Influence of Surface Sealers on the Properties of Internally Cured Cement Mortars Containing Saturated Fine Lightweight Aggregate
Publication: Journal of Materials in Civil Engineering
Volume 27, Issue 12
Abstract
To date, internal curing (IC) has been widely accepted as a promising way to mitigate the autogenous shrinkage of high-performance concretes (HPCs). While extensive studies have confirmed the benefits of internal curing to HPCs cured under sufficient moisture, the durability implications of early-age drying remain unclear for internally cured cement-based materials. As such, this work investigates the influence of early-age drying on the properties of internally cured cement mortars containing saturated fine lightweight aggregate (LWA). The tests conducted on cement mortars with or without internal curing include: drying shrinkage, moisture loss, compressive strength, splitting tensile strength, water absorption, and gas permeability. Additionally, two surface sealers were individually applied to mortars and evaluated for their effectiveness in reducing the risk of early-age drying. The results reveal that early-age drying significantly offsets the advantages of internal curing of LWA with respect to shrinkage reduction and microstructure densification. In this case, the presence of surface treatments can preserve and enhance the benefits of internal curing of cement mortar. Observations made using a scanning electron microscope suggest that coverage and integrity of the sealer film define its effectiveness in retaining moisture. Further studies on concrete specimens with larger cross sections and with various curing conditions are recommended in order to practically evaluate the effect of early-age drying on internally cured concrete.
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Acknowledgments
This work was financially supported by the China National Science Foundation (51302191), National Basic Research Program of China (2011CB013805), National Key Project of Scientific and Technical Supporting Programs of China (2014BAL03B02). The authors also gratefully acknowledge the support received from Corrosion & Sustainable Infrastructure Laboratory (CSIL) of Western Transportation Institute (WTI), Montana State University, as well as the materials supplied by Utelite Corporation, Transpo Industries, Inc., and Kwik Bond Polymers.
References
Alshamsi, A. M., and Imran, H. D. (2002). “Development of a permeability apparatus for concrete and mortar.” Cem. Concr. Res., 32(6), 923–929.
Assmann, A., and Reinhardt, H. (2014). “Tensile creep and shrinkage of SAP modified concrete.” Cem. Concr. Res., 58, 179–185.
ASTM. (2011). “Standard test method for splitting tensile strength of cylindrical concrete specimens.”, West Conshohocken, PA.
ASTM. (2012). “Standard specification for portland cement.”, West Conshohocken, PA.
ASTM. (2013a). “Standard specification for lightweight aggregate for internal curing of concrete.”, West Conshohocken, PA.
ASTM. (2013b). “Standard test method for flow of hydraulic cement mortar.”, West Conshohocken, PA.
ASTM. (2013c). “Standard test method for measurement of rate of absorption of water by hydraulic-cement concretes.”, West Conshohocken, PA.
ASTM. (2014a). “Standard test method for compressive strength of cylindrical concrete specimens.”, West Conshohocken, PA.
ASTM. (2014b). “Standard test method for length change of hardened hydraulic-cement mortar and concrete.”, West Conshohocken, PA.
Baroghel-Bouny, V. (2000). “Experimental study on drying shrinkage of ordinary and high-performance cementitious materials.” Int. RILEM Workshop on Shrinkage of Concrete, V. Baroghel-Bouny and P. C. Aïtcin, eds., RILEM Publications S.A.R.L., Evanston, IL, 215–232.
Bentz, D., and Snyder, K. (1999). “Protected paste volume in concrete: Extension to internal curing using saturated lightweight fine aggregate.” Cem. Concr. Res., 29(11), 1863–1867.
Bentz, D. P. (2009). “Influence of internal curing using lightweight aggregates on interfacial transition zone percolation and chloride ingress in mortars.” Cem. Concr. Compos., 31(5), 285–289.
Bentz, D. P., Lura, P., and Roberts, J. W. (2005). “Mixture proportioning for internal curing.” Concr. Int., 27(2), 35–40.
Bentz, D. P., and Stutzman, P. E. (2008). “Internal curing and microstructure of high-performance mortars.” ACI Special Publication, 256, 81–90.
Byard, B. E., Schindler, A. K., and Barnes, R. W. (2011). “Early-age cracking tendency and ultimate degree of hydration of internally cured concrete.” J. Mater. Civ. Eng., 1025–1033.
