Laboratory and Field Evaluation of Stabilized Fly Ash as an Alternative Material for Sustainable Pavements
Publication: Journal of Hazardous, Toxic, and Radioactive Waste
Volume 26, Issue 4
Abstract
Thermal power plants in India produce a large quantity of fly ash, which is harmful to the environment. Underutilization of fly ash and the scarcity of natural minerals have created the need for an unusual construction strategy to prevent huge waste dumps on valuable land and to preserve fast-depleting resources. A study was conducted to determine the efficacy of lime-stabilized fly ash blended with quarry fines as flexible pavement subbase materials. The laboratory investigations were conducted to determine compaction characteristics, unconfined compressive strength, California bearing ratio (CBR), and durability to obtain the optimal quarry fines, fly ash, and lime (QFL) mix. The durability of QFL mixes was studied using 12 wetting–drying cycles. Using the strength and durability criteria specified by the Indian Road Congress, the optimum mix proportion of 40Q:60F+3L was determined. Pavement analyses were performed using the IITPAVE program. The QFL mix was observed to be superior to conventional granular subbase (GSB) layer material in terms of service life and cost-effectiveness. A field investigation was carried out on trial test sections constructed using the optimum QFL mix and GSB in the subbase layer of pavement. Field dry density and dynamic cone penetrometer (DCP) tests were performed on the compacted subgrade and subbase layers to assess the desired quality assurance in the construction of test sections. The early structural performance assessment of pavement sections using a falling weight deflectometer (FWD) test indicated that QFL could effectively replace conventional GSB.
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Acknowledgments
The test section execution work was supported by the Public Works Department, Nashik, Government of Maharashtra, India.
References
Arulrajah, A., J. Piratheepan, T. Aatheesan, and M. W. Bo. 2011. “Geotechnical properties of recycled crushed brick in pavement applications.” J. Mater. Civ. Eng. 23 (10): 1444–1452. https://doi.org/10.1061/(ASCE)MT.1943-5533.0000319.
Arulrajah, A., J. Piratheepan, and M. M. Disfani. 2014. “Reclaimed asphalt pavement and recycled concrete aggregate blends in pavement subbases: Laboratory and field evaluation.” J. Mater. Civ. Eng. 26 (2): 349–357. https://doi.org/10.1061/(ASCE)MT.1943-5533.0000850.
ASTM. 2003. Standard test method for use of the dynamic cone penetrometer in shallow pavement applications. ASTM D6951. West Conshohocken, PA: ASTM.
ASTM. 2009. Standard test methods for unconfined compressive strength of compacted soil-lime mixtures. ASTM D5102. West Conshohocken, PA: ASTM.
ASTM. 2010. Standard specification for coal fly ash and raw or calcined natural pozzolan for use as a mineral admixture in concrete. ASTM C618. West Conshohocken, PA: ASTM.
ASTM. 2012. Standard test methods for laboratory compaction characteristics of soil using modified effort. ASTM D1557. West Conshohocken, PA: ASTM.
ASTM. 2015. Standard test methods for wetting and drying compacted soilcement mixtures. ASTM D559. West Conshohocken, PA: ASTM.
Bakare, M. D., R. R. Pai, S. Patel, and J. T. Shahu. 2019. “Environmental sustainability by bulk utilization of fly ash and GBFS as road subbase materials.” J. Hazard. Toxic Radioact. Waste 23 (4): 1–10. https://doi.org/10.1061/(ASCE)HZ.2153-5515.0000450.
BIS (Bureau of Indian Standards). 1990. Methods of sampling and test for quick lime and hydrated lime. IS1514. New Delhi, India: BIS.
BIS (Bureau of Indian Standards). 2005. Methods of test for soils: Part 28 determination of dry density of soils, in – Place, by the sand replacement method. IS 2720 Part 28. New Delhi, India: BIS.
BIS (Bureau of Indian Standards). 2011. Indian standard method of test for soil part 16 laboratory determination of CBR. IS 2720 Part 16, (Reaffirmed). New Delhi, India: BIS.
CEA (Central Electricity Authority). 2020. Report on fly ash generation at coal/lignite based thermal power stations and its utilization in the country for the year 2018–19. http://www.cea.nic.in/ New Delhi, India: CEA.
Consoli, N. C., A. D. Rosa, and R. B. Saldanha. 2011. “Variables governing strength of compacted soil–fly ash–lime mixtures.” J. Mater. Civ. Eng. 23 (4): 432–440. https://doi.org/10.1061/(ASCE)MT.1943-5533.0000186.
Ghosh, A., and C. Subbarao. 2007. “Strength characteristics of class F fly ash modified with lime and gypsum.” J. Geotech. Geoenviron. Eng. 133 (7): 757–766. https://doi.org/10.1061/(ASCE)1090-0241(2007)133:7(757).
Horpibulsuk, S., C. Phetchuay, and A. Chinkulkijniwat. 2012. “Soil stabilization by calcium carbide residue and fly ash.” J. Mater. Civ. Eng. 24 (2): 184–193. https://doi.org/10.1061/(ASCE)MT.1943-5533.0000370.
