Influence of fly ash on hydration compounds of high-volume fly ash concrete

M. Kanta Rao; Ch. N. Satish Kumar; M. Kanta Rao; Ch. N. Satish Kumar

doi:10.3934/matersci.2021020

AIMS Materials Science

2021, Volume 8, Issue 2: 301-320. doi: 10.3934/matersci.2021020

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Research article

Influence of fly ash on hydration compounds of high-volume fly ash concrete

M. Kanta Rao ^{1,2
,
,},
Ch. N. Satish Kumar ³

1.
Department of Civil Engineering, Acharya Nagarjuna University, Guntur, Andhra Pradesh 522510, India
2.
Department of Civil Engineering, V.R. Sidhartha Engineering College, Vijayawada, Andhra Pradesh, 520007, India
3.
Department of Civil Engineering, Bapatla Engineering College, Bapatla, Andhra Pradesh, 522102, India

Received: 22 February 2021 Accepted: 11 May 2021 Published: 14 May 2021

Development of sustainable materials has become one common goal across the globe to meet the ever-increasing demand for the construction materials. High volume fly ash (HVFA) concrete is one such sustainable construction material which utilizes fly ash in concrete as a partial replacement of cement. Though the existing literature focuses abundantly on high volume fly ash concrete, the present work aimed to explore the intricate hydration process thorough a systematic experimental program. A series of experiments including compressive strength, rapid chloride permeability, UPV, acid resistance, X-ray diffraction, SEM and EDAX were performed to examine the effect of varying proportions of fly ash (0%, 20%, 40%, 60%) on cement replacement. Analysis of results indicated formation of hydration compounds in the form of alite, belite, celite, portlandite and tobermorite (C-S-H gel). Results of mechanical and durability tests showed that, to achieve maximum benefits, cement can be replaced to an optimum value of fly ash of 40%. The authors believe that the formation of hydration compounds tobermorite and celite resulted in attaining enhanced durability and strength in high volume fly ash concrete.
- HVFA concrete,
- compressive strength,
- RCPT,
- UPV,
- acid resistance,
- X-ray diffraction (XRD) and energy dispersion spectroscopy,
- scanning electron microscopy
Citation: M. Kanta Rao, Ch. N. Satish Kumar. Influence of fly ash on hydration compounds of high-volume fly ash concrete[J]. AIMS Materials Science, 2021, 8(2): 301-320. doi: 10.3934/matersci.2021020

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Abstract

Development of sustainable materials has become one common goal across the globe to meet the ever-increasing demand for the construction materials. High volume fly ash (HVFA) concrete is one such sustainable construction material which utilizes fly ash in concrete as a partial replacement of cement. Though the existing literature focuses abundantly on high volume fly ash concrete, the present work aimed to explore the intricate hydration process thorough a systematic experimental program. A series of experiments including compressive strength, rapid chloride permeability, UPV, acid resistance, X-ray diffraction, SEM and EDAX were performed to examine the effect of varying proportions of fly ash (0%, 20%, 40%, 60%) on cement replacement. Analysis of results indicated formation of hydration compounds in the form of alite, belite, celite, portlandite and tobermorite (C-S-H gel). Results of mechanical and durability tests showed that, to achieve maximum benefits, cement can be replaced to an optimum value of fly ash of 40%. The authors believe that the formation of hydration compounds tobermorite and celite resulted in attaining enhanced durability and strength in high volume fly ash concrete.

