Effect of Hybrid Fibers on Fresh Properties, Mechanical Properties, and Autogenous Shrinkage of Cost-Effective UHPC
Publication: Journal of Materials in Civil Engineering
Volume 30, Issue 4
Abstract
This paper investigates the effects of hybrid micro-macro steel and micro steel blended with synthetic fibers and of the fiber content on key properties of a cost-effective ultrahigh-performance concrete (UHPC). Eleven mixtures are prepared using three types of fibers: micro steel straight fibers (SF), macro steel hooked-end fibers (HF), and polyvinyl alcohol (PVA) fibers. The fiber content of SF is increased from 0 to 5%. At a fiber content of 2%, different combinations of micro-macro steel and micro steel-PVA fibers are considered. The minislump flow of all mixtures is fixed to by adjusting the high-range water reducer (HRWR) dosage to ensure self-consolidating characteristics. The investigated properties include the HRWR demand, plastic viscosity, compressive strengths, tensile and flexural properties, and autogenous shrinkage. The plastic viscosity increases with the steel fiber content. At a fiber content of 2%, increasing the content of PVA or HF increases the plastic viscosity. Compared with the reference UHPC mixture made with 2% SF, the incorporation of 1% SF and 1% HF increases the flexural strength, toughness, and tensile strength by approximately 25, 30, and 20%, respectively, and reduces the autogenous shrinkage by 25%. The addition of 1.5% SF and 0.5% PVA increases the flexural strength and toughness by 10 and 15%, respectively, and decreases autogenous shrinkage by 40%. Increasing the SF content from 2 to 5% does not significantly improve the flexural properties, but notably reduces autogenous shrinkage.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
This research was funded by RE-CAST Tier-1 University Transportation Center at Missouri University of Science and Technology (Grant No. DTRT13-G-UTC45) and the Energy Consortium Research Center at Missouri Science and Technology (Grant No. SMR-1406-09).
References
ASTM. (2006). “Standard test method for flexural performance of fiber-reinforced concrete (using beam with third-point loading).” ASTM C1609, West Conshohocken, PA.
ASTM. (2008). “Standard specification for flow table for use in tests of hydraulic cement.” ASTM C230, West Conshohocken, PA.
ASTM. (2009). “Standard test method for autogenous strain of cement paste and mortar.” ASTM C1698, West Conshohocken, PA.
ASTM. (2013). “Standard test method for compressive strength of hydraulic cement mortars (using 50 mm cube specimens).” ASTM C109, West Conshohocken, PA.
Bao, Y., Meng, W., Chen, Y., Chen, G., and Khayat, K. H. (2015). “Measuring mortar shrinkage and cracking by pulse pre-pump Brillouin optical time domain analysis with a single optical fiber.” Mater. Lett., 145, 344–346.
Behloul, M., Bernier, G., and Cheyrezy, M. (1996). “Tensile behavior of reactive powder concrete (RPC).” Proc., 4th Int. Symp. on Utilization of HSC/HPC, Vol. 96, Laboratories des Ponts et Chaussées, Paris, 1375–1381.
Benson, S. D., and Karihaloo, B. L. (2005). “CARDIFRC®—Development and mechanical properties. Part III: Uniaxial tensile response and other mechanical properties.” Mag. Concr. Res., 57(8), 433–443.
Bischoff, P. H. (2003). “Tension stiffening and cracking of steel fiber-reinforced concrete.” J. Mater. Civ. Eng., 174–182.
Boulekbache, B., Hamrat, M., Chemrouk, M., and Amziane, S. (2010). “Flowability of fibre-reinforced concrete and its effect on the mechanical properties of the material.” Constr. Build. Mater., 24(9), 1664–1671.
Bouziadi, F., Boulekbache, B., and Hamrat, M. (2016). “The effects of fibres on the shrinkage of high-strength concrete under various curing temperatures.” Constr. Build. Mater., 40–48.
EFNARC (European Federation of National Associations Representing producers and applicators of specialist building products for Concrete). (2002). “Specification and guidelines for self-compacting concrete.” Norfolk, U.K.
Grünewald, S., and Walraven, J. C. (2001). “Parameter-study on the influence of steel fibers and coarse aggregate content on the fresh properties of self-compacting concrete.” Cem. Concr. Res., 31(12), 1793–1798.
Hannawi, K., Bian, H., Prince-Agbodjan, W., and Raghavan, B. (2016). “Effect of different types of fibers on the microstructure and the mechanical behavior of ultra-high performance fiber-reinforced concretes.” Compos. B., 86, 214–220.
Kang, S. T., Choi, J. I., Koh, K. T., Lee, K. S., and Lee, B. Y. (2016). “Hybrid effects of steel fiber and microfiber on the tensile behavior of ultra-high performance concrete.” Compos. Struct., 145, 37–42.
