Effects of adding waste cellulosic fibers on the frost resistance of SCC

Author(s): E. Ghorbel, G. Wardeh, M. Mohamed
Paper category: Conference
Book title: 2nd International conference on Microstructural-related Durability of Cementitious Composites
Editor(s): Guang Ye, K. Van Breugel, Wei Sun, Changwen Miao
Print ISBN: 978-2-35158-129-2
e-ISBN: 978-2-35158-123-0
Publisher: RILEM Publications SARL
Pages: 1469- 1477
Total Pages: 8
Language: English

Abstract: 
The aim of this study is to evaluate frost durability of self compacting concrete (SCC) and cellulose based fibred self compacting concrete (FSCC). The two materials were prepared with cement content of 350kg/m3, water/powder ratio of 0.35 and cellulose based vegetable fiber content of 21% by volume of cement for the fibred one. At this fiber content it was found that the mechanical properties enhancement of FSCC is accompanied by a decrease in the porosity and the intrinsic permeability compared to SCC.

The performance of two concretes exposed to freezing-thawing cycles was assessed from length change, mechanical properties, resonance frequency and permeability measurements of the test specimens before and after cycles. The results show that the two materials are not frost resistant and that FSCC is more sensitive to frost action than SCC in spite of its better mechanical properties. This low resistance is attributed to the low water transport properties which prevent water movement under driven hydraulic pressures and to the poor pore size distribution. Moreover the role of used aggregates in the frost resistance was also discussed.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00