Abstract
The performance of cellulose fiber-reinforced cement-based composites (CFCCs) depends not only on the characteristics of the cement matrix and fibers but also on the bonding property of the matrix and fibers. The durability of cement-based composites including various properties such as impermeability, frost resistance, and carbonization resistance has an important impact on the long-term service life of the matrix structure. The presence of a large number of hydroxyl groups on the molecular chain of cellulose can promote the formation of intra- and intermolecular hydrogen bonds of cellulose. This special structure imparts the cellulose high hydrophilicity, which leads the cement hydration C-S-H gel to adhere to the surface of cellulosic fibers (CFs) and induce its growth. The cavity of CFs has good water absorption and can be used as an internal curing fiber for the continuous hydration of cement-based composites. But CFs in the Portland cement matrix tend to deteriorate under strong alkali conditions. This paper presents a review of the research on the durability of CFCCs. The methods and paths to improve the durability of CFCCs are summarized and analyzed from the perspectives of the internal curing of CFs, the deterioration of the performance of CFs in the matrix, and the use of many types of supplementary cementitious materials. Finally, the development and engineering application of CFCCs have been prospected.
Highlights
In the last few years, more and more different types of fibers have been used to reinforce cement-based composites
This paper presents a review of the research done in the area of the durability of cellulose fiber-reinforced cement-based composites (CFCCs) during the last years (2005.01-2021.05), which used Chinese journal literature retrieval databases, including China Journal Network and CNKI Scholar, English journal literature retrieval databases, and so on
The hydrophilicity and unique hollow structure of cellulosic fibers (CFs) optimize the pore structure of cement-based composites, so CFs can significantly improve the permeability, frost resistance, and carbonization resistance of CFCCs
Summary
In the last few years, more and more different types of fibers have been used to reinforce cement-based composites As is known, these fibers include steel, organic synthetic, carbon, and glass fibers. CFs have a larger specific surface area, aspect ratio, excellent toughness, and bonding ability It disperses evenly in the cement matrix, has good compatibility, and has a filling and bridging effect on the cement matrix [14]. The durability of cement-based composites includes impermeability, frost resistance, carbonization resistance, and resistance to sulfate attack, which have an important impact on the long-term service life of the structure [25]. The durability of CFCCs such as impermeability, frost resistance, and carbonization resistance is reviewed, and the impact of CFs on the durability of composites and the internal curing of CFs is discussed in this paper. From the perspectives of the performance, the degradation of CFs in the matrix, and the application of multiple types of auxiliary gel materials, a summary analysis is made to improve the durability of CFCCs, and the solutions are proposed
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