Khayat, K. H., Kassimi, F., and Ghoddousi, P. (2014). “Mixture design and testing of fiber-reinforced self-consolidating concret.” ACI Mater. J., 111(2), 143–152.
Kwon, S., Nishiwaki, T., Kikuta, T., and Mihashi, H. (2014). “Development of ultra-high-performance hybrid fiber-reinforced cement-based composites.” ACI Mater. J., 111(3), 309–318.
Lawler, J. S., Zampini, D., and Shah, S. P. (2005). “Microfiber and macrofiber hybrid fiber-reinforced concrete” J. Mater. Civ. Eng., 595–604.
Martinie, L., Rossi, P., and Roussel, N. (2010). “Rheology of fiber reinforced cementitious materials: Classification and prediction.” Cem. Concr. Res., 40(2), 226–234.
Meng, W., and Khayat, K. H. (2016a). “Experimental and numerical studies on flexural behavior of ultra-high performance concrete panels reinforced with embedded glass fiber-reinforced polymer grids.” Transp. Res. Rec., 2592, 38–44.
Meng, W., and Khayat, K. H. (2016b). “Mechanical properties of ultra-high-performance concrete enhanced with graphite nanoplatelets and carbon nanofibers.” Compos. B, 107, 113–122.
Meng, W., and Khayat, K. H. (2017). “Improving flexural performance of ultra-high-performance concrete by rheology control of suspending mortar.” Compos. B, 117, 26–34.
Meng, W., Valipour, M., and Khayat, K. (2017). “Optimization and performance of cost-effective ultra-high performance concrete.” Mater. Struct., 50(1), 29.
Mihashi, H., and Kohno, Y. (2007). “Toughening mechanism of hybrid fiber reinforced cement composites.” 6th Int. Conf. on Fracture Mechanics of Concrete and Concrete Structures, Vol. 3, CRC Press, Boca Raton, FL, 1329–1339.
Park, S. H., Kim, D. J., Ryu, G. S., and Koh, K. T. (2012). “Tensile behavior of ultra high performance hybrid fiber reinforced concrete.” Cem. Concr. Compos., 34(2), 172–184.
Passuello, A., Moriconi, G., and Shah, S. P. (2009). “Cracking behavior of concrete with shrinkage reducing admixtures and PVA fibers.” Cem. Concr. Compos., 31(10), 699–704.
Perry, V. H., and Weiss, G. (2009). “Innovative field cast UHPC joints for precast bridge decks—Design prototype testing and projects.” AFGC—Designing and building with UHPFRC: State of the art and development, Marseille, France, 421–436.
Resplendino, J. (2012). “State of the art of design and construction of UHPFRC structures in France.” Proc., Hipermat, Kassel University Press, Kassel, Germany, 27–41.
RILEM. (2002). “Test and design methods for steel fiber reinforced concrete-bending test.” Mater. Struct., 35, 579–582.
Sun, W., Chen, H., Luo, X., and Qian, H. (2001). “The effect of hybrid fibers and expansive agent on the shrinkage and permeability of high-performance concrete.” Cem. Concr. Res., 31(4), 595–601.
Swamy, R. N., and Mangat, P. S. (1974). “Influence of fibre-aggregate interaction on some properties of steel fibre reinforced concrete.” Mater. Struct., 7(5), 307–314.
Wee, T. H., Babu, D. S., Tamilselvan, T., and Lim, H. S. (2006). “Air-void system of foamed concrete and its effect on mechanical properties.” ACI Mater. J., 103(1), 45–52.
Wille, K., Kim, D. J., and Naaman, A. E. (2011). “Strain-hardening UHP-FRC with low fiber contents.” Mater. Struct., 44(3), 583–598.
Yoo, D. Y., and Banthia, N. (2016). “Mechanical properties of ultra-high-performance fiber-reinforced concrete: A review.” Cem. Concr. Compos., 73, 267–280.
Yoo, D. Y., Lee, J. H., and Yoon, Y. S. (2013a). “Effect of fiber content on mechanical and fracture properties of ultra high performance fiber reinforced cementitious composites.” Compos. Struct., 106, 742–753.
Yoo, D. Y., Park, J. J., Kim, S. W., and Yoon, Y. S. (2013b). “Early age setting, shrinkage and tensile characteristics of ultra high performance fiber reinforced concrete.” Const. Build. Mater., 41, 427–438.
Information & Authors
Information
Published In
Copyright
©2018 American Society of Civil Engineers.
History
Received: Apr 26, 2017
Accepted: Sep 20, 2017
Published online: Jan 18, 2018
Published in print: Apr 1, 2018
Discussion open until: Jun 18, 2018
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.