Castro, J., Keiser, L., Golias, M., and Weiss, J. (2011) “Absorption and desorption properties of fine lightweight aggregate for application to internally cured concrete mixtures.” Cem. Concr. Compos., 33(10), 1001–1008.
Castro, J. I., De la Varga, I., Golias, M., and Weiss, J. (2010). “Extending internal curing concepts to mixtures containing high volumes of fly ash.” Proc., 2010 Concrete Bridge Conf.: Achieving Safe, Smart and Sustainable Bridges, Portland Cement Association, Phoenix, AZ.
Cusson, D., Lounis, Z., and Daigle, L. (2010). “Benefits of internal curing on service life and life-cycle cost of high-performance concrete bridge decks—A case study.” Cem. Concr. Compos., 32(5), 339–350.
Dang, Y., Xie, N., Kessel, A., McVey, E., Pace, A., and Shi, X. (2014). “Accelerated laboratory evaluation of surface treatments for protecting concrete bridge decks from salt scaling.” Constr. Build. Mater., 55, 128–135.
Delatte, N., Crowl, D., Mack, E., and Cleary, J. (2008). “Internal curing of high performance concrete: Lab and field experiences.” Evaluating high absorptive materials to improve the internal curing of concrete, B. J. Mohr and D. P. Bentz, eds., American Concrete Institute, Farmington Hill, MI, 91–104.
Dyer, T. (2014). Concrete durability, CRC Press, Boca Raton, FL.
Friggle, T., and Reeves, D. (2008). “Internal curing of high performance concrete: Lab and field experiences.” Internal curing of concrete paving: laboratory and field experience, B. J. Mohr and D. P. Bentz, eds., American Concrete Institute, Farmington Hill, MI, 71–80.
Golias, M. (2010). “The use of soy methyl ester-polystyrene sealants and internal curing to enhance concrete durability.” M.S. thesis, Purdue Univ., Purdue, IN.
Golias, M., Castro, J., and Weiss, J. (2012). “The influence of the initial moisture content of lightweight aggregate on internal curing.” Constr. Build. Mater., 35, 52–62.
Hamami, A., Turcry, P., and Aït-Mokhtar, A. (2012). “Influence of mix proportions on microstructure and gas permeability of cement pastes and mortars.” Cem. Concr. Res., 42(2), 490–498.
Han, B., Yang, Z., Shi, X., and Yu, X. (2013). “Transport properties of carbon-nanotube/cement composites.” J. Mater. Eng. Perform., 22(1), 184–189.
Henkensiefken, R. (2008). “Internal curing in cementitious systems made using saturated lightweight aggregate.” Ph.D. dissertation, Purdue Univ., West Lafayette, IN.
Henkensiefken, R., Bentz, D., Nantung, T., and Weiss, J. (2009a). “Volume change and cracking in internally cured mixtures made with saturated lightweight aggregate under sealed and unsealed conditions.” Cem. Concr. Compos., 31(7), 427–437.
Henkensiefken, R., Briatka, P., Bentz, D., Nantung, T., and Weiss, J. (2010). “Plastic shrinkage cracking in internally cured mixtures made with pre-wetted lightweight aggregate.” Concr. Int., 32(2), 49–54.
Henkensiefken, R., Castro, J., Bentz, D., Nantung, T., and Weiss, J. (2009b). “Water absorption in internally cured mortar made with water-filled lightweight aggregate.” Cem. Concr. Res., 39(10), 883–892.
Ideker, J. H., Deboodt, T., and Fu, T. (2013). “Internal curing of high-performance concrete for bridge decks.”, Oregon Dept. of Transportation, Salem, OR.
Jensen, O. M., and Hansen, P. F. (2001). “Water-entrained cement-based materials: I. Principles and theoretical background.” Cem. Concr. Res., 31(4), 647–654.
Jensen, O. M., and Hansen, P. F. (2002). “Water-entrained cement-based materials: II. Experimental observations.” Cem. Concr. Res., 32(6), 973–978.
Kevern, J. T., and Farney, C. (2012). “Reducing curing requirements for pervious concrete with a superabsorbent polymer for internal curing.”, Transportation Research Board, Washington, DC, 115–121.
Kong, X.-L., Zhang, Z.-L., and Lu, Z.-C. (2014). “Effect of pre-soaked superabsorbent polymer on shrinkage of high-strength concrete.” Mater. Struct., 47(6), 1–18.
