https://orcid.org/0000-0001-8083-554X
Abstract
Unused Class C fly ash has been disposed of in large impoundments or landfills for many decades. Reclamation and use of this material in concrete could provide a solution to environmental challenges and alleviate shortages of fresh fly ash in some locations. This research study investigated beneficiation and the use of harvested Class C fly ash as a supplementary cementitious material (SCM) at different replacement percentages of portland cement. The reactivities of three different sources of harvested Class C fly ash were evaluated with different amounts of grinding at low and high temperature curing. Isothermal calorimetry, the R3 method, strength activity index, the modified lime-pozzolan strength test, thermogravimetric analysis, and quantitative x-ray diffraction were used to analyze the physicochemical, mineralogical, and hydration kinetics properties of the harvested ashes. While harvested Class C fly ash showed great potential for use in concrete as an SCM, limits on loss on ignition may be helpful in limiting the calcium carbonate content and giving good performance at temperatures higher than laboratory temperatures.
Issue Section:
Technical Papers
References
1.
EPA
Technical Background Document for the Report to Congress on Remaining Wastes from Fossil Fuel Combustion: Industry Statistics and Waste Management Practices
(Washington, DC
: United States Environmental Protection Agency
, 1999
), https://web.archive.org/web/20170508135759/https://archive.epa.gov/epawaste/nonhaz/industrial/special/fossil/web/pdf/ffc2_398.pdf2.
EPA “
Coal Ash Reuse
,” United States Environmental Protection Agency, 2022
, https://web.archive.org/web/20220322170727/https://www.epa.gov/coalash/coal-ash-reuse3.
Rosalyn Berry “
U.S. Electric Power Industry Produces Less and Recycles More Combustion By-Product
,” U.S. Energy Information Administration, 2021
, https://web.archive.org/web/20210604110416/https://www.eia.gov/todayinenergy/detail.php?id=473364.
Diaz-Loya
I.
, Juenger
M.
, Seraj
S.
, and Minkara
R.
, “Extending Supplementary Cementitious Material Resources: Reclaimed and Remediated Fly Ash and Natural Pozzolans
,” Cement and Concrete Composites
101
(August 2019
): 44
–51
, https://doi.org/10.1016/j.cemconcomp.2017.06.0115.
Enders
M.
, “Microanalytical Characterization (AEM) of Glassy Spheres and Anhydrite from a High-Calcium Lignite Fly Ash from Germany
,” Cement and Concrete Research
25
, no. 6
(August 1995
): 1369
–1377
, https://doi.org/10.1016/0008-8846(95)00129-Z6.
Ahmaruzzaman
M.
, “A Review on the Utilization of Fly Ash
,” Progress in Energy and Combustion Science
36
, no. 3
(June 2010
): 327
–363
, https://doi.org/10.1016/J.PECS.2009.11.0037.
Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete
, ASTM C618-19 (West Conshohocken, PA: ASTM International
, approved January 1, 2019
), https://doi.org/10.1520/C0618-198.
Ward
C. R.
and French
D.
, “Relation between Coal and Fly Ash Mineralogy, Based on Quantitative X-ray Diffraction Methods
” (paper presentation, 2005 World of Coal Ash [WOCA], Lexington, KY, April 11–15, 2005
).9.
Snellings
R.
and Scrivener
K. L.
, “Rapid Screening Tests for Supplementary Cementitious Materials: Past and Future
,” Materials and Structures
49
, no. 8
(October 2015
): 3265
–3279
, https://doi.org/10.1617/s11527-015-0718-z10.
Kasaniya
M.
, Alaibani
A.
, Thomas
M. D. A.
, and Riding
K. A.
, “Exploring the Efficacy of Emerging Reactivity Tests in Screening Pozzolanic Materials
,” Construction and Building Materials
325
(March 2022
): 126781, https://doi.org/10.1016/j.conbuildmat.2022.12678111.
Li
X.
, Snellings
R.
, Antoni
M.