References

[1]	Kumar M, Sinha AK, Kujur J (2021) Mechanical and durability studies on high‐volume fly‐ash concrete. Struct Concr 22: E1036-E1049.
[2]	Prakash R, Thenmozhi R, Raman SN, et al. (2020) Characterization of eco‐friendly steel fiber‐reinforced concrete containing waste coconut shell as coarse aggregates and fly ash as partial cement replacement. Struct Concr 21: 437-447. doi: 10.1002/suco.201800355
[3]	Rashad AM (2013) A comprehensive overview about the influence of different additives on the properties of alkali-activated slag—A guide for Civil Engineer. Constr Build Mater 47: 29-55. doi: 10.1016/j.conbuildmat.2013.04.011
[4]	Uzbaş B, Aydın AC (2019) Analysis of fly ash concrete with scanning electron microscopy and X-ray diffraction. Adv Sci Technol Res J 13: 100-110. doi: 10.12913/22998624/114178
[5]	Yu J, Li G, Leung CKY (2018) Hydration and physical characteristics of ultrahigh-volume fly ash-cement systems with low water/binder ratio. Constr Build Mate 161: 509-518. doi: 10.1016/j.conbuildmat.2017.11.104
[6]	Feng J, Sun J, Yan P (2018) The influence of ground fly ash on cement hydration and mechanical property of mortar. Adv Civ Eng 2018: 4023178.
[7]	Saha AK (2018) Effect of class F fly ash on the durability properties of concrete. Sustainable Environ Res 28: 25-31. doi: 10.1016/j.serj.2017.09.001
[8]	Chindaprasirt P, Chotithanorm C, Cao HT, et al. (2007) Influence of fly ash fineness on the chloride penetration of concrete. Constr Build Mater 21: 356-361. doi: 10.1016/j.conbuildmat.2005.08.010
[9]	Singh GVPB, Subramaniam KVL (2016) Concrete using siliceous fly ash at very high levels of cement replacement: Influence of lime content and temperature. 2nd RN Raikar Memorial International Conference and Banthia-Basheer International Symposium on Advances in Science and Technology of Concrete, Mumbai, India, 1-11.
[10]	Liu Z, Xu D, Zhang Y (2017) Experimental investigation and quantitative calculation of the degree of hydration and products in fly ash-cement mixtures. Adv Mater Sci Eng 2017: 2437270.
[11]	Atiş CD (2003) High-volume fly ash concrete with high strength and low drying shrinkage. J Mater Civil Eng 15: 153-156.
[12]	Plowman C, Cabrera JG (1996) The use of fly ash to improve the sulphate resistance of concrete. Waste Manage 16: 145-149. doi: 10.1016/S0956-053X(96)00055-4
[13]	Hemalatha T, Ramaswamy A (2017) A review on fly ash characteristics—Towards promoting high volume utilization in developing sustainable concrete. J Cleaner Prod 147: 546-559. doi: 10.1016/j.jclepro.2017.01.114
[14]	Hemalatha T, Mapa M, George N, et al. (2016) Physico-chemical and mechanical characterization of high volume fly ash incorporated and engineered cement system towards developing greener cement. J Cleaner Prod 125: 268-281. doi: 10.1016/j.jclepro.2016.03.118
[15]	Jung SH, Saraswathy V, Karthick S, et al. (2018) Microstructure characteristics of fly ash concrete with rice husk ash and lime stone powder. Int J Concr Struct Mater 12: 1-9. doi: 10.1186/s40069-018-0237-8
[16]	Patil RA, Zodape SP (2011) X-ray diffraction and sem investigation of solidification/stabilization of nickel and chromium using fly ash. E-J Chem 8: S395-S403.
[17]	Pyatina T, Sugama T (2016) Acid resistance of calcium aluminate cement-fly ash F blends. Adv Cem Res 28: 433-457. doi: 10.1680/jadcr.15.00139
[18]	Wang A, Zhang C, Sun W (2003) Fly ash effects: I. The morphological effect of fly ash. Cement Concrete Res 33: 2023-2029.
[19]	Donatello S, Palomo A, Fernández-Jiménez A (2013) Durability of very high volume fly ash cement pastes and mortars in aggressive solutions. Cem Concr Compos 38: 12-20. doi: 10.1016/j.cemconcomp.2013.03.001
[20]	Garcia-Lodeiro I, Fernandez-Jimenez A, Palomo A (2013) Hydration kinetics in hybrid binders: Early reaction stages. Cem Concr Compos 39: 82-92. doi: 10.1016/j.cemconcomp.2013.03.025
[21]	Wang A, Zhang C, Sun W (2004) Fly ash effects: Ⅲ. The microaggregate effect of fly ash. Cement Concrete Res 34: 2061-2066.
[22]	De Weerdt K, Haha MB, Le Saout G, et al. (2011) Hydration mechanisms of ternary Portland cements containing limestone powder and fly ash. Cement Concrete Res 41: 279-291. doi: 10.1016/j.cemconres.2010.11.014
[23]	Tang SW, Cai XH, He Z, et al. (2016) Hydration process of fly ash blended cement pastes by impedance measurement. Constr Build Mater 113: 939-950. doi: 10.1016/j.conbuildmat.2016.03.141
[24]	Kayali O (2004) Effect of high volume fly ash on mechanical properties of fiber reinforced concrete. Mater Struct 37: 318-327.
[25]	Siddique R (2004) Performance characteristics of high-volume Class F fly ash concrete. Cement Concrete Res 34: 487-493. doi: 10.1016/j.cemconres.2003.09.002
[26]	IS 516-1959 (reaffirmed 2004): Indian Standard Methods of Tests for Strength of Concrete. BIS, 1999. Available form: https://www.iitk.ac.in/ce/test/IS-codes/is.516.1959.pdf.
[27]	ASTM C1202-12, Standard Test Method for Electrical Indication of Concrete's Ability to Resist Chloride Ion Penetration. ASTM International, 2012. Available form https://www.astm.org/DATABASE.CART/HISTORICAL/C1202-12.htm.

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