Hoang Nguyen, Paivo Kinnunen, Valter Carvelli, Mirja Illikainen, Durability of ettringite-based composite reinforced with polypropylene fibers under combined chemical and physical attack, Cement and Concrete Composites, Volume 102, 2019,Pages 157-168, ISSN 0958-9465, https://doi.org/10.1016/j.cemconcomp.2019.04.021
Durability of ettringite-based composite reinforced with polypropylene fibers under combined chemical and physical attack
|Author:||Nguyen, Hoang1; Kinnunen, Päivö1; Carvelli, Valter2;|
1Fibre and Particle Engineering Research Unit, University of Oulu, Pentti Kaiteran katu 1, 90014 Oulu, Finland
2Department A.B.C., Politecnico di Milano, Piazza Leonardo Da Vinci 32, 20133 Milan, Italy
|Online Access:||PDF Full Text (PDF, 7.1 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2019043013713
|Publish Date:|| 2019-04-30
High-performance fiber reinforced cementitious composites from ettringite-based binders require much understanding of durability before its real-life applications in construction industry. A strain-hardening fiber reinforced ettringite-based composite from the hydration between ladle slag and gypsum with polypropylene (PP) fibers was the object in this study. To investigate the durability of the developed composite under aggressive conditions in cold regions (e.g., the Northern Europe), the material was subjected to a combined sodium sulfate-chloride solution along with freeze-thaw cycling process, which represented the marine environment of cold regions. The experimental study reports the vital role of PP fibers in control crack propagation and, hence, greatly enhanced the durability of the composite. In addition, the developed composite attained good mechanical performance with deflection-hardening behavior and multiple crack even after aging processes. Materials, aged in water, was mainly destructed by volume expansion from water uptake in structural pores, while those, cured in Na2SO4NaCl solution, was mainly spoiled by volume increase from both physical and chemical attacks.
Cement & concrete composites
|Pages:||157 - 168|
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
212 Civil and construction engineering
216 Materials engineering
This work was done under MINSI-project (project number: A70189) funded by ERDF and FLOW-project (project number: 8904/31/2017) funded by Business Finland in the ERA-MIN 2 Research and Innovation programme (H2020 grant agreement No. 730238). Hoang Nguyen gratefully acknowledges the financial support from Tauno Tönning Foundation.
© 2019 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/BY-NC-ND/4.0/).