, Alderete
N. M.
, Haha
M. B.
, Bishnoi
S.
, Cizer
Ö.
, et al., “Reactivity Tests for Supplementary Cementitious Materials: RILEM TC 267-TRM Phase 1
,” Materials and Structures
51
, no. 6
(December 2018
): 151, https://doi.org/10.1617/s11527-018-1269-x12.
Avet
F.
, Snellings
R.
, Diaz
A. A.
, Haha
M. B.
, and Scrivener
K.
, “Development of a New Rapid, Relevant and Reliable (R3) Test Method to Evaluate the Pozzolanic Reactivity of Calcined Kaolinitic Clays
,” Cement and Concrete Research
85
(July 2016
): 1
–11
, https://doi.org/10.1016/j.cemconres.2016.02.01513.
Yeheyis
M. B.
, Shang
J. Q.
, and Yanful
E. K.
, “Chemical and Mineralogical Transformations of Coal Fly Ash after Landfilling
” (paper presentation, 2009 World of Coal Ash [WOCA], Lexington, KY, January, 2005
).14.
Wirth
X.
, Glatstein
D. A.
, and Burns
S. E.
, “Mineral Phases and Carbon Content in Weathered Fly Ashes
,” Fuel
236
(January 2019
): 1567
–1576
, https://doi.org/10.1016/J.FUEL.2018.09.10615.
Akinyemi
S. A.
, Akinlua
A.
, Gitari
W. M.
, Khuse
N.
, Eze
P.
, Akinyeye
R. O.
, and Petrik
L. F.
, “Natural Weathering in Dry Disposed Ash Dump: Insight from Chemical, Mineralogical and Geochemical Analysis of Fresh and Unsaturated Drilled Cores
,” Journal of Environmental Management
102
(July 2012
): 96
–107
, https://doi.org/10.1016/J.JENVMAN.2011.11.01816.
Standard Specification for Portland Cement
, ASTM C150 (West Conshohocken: ASTM International
, approved July 1, 2022
), https://doi.org/10.1520/C0150_C0150M-2017.
Standard Test Method for Determination of the Proportion of Phases in Portland Cement and Portland-Cement Clinker Using X-ray Powder Diffraction Analysis
, ASTM C1365 (West Conshohocken, PA: ASTM International
, approved March 1, 2018
), https://doi.org/10.1520/C1365-1818.
Standard Specification for Standard Sand
, ASTM C778 (West Conshohocken: ASTM International
, approved December 1, 2021
), https://doi.org/10.1520/C0778-2119.
Standard Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency
, ASTM C305 (West Conshohocken, PA: ASTM International
, approved July 15, 2020
), https://doi.org/10.1520/C0305-2020.
Standard Test Methods for Sampling and Testing Fly Ash or Natural Pozzolans for Use in Portland-Cement Concrete
, ASTM C311 (West Conchohocken, PA: ASTM International
, approved February 1, 2022
), https://doi.org/10.1520/C0311_C0311M-2221.
Kasaniya
M.
, Thomas
M. D. A.
, and Moffatt
E. G.
, “Development of Rapid and Reliable Pozzolanic Reactivity Test Method
,” ACI Materials Journal
116
, no. 4
(July 2019
): 145
–154
, https://doi.org/10.14359/5171671822.
Standard Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube Specimens)
, ASTM C109 (West Conchohocken, PA: ASTM International
, approved January 15, 2020
), https://doi.org/10.1520/C0109_C0109M-2023.
Wadsö
L.
, Winnefeld
F.
, Riding
K.
, and Sandberg
P.
, “Calorimetry
,” in A Practical Guide to Microstructural Analysis of Cementitious Materials
, 1st ed, ed. Scrivener
K.
, Snellings
R.
, and Lothenbach
B.
(Boca Raton, FL
: CRC Press
, 2017
), 37
–74
, https://doi.org/10.1201/b1907424.
