes at the age of 360 days. By replacing part of cement with fly ash, the early microstructure of complex binder pastes becomes loosened. With the extension of curing ages, a great quantity of low CaO/SiO2 ratio of C-S-H gel is generated, which makes complex binder pastes compact gradually.
- Published
- 2015