Concrete Containing Natural Pozzolans: New Challenges for Internal Curing
Publication: Journal of Materials in Civil Engineering
Volume 24, Issue 8
Abstract
Natural pozzolans (NP) have proven to be an effective supplementary cementitious material; however, the replacement of ordinary portland cement (OPC) with NP might increase the autogenous and drying shrinkage of concrete. Internal curing (IC) might be of great help when using NP because it can promote the pozzolanic reactions and reduce shrinkage. The aim of this research is to assess the effect of IC in concrete containing NP. Results indicate that a 39% replacement of OPC with NP decreased compressive strength by 15%, decreased chloride ion permeability by 66%, and increased autogenous shrinkage by 40%. IC with prewetted lightweight aggregate showed no significant effect in compressive strength or permeability, but it decreased autogenous shrinkage by up to 58%. NP used in this investigation presented higher chemical shrinkage than OPC, making IC less effective as levels of NP increased. The important decrease in permeability attained through the use of NP and the higher chemical shrinkage of NP makes IC a critical technology to consider in concrete mixtures with NP.
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Acknowledgments
The authors greatly acknowledge the support given by the Chilean Council for Science and Technology Research (Conicyt) through Fondecyt Project #11060341 and the support of Rafael Cepeda, from Cementos Polpaico, for the important information provided. Additionally, the authors want to thank Mauricio Guerra, Patricio Garcia, and several students for their assistance during the research.
References
American Concrete Institute (ACI). (2000). “Cement and concrete terminology.” ACI manual of concrete practice, ACI Committee 116, American Concrete Institute, Farmington Hills, MI.
American Concrete Institute (ACI). (2001). “Guide to curing concrete.” ACI manual of concrete practice, ACI Committee 308, American Concrete Institute, Farmington Hills, MI.
American Concrete Institute (ACI). (2002). “Use of raw or processed natural pozzolans in concrete.” ACI manual of concrete practice, ACI Committee 232, American Concrete Institute, Farmington Hills, MI.
Andriolo, F. R. (1975). A utilizacado da pozzolana na construcado do conjunto hidroelectrico de urubupunga, CESP Publication, Companhia Energetica de Sao Paolo, Brazil (in Portuguese).
ASTM. (2001). “Standard test method for compressive strength of cylindrical concrete specimens.” C39/C39M, West Conshohocken, PA.
ASTM. (2004). “Standard test method for time of setting of hydraulic cement by Vicat needle.” C191, West Conshohocken, PA.
ASTM. (2005). “Standard test method for electrical indication of concrete’s ability to resist chloride ion penetration.” C1202, West Conshohocken, PA.
ASTM. (2008). “Standard specification for coal fly ash and raw or calcined natural pozzolan for use in concrete.” C618, West Conshohocken, PA.
ASTM. (2009). “Standard test method for autogenous strain of cement paste and mortar.” C1698, West Conshohocken, PA.
Ayers, M. E., and Khan, M. S. (1993). “Overview of fly ash and silica fume concretes: The need for rational curing standards.” Proc., V. Mohan Malhotra Symp., American Concrete Institute, Farmington Hills, MI, 605–617.
Baroghel-Bouny, V. (1996). “Texture and moisture properties of ordinary and high-performance cementitious materials.” Proc., Int. RILEM Conf. “Concrete: From Material to Structure”, RILEM Publications, Bagneux, France, 144–165.
Bentur, A., Igarashi, S. I., and Kovler, K. (2001). “Prevention of autogenous shrinkage in high-strength concrete by internal curing using wet lightweight aggregates.” Cem. Concr. Res.CCNRAI, 31(11), 1587–1591.
Bentz, D. P. (2007). “Internal curing of high-performance blended cement mortars.” ACI Mater. J.AMAJEF, 104(4), 408–414.
Bentz, D. P., Jensen, O. M., Coats, A. M., and Glasser, F. P. (2000). “Influence of silica fume on diffusivity in cement-based materials: I. Experimental and computer modeling studies on cement pastes.” Cem. Concr. Res.CCNRAI, 30(6), 953–962.
