Title:
A new multi-scale hybrid fibre reinforced cement-based composites
Author(s):
Li, L.; Cao, M.
Publication:
Symposium Paper
Volume:
343
Issue:
Appears on pages(s):
12-19
Keywords:
Multi-scale hybrid fibre, CaCO3 whiskers, compressive behavior, flexural behavior
DOI:
Date:
10/1/2020
Abstract:
Nowadays polyvinyl alcohol (PVA) and steel hybrid fibre reinforced cement-based composites (HFRCC) are studied to resist static, seismic and impact loading. In this research, calcium carbonate (CaCO3) whisker is introduced to develop a multi-scale HFRCC, with 35mm hooked end steel fibre, 6mm PVA fibre and CaCO3 whisker. The compressive and flexural behaviors of the new HyFRCC are explored. Compared to the conventional hybrid fibers (steel fibre and PVA fibre), the addition of multi-scale fibres (steel fibre, PVA fibre and CaCO3 whisker) can improve the compressive strength and toughness of cement-based composite. Multi-scale fibre usage leads to notable increase to both the flexural strength and
flexural toughness values of cement-based composite. Based on these test results, we can conclude that there is a remarkable fiber synergy in multi-scale hybrid fibre reinforced cement-based composites with 35mm hooked end steel fibre, 6mm PVA fibre and CaCO3 whisker. Moreover, it seems possible that the steel fibres and PVA fibres can be partly replaced by CaCO3 whiskers, which is very beneficial in decreasing the production cost of HFRCC for potential structural applications.
Related References:
Banthia N. & Soleimani SM (2005), Flexural response of hybrid fibre-reinforced cementitious composites. ACI Material Journal, 6, 382-389.
Bentz DP (2000), Influence of silica fume on diffusivity in cement-based materials: II. Multiscale modeling of concrete diffusivity. Cement and Concrete Research, 30(7):1121-1129.
Cao M., Zhang C., Lv H., & Xu L. (2014), Characterization of mechanical behavior and mechanism of calcium carbonate whisker-reinforced cement mortar, Construction and Building Materials, 66, 89-97.
Cao M., Zhang C., & Lv H. (2014), Mechanical response and shrinkage performance of cementitious composites with a new fiber hybridization, Construction and Building Materials,57, 45-52.
Cao M., Zhang C., & Wei J. (2013), Microscopic reinforcement for cement based composite materials. Construction and Building Materials, 40, 14-25.
Li Q, Liu J, Xu S (2015), Progress in Research on Carbon Nanotubes Reinforced Cementitious Composites. Advances in Materials Science and Engineering, 307435, 1-16.
Nguyen VP, Stroeven M & Sluys LJ (2012), Multiscale failure modeling of concrete: Micromechanical modeling, discontinuous homogenization and parallel computations. Computer Methods in Applied Mechanics and Engineering, 201-204, 139-156.
Parveen S, Rana S, Fangueiro R (2013), A Review on Nanomaterial Dispersion, Microstructure, and Mechanical Properties of Carbon Nanotube and Nanofiber Reinforced Cementitious Composites. Journal of Nanomaterials. 710175, 1-19.