Characteristics of Polymeric Fiber Reinforced Cementitious Composite (PFRCC) under Uniaxial Compression
DOI:
https://doi.org/10.5614/j.eng.technol.sci.2021.53.4.13Keywords:
cementitious composite, compressive strength, mathematical empirical model, reinforcing indexAbstract
This study aimed to evaluate the compressive characteristics and toughness of polymeric fiber reinforced cementitious composites (PFRCC). In the experimental program, polyvinyl alcohol (PVA) fibers were used to prepare two groups of PFRCC cylinders with different fiber contents. The main factor considered in this study was the reinforcing index. Several parameters were investigated, i.e. compressive strength, elastic modulus, strain at peak stress, Poisson?s ratio and toughness of PFRCC. The results revealed that there was a reduction in both compressive strength and elastic modulus as the reinforcing index increased, while a significant increase in the strain at peak stress was observed. Moreover, a comparison was made between different methods of toughness estimation and it was found that 7.9 was the best reinforcing index for PVA fibers based on the energy absorption performance and ductility of PFRCC. Furthermore, an empirical model is proposed in this paper to predict the PFRCC-PVA compressive stress-strain curve. The proposed model features new formulas to calculate a number of important coefficients to plot the curve based on the reinforcing index value. Besides that, the model had good convergence compared to the experimental results, with perfect values for both variance and correlation coefficient.
Downloads
References
Li, V.C. & Wang, S., Microstructure Variability and Macroscopic Composite Properties of High Performance Fiber Reinforced Cementitious Composites, Probabilistic Engineering Mechanics 21, pp. 201-206, 2006.
Li, V.C. & Kanda, T., Engineered Cementitious Composites for Structural Applications, Innovations Forum in ASCE J. Materials in Civil Engineering, 10(2), pp. 66-69, 1998.
Ezeldin, A.S. & Balaguru, P.N., Normal- and High-strength Fiber-reinforced Concrete under Compression, Journal of Materials in Civil Engineering, 4(4), pp. 415-29, 1992.
Nataraja, M.C., Dhang, N. & Gupta, A.P., Stress-strain Curves for Steel-fiber Reinforced Concrete Under Compression, Cement & Concrete Composites, 21, pp. 383-390, 1999.
Bhat, G. & Kandagor, V., Synthetic Polymer Fibers and Their Processing Requirements, Netherlands, Elsevier, 2014.
Rawal, A. & Mukhopadhyay, S., Melt Spinning of Synthetic Polymeric Filaments, Netherlands, Elsevier, 2014.
Li, V.C., Engineered Cementitious Composites (ECC) ? Material, Structural, and Durability Performance, Concrete Construction Engineering Handbook, Chapter 24, E. Nawy (Ed.), CRC Press, 2008.
Li, V.C., Fischer, G. & Lepech, M. D., Shotcreting with ECC, Spritzbeton Tagung, 2009.
Li, M., Multi-Scale Design for Durable Repair of Concrete Structures, PhD Dissertation, University of Michigan, United States, 2009.
Li, V.C., Bendable Concrete Minimizes Cracking and Fracture Problems, MRS Bulletin, 31, pp. 862, 2006.
Rokugo, K., Kunieda, M. and Miyazato, S., Structural Applications of HPFRCC in Japan, Measuring, Monitoring and Modeling Concrete Properties, an International Symposium dedicated to Professor Surendra P. Shah, Northwestern University, USA, Springer, Dordrecht, pp. 17-23, 2006.
Lepech, M.D. & Li, V.C., Application of ECC for Bridge Deck Link Slabs, Materials and Structures, 42, pp. 1185-1195, 2009.
Zhao, Z., Sun, R., Feng, Z., Wei, S. & Huang, D., Mechanical Properties and Applications of Engineered Cementitious Composites (ECC), Applied Mechanics and Materials, 405-408, pp. 2889-2892, 2013.
Zhou, J., Pan, J. & Leung, C. K. Y., Mechanical Behavior of Fiber-reinforced Engineered Cementitious Composites in Uniaxial Compression, Journal of Materials in Civil Engineering, 27(1), 04014111, 2015.
Wang, Z., Zuo, J., Zhang, X., Jiang, G. & Feng, L., Stress-strain Behaviour of Hybrid-fibre Engineered Cementitious Composite in Compression, Advances in Cement Research, 32(2) pp. 53-65, 2020.
Mohammed, B.S., Baharun, M.H., Nuruddin, M.F., Erikole, O.P.D. & Murshed, N.A., Mechanical Properties of Engineered Cementitious Composites Mixture, Applied Mechanics and Materials, 567, pp. 428-433, 2014.
B/525 Technical Committee Baces, British Standard for the Design and Construction of Reinforced and Prestressed Concrete Structures, BS 8110, Standards Board BSI, United Kingdom, 1997.
Fanella, D.A. & Naaman, A.E., Stress-Strain Properties of Fiber Reinforced Mortar in Compression, ACI Journal, 82(4), pp. 475-83, 1985.
Mansur, M.A., Chin. M.S. & Wee, T.H., Stress-strain Relationship of High-strength Fiber Concrete in Compression, Journal of Materials in Civil Engineering, 11(1), pp. 21-9, 1999.
Cascari, A., Aiello, M.A. & Triantafillou, T., Analysis-oriented Model for Concrete and Masonry Confined with Fiber Reinforced Mortar, Materials and Structures, 50(4), pp. 1-15, 2017.
Carreira, D.J. & Chu, K.H., Stress-strain Relationship for Plain Concrete in Compression, Journal of the American Concrete Institute, 82(6), pp. 797-804, 1985.
