Fracture and fatigue of natural fiber-reinforced cementitious composites
This paper presents the results of an experimental study of resistance-curve behavior and fatigue crack growth in cementitious matrices reinforced with eco-friendly natural fibers obtained from agricultural by-products. The composites include: blast furnace slag cement reinforced with pulped fibers of sisal, banana and bleached eucalyptus pulp, and ordinary Portland cement composites reinforced with bleached eucalyptus pulp. Fracture resistance (R-curve) and fatigue crack growth behavior were studied using single-edge notched bend specimens. The observed stable crack growth behavior was then related to crack/microstructure interactions that were elucidated via scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). Fracture mechanics models were used to quantify the observed crack-tip shielding due to crack-bridging. The implications of the results are also discussed for the design of natural fiber-reinforced composite materials for affordable housing. © 2009 Elsevier Ltd. All rights reserved.
Publication Source (Journal or Book title)
Cement and Concrete Composites
Savastano, H., Santos, S., Radonjic, M., & Soboyejo, W. (2009). Fracture and fatigue of natural fiber-reinforced cementitious composites. Cement and Concrete Composites, 31 (4), 232-243. https://doi.org/10.1016/j.cemconcomp.2009.02.006