Investigation on Microstructure Evolution of Cement-based Materials with Ferrite Oxide Addition Responding to Elevated Temperature
Author(s): Dong Cui, Wei Sun
Paper category: Proceedings
Book title: 3rd International RILEM Conference on Microstructure Related Durability of Cementitious Composites
Editor(s): Changwen Miao, Wei Sun, Jiaping Liu, Huisu Chen, Guang Ye and Klaas van Breugel
Publisher: RILEM Publications SARL
Publication year: 2016
Total Pages : 9
Language : English
Abstract: Ferrite Oxide is one important chemical addictive in cement industry. The material is unreplaceable in the construction of nuclear power plant, to oxidize Zirconium, mitigating the threat from nuclear pollution. Also, Ferrite Oxide is commonly used as dye in cement-based materials, the material is capable of offering concrete a red appearance. In this paper, to simulate the service life in nuclear plant, the response of concrete with Ferrite Oxide to elevated temperature was studied, specimens with different fiber contents were exposed to 50 C , 100 C and 150 C separately for 2 weeks before microstructure tests, spatial distribution of porosity after thermal pretreatments was obtained from Dual CT Scans. At the same time, permeability tests and mechanical tests were conducted on these specimens. The results show that the microstructure got deteriorated on a higher extent after thermal pretreatments for the groups with Ferrite Oxide evolvement, especially after exposing to 100 C.
The deterioration can also be reflected on permeability and mechanical tests. The result proves that sole addition of Ferrite Oxide may not be enough to enhance the durability performance. By the way, the work done in this paper illuminates the possibility to use Dual CT Scan for detection of defect in cement based specimens.
Online publication : 2016
Publication type : full_text
Public price (Euros) : 0.00