| Issue |
MATEC Web Conf.
Volume 199, 2018
International Conference on Concrete Repair, Rehabilitation and Retrofitting (ICCRRR 2018)
|
|
|---|---|---|
| Article Number | 07008 | |
| Number of page(s) | 4 | |
| Section | Repair Materials and Systems | |
| DOI | https://doi.org/10.1051/matecconf/201819907008 | |
| Published online | 31 October 2018 | |
Use of polypropylene fiber and silica fume modified concrete as a repair material
1
Railway Engineering Research Institute of China Academy of Railway Sciences, Daliushu Road No.2, 100081, Beijing, China
2
Shanghai Railway Bureau, Tianmu East Road, 200071, Shanghai, China
* Corresponding author: 705478890@qq.com
Polypropylene fiber and silica fume were used to get high impermeability and cracking resistance concrete as a repair material. Results showed just incorporating fiber (without silica fume) had no obvious improvement on strength and impermeability of concrete. The usage of polypropylene fiber and silica fume together in concrete increased the compressive strength and caused a significant reduction in chloride permeability. The improvement of fiber and silica fume on concrete properties was attributed to both the anti-cracking effect from polypropylene fiber and densification reinforcement action to the interfacial transition zones of both fiber —matrix and aggregate—cement paste from silica fume. These properties made them suitable for certain applications such as concrete repairs.
© The Authors, published by EDP Sciences, 2018
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