Study of Effect of Nano-Silica on Strength and Durability Characteristics of High Volume Fly Ash Concrete for Pavement Construction
Increasing demands of cement concrete for construction of rigid pavements motivates for the utilization of other sustainable waste cementitious materials. High volume fly-ash concrete (HVFAC) which is composed of more than 50% fly-ash fulfils the aspiration of large volume of fly-ash which are produced world over. The disadvantage which the HVFAC has is its delayed gain of strength. Contemporary literature identifies nano-silica as the material which when added in small percentages in HVFAC has the potential to improve its strength and durability characteristics at an early age. The objective of the study is to investigate the strength and durability characteristics of HVFAC modified with addition of different percentages of nano-silica so that it can be used for construction of rigid pavements. The methodology of the study involves mix proportioning of HVFAC and introducing nano-silica powder in aqueous medium after mixing it thoroughly at 2500 rpm. Various tests related to strength and durability was carried out after 28, 56 and 90 days age of concrete. The tests related to strength namely flexural strength, compressive strength and split tensile strength tests were carried out. Durability characteristics were evaluated by permeability, sorptivity and rapid chloride penetration tests and were confirmed by density and ultrasonic pulse velocity test. The test results show that the utilization of 2% nano-silica in HVFAC enhances the strength and durability characteristics to a level that are comparable to that of normal concrete after 28 days and thus, can be sustainably utilized for rigid pavement construction.
M.L Gambhir., Concrete Technology, Tata McGraw-Hill publishing Company Ltd., New Delhi, 2013.
World Business Council for Sustainable Development, Cement technology roadmap shows how the path to achieve CO2 reductions up to 24 by 2050, https://www.wbcsd.org/Sector-Projects/Cement-Sustainability-Initiative/News/Cement-technology-roadmap-shows-how-the-path-to-achieve-CO2-reductions-up-to-24-by-2050.
The Statistics Portal, Major countries in worldwide cement production from 2012 to 2017 (in million metric tons), https://www.statista.com/statistics/267364/world-cement-production-by-country.
National Thermal Power Corporation (NTPC), Fly Ash: A Resource Material for Construction Sector, NTPC Ash Management Group, 2016, Noida, India.
P. K Mehta, High Performance, High Volume Fly Ash Concrete for Sustainable Development, Proceedings of International Workshop on Sustainable development and Concrete Technology, Ottawa, Canada, 2002, pp 3-14
V. Sivasundaram, G. G. Carette, and V. M. Malhotra, Properties of Concrete Incorporating Low Quantity of Cement and High Volumes of Low-Calcium Fly Ash, ACI, SP-114, 1989, pp. 45-71.
S.H. Gebler and P. Kliger, Effect of Flyash on Physical Properties of Concrete, ACI, SP-91, 1986, pp 1-50.
B. Kumar, G.K. Tike & P.K. Nanda, Evaluation of Properties of High Volume Concrete for Pavements, ASCE, Journal of Materials in Civil Engineering, Oct. 2007, pp 906-911 doi:10.1061/(ASCE)0899-1561(2007)19:10(906).
K. Gopalakrishnan, B. Birgisson, P. Taylor & N. Attoh-Okine, Nano-technology in Civil Infrastruture A Paradigm Shift, Springer Publications, 2010.
B. Birgisson, A. K. Mukhopadhyay, G. Geary, M. Khan & K. Sobolev, Nanotechnology in Concrete Materials, Transportation Research Board, Transportation Research Circular E-C170, 2012, Washington D.C.
T. Ji, Preliminary study on the water permeability and microstructure of concrete incorporating nano-SiO2, Cement and Concrete Research, 35(2005), 1943-1947. doi:10.1016/j.cemconres.2005.07.004.
M. Zhang & H. Li, Pore structure and chloride permeability of concrete containing nano-particles for pavement, Construction & Building materials, 25 (2011), 608-616. doi:10.1016/j.conbuildmat.2010.07.032.
