Weathering Carbonation Behavior of Concrete Subject to Early-Age Carbonation Curing
Publication: Journal of Materials in Civil Engineering
Volume 32, Issue 4
Abstract
Early-age carbonation for concrete curing has gained increasing attention due to the remarkably enhanced material performance and substantial storage capability. However, carbonation curing leads to reductions in concrete pH and may weaken concrete’s ability to resist weathering carbonation–induced corrosion during service. This study examines the atmospheric weathering carbonation behavior of portland cement–based concretes after carbonation curing. Two types of concrete mixtures representing normal and high-strength concretes were cured with carbonation at two different durations of high-pressure exposure. Compressive strength and water absorption of concrete were measured upon the completion of carbonation curing and the 28-day subsequent moisture curing. An accelerated weathering carbonation test (AWCT) was consecutively performed for 12 weeks, and concrete carbonation depth, pH distribution, and compressive strength were measured. It was found that the coefficients of diffusion due to weathering carbonation were significantly reduced in concrete subject to carbonation curing. The ultimate carbonation depth was attributed to both carbonation curing and weathering carbonation. The normal strength concrete with a higher water-to-cement (w/c) ratio showed a larger ultimate carbonation depth because of the more intensive carbonation curing but was found to substantially slow down the rate of weathering carbonation. With sufficient rebar depth, reinforced concretes made with this mix design could potentially develop a more robust resistance to weathering carbonation–induced corrosion through carbonation curing. With a lower w/c ratio, high-strength concrete cured by carbonation appeared less vulnerable to weathering carbonation due to the lower intensity of carbonation curing and hence proved to be viable for this curing approach. On exposure to 12-week AWCT, concrete made with ratio exhibited comparable carbonation depths and pH profiles regardless of curing methods. It is inferred that carbonation curing could potentially be applied to normal-strength reinforced concretes with large rebar depths or general high-strength concrete formulations without accentuating the risk of carbonation-induced corrosion.
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References
Ahmad, S. 2003. “Reinforcement corrosion in concrete structures, its monitoring and service life prediction––A review.” Cem. Concr. Compos. 25 (4–5): 459–471. https://doi.org/10.1016/S0958-9465(02)00086-0.
ASTM. 2013. Standard test method for density, absorption, and voids in hardened concrete. ASTM C642. West Conshohocken, PA: ASTM.
Berger, R., J. Young, and K. Leung. 1972. “Acceleration of hydration of calcium silicates by carbon dioxide treatment.” Nat. Phys. Sci. 240 (97): 16. https://doi.org/10.1038/physci240016a0.
Berger, R. L., and W. Klemm. 1972. “Accelerated curing of cementitious systems by carbon dioxide: Part II. Hydraulic calcium silicates and aluminates.” Cem. Concr. Res. 2 (6): 647–652. https://doi.org/10.1016/0008-8846(72)90002-6.
Chi, J. M., R. Huang, and C. Yang. 2002. “Effects of carbonation on mechanical properties and durability of concrete using accelerated testing method.” J. Mar. Sci. Technol. 10 (1): 14–20.
CSA (Canadian Standards Association). 2013. Cementitious materials used in concrete. CSA A3001. Rexdale, ON, Canada: CSA.
El-Hassan, H., and Y. Shao. 2015. “Early carbonation curing of concrete masonry units with portland limestone cement.” Cem. Concr. Compos. 62 (Sep): 168–177. https://doi.org/10.1016/j.cemconcomp.2015.07.004.
El-Hassan, H., Y. Shao, and Z. Ghouleh. 2013. “Effect of initial curing on carbonation of lightweight concrete masonry units.” ACI Mater. J. 110 (4): 441–450.
Heng, M., and K. Murata. 2004. “Aging of concrete buildings and determining the pH value on the surface of concrete by using a handy semi-conductive pH meter.” Anal. Sci. 20 (7): 1087–1090. https://doi.org/10.2116/analsci.20.1087.
Monkman, S. 2008. Maximizing carbon uptake and performance gain in slag-containing concretes through early carbonation. Montréal: McGill Univ.
Monkman, S., and Y. Shao. 2006. “Assessing the carbonation behavior of cementitious materials.” J. Mater. Civ. Eng. 18 (6): 768–776. https://doi.org/10.1061/(ASCE)0899-1561(2006)18:6(768).
Monkman, S., and Y. Shao. 2009. “Carbonation curing of slag-cement concrete for binding CO2 and improving performance.” J. Mater. Civ. Eng. 22 (4): 296–304. https://doi.org/10.1061/(ASCE)MT.1943-5533.0000018.
