Effects of Air-Cooled Blast Furnace Slag Aggregate on Pore Solution Chemistry of Cementitious Systems
Publication: Journal of Materials in Civil Engineering
Volume 32, Issue 1
Abstract
Air-cooled blast furnace slag (ACBFS) can be used to replace naturally mined aggregates to minimize the environmental and economic costs associated with construction. This paper compares pore solution chemistry of mortars prepared using ACBFS aggregate with pore solution chemistry of control mortars (i.e., mortars containing siliceous sand). The objective of the study was to evaluate the effects of the chemistry of ACBFS particles on the composition of the pore solution and how this chemistry may influence the process of hydration in cementitious systems incorporating ACBFS aggregate. The chemical composition of pore solutions was determined using the inductively coupled plasma optical emission spectroscopy (ICP-OES) technique. During the initial hydration period (), the concentration of sulfur in the pore solution of mortars was not affected by the presence of ACBFS aggregate. However, after 7 days of hydration, the concentration of sulfur in mortars containing ACBFS aggregate was 3.4–5.6 times higher than that observed in corresponding control mortars. Thermogravimetric analysis of mortars revealed that those containing the ACBFS aggregate underwent a lower degree of hydration compared to control mortars. For mortars with and without ACBFS aggregate, partial replacement of Type I ordinary portland cement (OPC) with fly ash reduced the concentration of sulfur in pore solutions after 7 days of hydration when compared with corresponding mortars prepared using only Type I OPC or a blend of Type I OPC and slag cement.
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References
ASTM. 2014. Standard practice for mechanical mixing of hydraulic cement pastes and mortars of plastic consistency. ASTM C305. West Conshohocken, PA: ASTM.
ASTM. 2017a. Standard specification for portland cement. ASTM C150. West Conshohocken, PA: ASTM.
ASTM. 2017b. Standard specification for standard sand. ASTM C778. West Conshohocken, PA: ASTM.
Barneyback, R. S., and S. Diamond. 1981. “Expression and analysis of pore fluids from hardened cement pastes and mortars.” Cem. Concr. Res. 11 (2): 279–285. https://doi.org/10.1016/0008-8846(81)90069-7.
Bennett, D. G., D. Read, M. Atkins, and F. P. Glasser. 1992. “A thermodynamic model for blended cements. II: Cement hydrate phases; thermodynamic values and modelling studies.” J. Nucl. Mater. 190 (Aug): 315–325. https://doi.org/10.1016/0022-3115(92)90096-4.
Buch, N., and S. Jahangirnejad. 2008. “Quantifying coefficient of thermal expansion values of typical hydraulic cement concrete paving mixtures.” Rep. No. RC-1503. Accessed April 3, 2017. https://www.michigan.gov/documents/mdot/MDOT_Research_Report_RC1503_228603_7.pdf.
Bullard, J. W., G. W. Scherer, and J. J. Thomas. 2015. “Time dependent driving forces and the kinetics of tricalcium silicate hydration.” Cem. Concr. Res. 74 (Aug): 26–34. https://doi.org/10.1016/j.cemconres.2015.03.016.
Grove, J., F. Bektas, and H. Gieselman. 2006. “Southeast Michigan local road concrete pavement durability study, final report.”. Accessed April 3, 2017. http://lib.dr.iastate.edu/intrans_reports/152/.
Hammerling, D. M. 1999. “Calcium sulfide in blastfurnace slag used as concrete aggregate.” M.S. thesis, Michigan Technological Univ.
INDOT (Indiana Department of Transportation). 2010. “Standard specifications.”. Accessed April 3, 2017. http://www.in.gov/dot/div/contracts/standards/book/sep09/5-2010.pdf.
Jawed, I., and J. Skalny. 1978. “Alkalies in cement: A review.” Cem. Concr. Res. 8 (1): 37–51. https://doi.org/10.1016/0008-8846(78)90056-X.
Lankard, D. 2010. “Forensic investigation of AC and PCC pavements with extended service life, Volume 3: Petrographic examination of blast furnace slag aggregate concrete cores taken from PCC pavements in Cuyahoga County, Ohio.”. Accessed April 3, 2017. http://www.dot.state.oh.us/Divisions/Planning/SPR/Research/Pages/default.aspx.
Lothenbach, B., and F. Winnefeld. 2006. “Thermodynamic modelling of the hydration of portland cement.” Cem. Concr. Res. 36 (2): 209–226. https://doi.org/10.1016/j.cemconres.2005.03.001.
Nicoleau, L., E. Schreiner, and A. Nonat. 2014. “Ion-specific effects influencing the dissolution of tricalcium silicate.” Cem. Concr. Res. 59 (May): 118–138. https://doi.org/10.1016/j.cemconres.2014.02.006.
Panchmatia, P., J. Olek, and T. Kim. 2018. “The influence of air cooled blast furnace slag (ACBFS) aggregate on the concentration of sulfates in concrete’s pore solution.” Constr. Build. Mater. 168 (Apr): 394–403. https://doi.org/10.1016/j.conbuildmat.2018.02.133.
Rothstein, D., J. J. Thomas, B. J. Christensen, and H. M. Jennings. 2002. “Solubility behavior of Ca-, S-, Al-, and Si-bearing solid phases in portland cement pore solutions as a function of hydration time.” Cem. Concr. Res. 32 (10): 1663–1671. https://doi.org/10.1016/S0008-8846(02)00855-4.
Scholer, A., B. Lothenbach, F. Winnefeld, M. Ben Haha, M. Zajac, and H. M. Ludwig. 2017. “Early hydration of SCM-blended portland cements: A pore solution and isothermal calorimetry study.” Cem. Concr. Res. 93 (Mar): 71–82. https://doi.org/10.1016/j.cemconres.2016.11.013.
Smith, K., D. Morian, and T. Van Dam. 2012. Use of air-cooled blast furnace slag as coarse aggregate in concrete pavements—A guide to best practice.. Washington, DC: Federal Highway Administration.
Verian, K. P. 2015. “Influence of air-cooled blast furnace slag (ACBFS) coarse aggregate on properties of pavement concrete exposed to freezing-thawing and wetting-drying conditions.” Ph.D. thesis, Lyles School of Civil Engineering, Purdue Univ.
Verian, K. P., P. Panchmatia, J. Olek, and T. Nantung. 2015. “Pavement concrete with air-cooled blast furnace slag and dolomite as coarse aggregates—Effects of deicers and freeze-thaw cycles.” Transp. Res. Rec. 2508 (1): 55–64. https://doi.org/10.3141/2508-07.
Vollpracht, A., B. Lothenbach, R. Snellings, and J. Haufe. 2016. “The pore solution of blended cements: A review.” Mater. Struct. 49 (8): 3341–3367. https://doi.org/10.1617/s11527-015-0724-1.
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Published In
Journal of Materials in Civil Engineering
Volume 32 • Issue 1 • January 2020
Copyright
©2019 American Society of Civil Engineers.
History
Received: Dec 11, 2018
Accepted: Jun 14, 2019
Published online: Oct 22, 2019
Published in print: Jan 1, 2020
Discussion open until: Mar 22, 2020
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