Kovler, K., and Bentur, A. (2009). “Cracking sensitivity of normal-and high-strength concretes.” ACI Mater. J., 106(6), 537–542.
Kovler, K., and Zhutovsky, S. (2006). “Overview and future trends of shrinkage research.” Mater. Struct., 39(9), 827–847.
Lam, H. (2005). “Effects of internal curing methods on restrained shrinkage and permeability [microform].” M.A.Sc. thesis, Univ. of Toronto, Toronto.
Liu, X., Chia, K. S., and Zhang, M.-H. (2010). “Development of lightweight concrete with high resistance to water and chloride-ion penetration.” Cem. Concr. Compos., 32(10), 757–766.
Liu, Y., and Shi, X. (2012). “Ionic transport in cementitious materials under an externally applied electric field: Finite element modeling.” Constr. Build. Mater., 27(1), 450–460.
Lura, P., Bentz, D. P., Lange, D. A., Kovler, K., and Bentur, A. (2004). “Pumice aggregates for internal water curing.” PRO 36: Proc., Int. RILEM Symp. on Concrete Science and Engineering—A tribute to ArnonBentur, K. Kovler, J. Marchand, S. Mindess, and J. Weiss, eds., Northwestern Univ., Evanston, IL, 137–151.
Ma, B.-G., Wen, X.-D., Wang, M.-Y., Yan, J.-J., and Xiao-jian, G. (2007). “Drying shrinkage of cement-based materials under conditions of constant temperature and varying humidity.” J. China Univ. Min. Technol., 17(3), 428–431.
Maruyama, I., and Sato, R. (2005). “A trial of reducing autogenous shrinkage by recycled aggregate.” Proc., Self-Desiccation and Its Importance in Concrete Technology, B. Persson, D. Bentz, and L. O. Nilsson, eds., Lund Institute of Technology, Lund Univ., Lund, Sweden, 264–270.
Mechtcherine, V., Dudziak, L., Schulze, J., and Staehr, H. (2006). “Internal curing by super absorbent polymers (SAP)—Effects on material properties of self-compacting fibre-reinforced high performance concrete.” Proc., Int. RILEM Conf. on Volume Changes of Hardening Concrete: Testing and Mitigation, RILEM Publications S.A.R.L., Evanston, IL, 87–96.
Mönnig, S., Reinhardt, H.-W., Jensen, O., Lura, P., and Kovler, K. (2006). “Results of a comparative study of the shrinkage behaviour of concrete and mortar mixtures with different internal water sources.” Proc., Int. RILEM Conf. on Volume Changes of Hardening Concrete: Testing and Mitigation, RILEM Publications S.A.R.L., Evanston, IL, 67–75.
Philleo, R. (1991). “Materials science of concrete II.” Concrete science and reality, J. P. Skalny and S. Mindess, eds., American Ceramic Society, Westerville, OH.
Radlinska, A., Rajabipour, F., Bucher, B., Henkensiefken, R., Sant, G., and Weiss, J. (2008). “Shrinkage mitigation strategies in cementitious systems: A closer look at differences in sealed and unsealed behavior.”, Transportation Research Board, Washington, DC, 59–67.
Teo, D., Mannan, M., and Kurian, V. (2010). “Durability of lightweight OPS concrete under different curing conditions.” Mater. Struct., 43(1–2), 1–13.
Wang, K., Jansen, D. C., Shah, S. P., and Karr, A. F. (1997). “Permeability study of cracked concrete.” Cem. Concr. Res., 27(3), 381–393.
Wu, S., Chen, X., and Zhou, J. (2012). “Influence of strain rate and water content on mechanical behavior of dam concrete.” Constr. Build. Mater., 36, 448–457.
Yang, Z., Hollar, J., He, X., and Shi, X. (2011). “A self-healing cementitious composite using oil core/silica gel shell microcapsules.” Cem. Concr. Compos., 33(4), 506–512.
Zhutovsky, S., and Kovler, K. (2012). “Effect of internal curing on durability-related properties of high performance concrete.” Cem. Concr. Res., 42(1), 20–26.
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Published In
Journal of Materials in Civil Engineering
Volume 27 • Issue 12 • December 2015
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Sep 8, 2014
Accepted: Feb 6, 2015
Published online: Apr 3, 2015
Discussion open until: Sep 3, 2015
Published in print: Dec 1, 2015
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