Influence of Fly Ash on Microstructure of Complex Binder Pastes

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.

• Periodical: Advanced Materials Research (Volume 1088)
• Pages: 608-612
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1088.608
• Online since: February 2015
• Authors: Xiang Li*, Jian Jun Yan, Hua Quan Yang
• Keywords: Calcium Hydroxide, Cement, C-S-H Gel, Fly Ash, Microstructure

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