IRC (Indian Road Congress). 1992. Guideline for use of soil lime mixes in road construction. New Delhi, India: IRC.
IRC (Indian Road Congress). 2012. Tentative guidelines for the design of flexible pavements. New Delhi, India: IRC.
IRC (Indian Road Congress). 2014. Structural evaluation and strengthening of flexible road pavements using falling weight deflectometer (FWD) technique. New Delhi, India: IRC.
Li, L., C. H. Benson, T. B. Edil, B. Hatipoglu, and O. Tastan. 2007. “Evaluation of recycled asphalt pavement material stabilized with fly ash.” In Soil and Material Inputs for Mechanistic-Empirical Pavement Design, Geotechnical Special Publication 169, edited by E. Tutumluer, L. Tashman, and H. Ceylan, 1–10. Reston, VA: ASCE.
Mohammadinia, A., A. Arulrajah, J. Sanjayan, M. M. Disfani, M. W. Bo, and S. Darmawan. 2015. “Laboratory evaluation of the use of cement-treated construction and demolition materials in pavement base and subbase applications.” J. Mater. Civ. Eng. 27 (6): 1–12. https://doi.org/10.1061/(ASCE)MT.1943-5533.0001148.
MORTH (Ministry of Road Transport and Highways). 2013. Specifications for road and bridge work. New Delhi, India: MORTH.
Pai, R. R., A. M. Asce, M. D. Bakare, S. Patel, and J. T. Shahu. 2021. “Structural evaluation of flexible pavement constructed with steel slag-fly ash-lime mix in the base layer.” J. Mater. Civ. Eng. 33 (6): 04021097. https://doi.org/10.1061/(ASCE)MT.1943-5533.0003711.
Patel, D., R. Kumar, K. Chauhan, and S. Patel. 2019. “Effects of stabilization on engineering characteristics of fly ash as pavement subbase material.” In Geotechnics for transportation infrastructure, edited by R. Sundaram, J. Shahu, and V. Havanagi, 127–137. Lecture Notes in Civil Engineering. Singapore: Springer.
Patel, S., and J. T. Shahu. 2015. “Engineering properties of black cotton soil-dolime mix for its use as subbase material in pavements.” Int. J. GEOMATE 8 (1): 1159–1166.
Patel, S., and J. T. Shahu. 2016. “Resilient response and permanent strain of steel slag-fly ash-dolime mix.” J. Mater. Civ. Eng. 28 (10): 1–11. https://doi.org/10.1061/(ASCE)MT.1943-5533.0001619.
Patel, S., and J. T. Shahu. 2017. “Comparative study of slags stabilized with fly ash and dolime for utilization in base course.” J. Mater. Civ. Eng. 29 (10): 1–8. https://doi.org/10.1061/(ASCE)MT.1943-5533.0002017.
Patel, S., and J. T. Shahu. 2018. “Comparison of industrial waste mixtures for use in subbase course of flexible pavements.” J. Mater. Civ. Eng. 30 (7): 1–10. https://doi.org/10.1061/(ASCE)MT.1943-5533.0002320.
Puppala, A. J., S. Saride, and R. Williammee. 2012. “Sustainable reuse of limestone quarry fines and RAP in pavement base/subbase layers.” J. Mater. Civ. Eng. 24 (4): 418–429. https://doi.org/10.1061/(ASCE)MT.1943-5533.0000404.
Qamhia, I., J. Cheung, and W. Hou. 2016. “Gradation effects on the strength properties of cement and fly ash stabilized quarry by-products.” Geo-Chicago GSP 270: 610–620.
Qamhia, I. I. A., E. Tutumluer, H. Ozer, H. Shoup, S. Beshears, J. Trepanier, H. Boler, H. Shoup, A. J. Stolba, and P. Solanki. 2020. “Mechanistic analyses and modeling of pavement sections utilizing sustainable aggregate quarry by-product applications.” Transp. Res. Rec. 2674 (3): 259–270.
Saride, S., D. Avirneni, and S. C. P. Javvadi. 2016. “Utilization of reclaimed asphalt pavements in Indian low-volume roads.” J. Mater. Civ. Eng. 28 (2): 1–10. https://doi.org/10.1061/(ASCE)MT.1943-5533.0001374.
Shahu, J. T., S. Patel, and A. Senapati. 2013. “Engineering properties of copper slag-fly ash-dolime mix and its utilization in the base course of flexible pavements.” J. Mater. Civ. Eng. 25 (12): 1871–1879. https://doi.org/10.1061/(ASCE)MT.1943-5533.0000756.
USEPA. 1992. Toxicity characteristic leaching procedure. SW 846, Method-1311. Washington, DC: USEPA.
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Received: Jan 31, 2022
Accepted: May 17, 2022
Published online: Jul 20, 2022
Published in print: Oct 1, 2022
Discussion open until: Dec 20, 2022
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