Papadakis, V. G., M. N. Fardis, and C. G. Vayenas. 1992. “Hydration and carbonation of pozzolanic cements.” Mater. J. 89 (2): 119–130.
Papadakis, V. G., C. G. Vayenas, and M. N. Fardis. 1991. “Fundamental modeling and experimental investigation of concrete carbonation.” Mater. J. 88 (4): 363–373.
RILEM 1988. “CPC-18 Measurement of hardened concrete carbonation depth.” Mater. Struct. 21 (6): 453–455. https://doi.org/10.1007/BF02472327.
Rostami, V., Y. Shao, and A. J. Boyd. 2011a. “Carbonation curing versus steam curing for precast concrete production.” J. Mater. Civ. Eng. 24 (9): 1221–1229. https://doi.org/10.1061/(ASCE)MT.1943-5533.0000462.
Rostami, V., Y. Shao, and A. J. Boyd. 2011b. “Durability of concrete pipes subjected to combined steam and carbonation curing.” Constr. Build. Mater. 25 (8): 3345–3355. https://doi.org/10.1016/j.conbuildmat.2011.03.025.
Rostami, V., Y. Shao, A. J. Boyd, and Z. He. 2012. “Microstructure of cement paste subject to early carbonation curing.” Cem. Concr. Res. 42 (1): 186–193. https://doi.org/10.1016/j.cemconres.2011.09.010.
Roy, S., K. Poh, and D. Northwood. 1999. “Durability of concrete—Accelerated carbonation and weathering studies.” Build. Environ. 34 (5): 597–606. https://doi.org/10.1016/S0360-1323(98)00042-0.
Scrivener, K., R. Snellings, and B. Lothenbach. 2016. A practical guide to microstructural analysis of cementitious materials. Boca Raton, FL: CRC Press.
Shao, Y., A. Zhou, and M. Mahoutian. 2015. “Pseudo-dynamic carbonation for concrete curing and carbon storage.” Int. J. Mater. Struct. Integrity 9 (1–3): 21–38. https://doi.org/10.1504/IJMSI.2015.071108.
Taylor, H. F. 1997. Cement chemistry. London: Thomas Telford.
Wu, H.-L., D. Zhang, B. R. Ellis, and V. C. Li. 2018. “Development of reactive MgO-based engineered cementitious composite (ECC) through accelerated carbonation curing.” Constr. Build. Mater. 191 (Dec): 23–31. https://doi.org/10.1016/j.conbuildmat.2018.09.196.
Yang, H., and Y. Shao. 2015. “Early carbonation behavior of high-volume dolomite powder-cement based materials.” J. Wuhan Univ. Technol.-Mater. Sci. Ed. 30 (3): 541–549. https://doi.org/10.1007/s11595-015-1186-6.
Zhang, D., X. Cai, and Y. Shao. 2016. “Carbonation curing of precast fly ash concrete.” J. Mater. Civ. Eng. 28 (11): 04016127. https://doi.org/10.1061/(ASCE)MT.1943-5533.0001649.
Zhang, D., Z. Ghouleh, and Y. Shao. 2017. “Review on carbonation curing of cement-based materials.” J. Util. 21 (Oct): 119–131. https://doi.org/10.1016/j.jcou.2017.07.003.
Zhang, D., V. C. Li, and B. R. Ellis. 2018. “Optimal pre-hydration age for CO2 sequestration through portland cement carbonation.” ACS Sustainable Chem. Eng. 6 (12): 15976–15981. https://doi.org/10.1021/acssuschemeng.8b03699.
Zhang, D., and Y. Shao. 2016a. “Early age carbonation curing for precast reinforced concretes.” Constr. Build. Mater. 113 (Jun): 134–143. https://doi.org/10.1016/j.conbuildmat.2016.03.048.
Zhang, D., and Y. Shao. 2016b. “Effect of early carbonation curing on chloride penetration and weathering carbonation in concrete.” Constr. Build. Mater. 123 (Oct): 516–526. https://doi.org/10.1016/j.conbuildmat.2016.07.041.
Zhang, D., and Y. Shao. 2018. “Surface scaling of CO2-cured concrete exposed to freeze-thaw cycles.” J. CO2 Util. 27 (Oct): 137–144. https://doi.org/10.1016/j.jcou.2018.07.012.
Zhang, D., and Y. Shao. 2019. “Enhancing chloride corrosion resistance of precast reinforced concrete by carbonation curing.” ACI Mater. J. 116 (3): 3–12.
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©2020 American Society of Civil Engineers.
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Received: Feb 26, 2019
Accepted: Aug 26, 2019
Published online: Jan 24, 2020
Published in print: Apr 1, 2020
Discussion open until: Jun 24, 2020
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