Lin, D.F., K.L. Lin, W.C. Chang, H.L. Luo, and M.Q. Cai. “Improvements of Nano-SiO2 on Sludge/fly Ash Mortar.” Waste Management 28, no. 6 (2008): 1081–1087. doi:10.1016/j.wasman.2007.03.023.
K. Sobolev, I. Flores & R. Hermosillo, Nanomaterials and nanotechnology for high performance cement composites, Proceedings of ACI Session on Nanotechnology of Concrete: Recent Developments and Future Perspectives, Nov. 7, 2006, pp. 91-118, Denever, U.S.A.
Z Rong., W. Sun, H. Xiao & G. Ziang, Effects of nanio-SiO2 particles on the mechanical and microstructural properties of ultra-High performance cementitious composites, Cement & Concrete Composites, 56 (2015), 25-31. doi: 10.1016/j.cemconcomp.2014.11.001.
G. Quercia, P. Spiesz, G. Husken & H.J.H. Brouwers, SCC modification by use of amorphous nano-silica, Cement & Concrete Composites, 45 (2014), 69-81. doi:10.1016/j.cemconcomp.2013.09.001.
R. Madandoust, E. Mohseni, S.Y. Mousavi & M. Namnevis, An experimental investigation on the durability of self-compacting mortar containing nano-SiO2, Nano-Fe2O3 and nano-CuO, Construction and Building Materials, 86 (2015), 44-50, doi: 10.1016/j.conbuildmat.2015.03.100.
S.W.M Supit & F. U. A. Shaikh, Durability Properties of High Volume Fly ash Concrete Containing Nano-Silica, MaterialsandStructures, 2015, 48:2431-2445. doi:10.1617/s11527-014-0329-0.
Ehsani, Ahmad, Mahmoud Nili, and Keyvan Shaabani. “Effect of Nanosilica on the Compressive Strength Development and Water Absorption Properties of Cement Paste and Concrete Containing Fly Ash.” KSCE Journal of Civil Engineering 21, no. 5 (December 26, 2016): 1854–1865. doi:10.1007/s12205-016-0853-2.
Labaj, Martin, Rudolf Hela, and Iveta Hájková. “Nanosilica Activated High Volume Fly Ash Concrete: Effects on Selected Properties.” Key Engineering Materials 722 (December 2016): 157–162. doi:10.4028/www.scientific.net/kem.722.157.
Roychand, Rajeev, Saman De Silva, and Sujeeva Setunge. “Nanosilica Modified High-Volume Fly Ash and Slag Cement Composite: Environmentally Friendly Alternative to OPC.” Journal of Materials in Civil Engineering 30, no. 4 (April 2018): 04018043. doi:10.1061/(asce)mt.1943-5533.0002220.
Sun, Jinfeng, Xiaodong Shen, Gang Tan, and Jennifer E. Tanner. “Modification Effects of Nano-SiO2 on Early Compressive Strength and Hydration Characteristics of High-Volume Fly Ash Concrete.” Journal of Materials in Civil Engineering 31, no. 6 (June 2019): 04019057. doi:10.1061/(asce)mt.1943-5533.0002665.
Liu, Min, Hongbo Tan, and Xingyang He. “Effects of Nano-SiO2 on Early Strength and Microstructure of Steam-Cured High Volume Fly Ash Cement System.” Construction and Building Materials 194 (January 2019): 350–359. doi:10.1016/j.conbuildmat.2018.10.214.
Mohamed, Anwar M. “Influence of Nano Materials on Flexural Behavior and Compressive Strength of Concrete.” HBRC Journal 12, no. 2 (August 2016): 212–225. doi:10.1016/j.hbrcj.2014.11.006.
Torabian Isfahani, Forood, Elena Redaelli, Federica Lollini, Weiwen Li, and Luca Bertolini. “Effects of Nanosilica on Compressive Strength and Durability Properties of Concrete with Different Water to Binder Ratios.” Advances in Materials Science and Engineering 2016 (2016): 1–16. doi:10.1155/2016/8453567.
- There are currently no refbacks.
Copyright (c) 2019 Bimal Kumar, Sanjeev Sinha, Hillol Chakravarty
This work is licensed under a Creative Commons Attribution 4.0 International License.