Standard Practice for Measuring Hydration Kinetics of Hydraulic Cementitious Mixtures Using Isothermal Calorimetry
, ASTM C1679 (West Conchohocken, PA: ASTM International
, approved December 1, 2017
), https://doi.org/10.1520/C1679-1725.
Standard Test Method for Thermogravimetric Analysis of Hydraulic Cement
, ASTM C1872 (West Conchohocken, PA: ASTM International
, approved December 1, 2017
), https://doi.org/10.1520/C1872-1826.
Lothenbach
B.
, Durdziński
P.
, and de Weerdt
K.
, “Thermogravimetric Analysis
,” in A Practical Guide to Microstructural Analysis of Cementitious Materials
, 1st ed, ed. Scrivener
K.
, Snellings
R.
, and Lothenbach
B.
(Boca Raton, FL
: CRC Press
, 2017
), 177
–212
, https://doi.org/10.1201/b1907427.
Scrivener
K. L.
, Füllmann
T.
, Gallucci
E.
, Walenta
G.
, and Bermejo
E.
, “Quantitative Study of Portland Cement Hydration by X-ray Diffraction/Rietveld Analysis and Independent Methods
,” Cement and Concrete Research
34
, no. 9
(September 2004
): 1541
–1547
, https://doi.org/10.1016/J.CEMCONRES.2004.04.01428.
Joshi
R. C.
, “Pozzolanic Reactions in Synthetic Fly Ashes
” (PhD diss., Iowa State University
, 1970
).29.
Mishra
G.
, Emmanuel
A. C.
, and Bishnoi
S.
, “Influence of Temperature on Hydration and Microstructure Properties of Limestone-Calcined Clay Blended Cement
,” Materials and Structures
52
, no. 5
(October 2019
): 91, https://doi.org/10.1617/s11527-019-1390-530.
Barbarulo
R.
, Peycelon
H.
, and Leclercq
S.
, “Chemical Equilibria between C–S–H and Ettringite, at 20 and 85°C
,” Cement and Concrete Research
37
, no. 8
(August 2007
): 1176
–1181
, https://doi.org/10.1016/J.CEMCONRES.2007.04.01331.
Chalee
W.
, Soeurt
R.
, Pachana
P.
, and Songpiriyakij
S.
, “Improvement of High-Volume Fly Ash Cementitious Material Using Single Alkali Activation
,” International Journal of Concrete Structures and Materials
15
, no. 1
(November 2021
): 44, https://doi.org/10.1186/s40069-021-00482-932.
De Belie
N.
, Scrivener
K. L.
, Lothenbach
B.
, Gruyaert
E.
, Skibsted
J.
, Snellings
R.
, Vollpracht
A.
, and Villagran
Y.
, “Determination of the Degree of Reaction of Fly Ash in Blended Cement Pastes
” (paper presentation, 14th International Congress on the Chemistry of Cement, Beijing, China, October 13–16, 2015
).33.
Suraneni
P.
, Hajibabaee
A.
, Ramanathan
S.
, Wang
Y.
, and Weiss
J.
, “New Insights from Reactivity Testing of Supplementary Cementitious Materials
,” Cement and Concrete Composites
103
(October 2019
): 331
–338
, https://doi.org/10.1016/j.cemconcomp.2019.05.01734.
Suraneni
P.
, “Recent Developments in Reactivity Testing of Supplementary Cementitious Materials
,” RILEM Technical Letters
6
(December 2021
): 131
–139
, https://doi.org/10.21809/rilemtechlett.2021.15035.
Aughenbaugh
K. L.
, Stutzman
P.
, and Juenger
M. C. G.
, “Identifying Glass Compositions in Fly Ash
,” Frontiers in Materials
3
, no. 1
(January 2016
): 1
–10
, https://doi.org/10.3389/fmats.2016.0000136.
Mirzahosseini
M.
and Riding
K. A.
, “Effect of Curing Temperature and Glass Type on the Pozzolanic Reactivity of Glass Powder
,” Cement Concrete Research
58
(April 2014
): 103
–111
, https://doi.org/10.1016/j.cemconres.2014.01.015
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