Bentz, D. P., Lura, P., and Roberts, J. (2005). “Mixture proportioning for internal curing.” Concr. Int.CNCIEH, 27(2), 35–40.
Bentz, D. P., and Snyder, K. A. (1999). “Protected paste volume in concrete: Extension to internal curing using saturated lightweight fine aggregate.” Cem. Concr. Res.CCNRAI, 29(11), 1863–1867.
Cusson, D., and Hoogeveen, T. (2008). “Internal curing of high-performance concrete with pre-soaked fine lightweight aggregate for prevention of autogenous shrinkage cracking.” Cem. Concr. Res.CCNRAI, 38(6), 757–765.
Espinoza-Hijazim, G., and Lopez, M. (2011). “Extending internal curing to concrete mixtures with higher than 0.42.” Constr. Build. Mater., 25(3), 1236–1242.
Jensen, O. M., and Hansen, P. F. (1995). “A dilatometer for measuring autogenous deformation in hardening cement paste.” Mater. Struct.MASTED, 28(7), 406–409.
Jensen, O. M., and Hansen, P. F. (2001). “Autogenous deformation and RH-change in perspective.” Cem. Concr. Res.CCNRAI, 31(12), 1859–1865.
Jensen, O. M., and Hansen, P. F. (2002). “Water-entrained cement-based materials: II. Experimental observations.” Cem. Concr. Res.CCNRAI, 32(6), 973–978.
Jensen, O. M., and Lura, P. (2006). “Techniques and materials for internal water curing of concrete.” Mater. Struct.MASTED, 39(9), 817–825.
Kovler, K. (2007). “Effect of internal curing on autogenous deformation.” Chapter 7, Internal curing of concrete, RILEM TC 196-ICC: State of the art report, Kovler, K. and Jensen, O. M., eds., RILEM Publications, Bagneux, France.
Kovler, K., and Jensen, O. M. (2005). “Novel techniques for concrete curing.” Concr. Int.CNCIEH, 27(9), 39–42.
Lea, F. M. (1971). The chemistry of cement and concrete, Chemical Publishing, Burlington, MA, 414–453.
Lopez, M., Castro, J. T. (2010). “Effect of natural pozzolans on porosity and pore connectivity of concrete with time.” Revista Ingeniería de ConstrucciónJCEMD4, 25(3), 419–431.
Lopez, M., Kahn, L. F., and Kurtis, K. E. (2005). “Internal curing in high performance concretes—A new paradigm.” Revista Ingeniería de ConstrucciónJCEMD4, 20(2), 117–126 (in Spanish).
Malhotra, V. M., and Mehta, P. K. (2009). High-performance, high-volume fly ash concrete: Materials, mixture proportions, properties, construction practice, and case histories, Supplementary Cementing Materials for Sustainable Development Inc., Ottawa, ON.
Mather, B. (1958). “The partial replacement of portland cement in concrete.” Cement and Concrete (STP-205), ASTM, West Conshohocken, PA, 37–73.
Mehta, P. K. (1981). “Studies on blended portland cements containing santorin-earth.” Cem. Concr. Res.CCNRAI, 11(4), 507–518.
Mehta, P. K. (1987). “Natural pozzolans: Supplementary cementing materials.” Proc., Int. Symp. on Advances in Concrete Technology, Malhotra, V. M., ed., CANMET, Athens, Greece, 407–430.
Mehta, P. K., and Monteiro, P. J. M. (2006). Concrete: Microstructure, properties and materials, McGraw-Hill, New York.
Mielenz, R. C., Witte, L., and Glantz, O. (1950). Effect of calcination on natural pozzolans (STP-99), ASTM, West Conshohocken, PACI Committee 213.A, 43–92.
Mindess, S., Young, J. F., and Darwing, D. (2003). Concrete, Prentice Hall, Upper Saddle River, NJ.
Mouli, M., and Khelafi, H. (2008). “Performance characteristics of lightweight aggregate concrete containing natural pozzolan.” Build. Environ.BUSCBC, 43(1), 31–36.
Papadakis, V. G., and Tsimas, S. (2002). “Supplementary cementing materials in concrete, Part I: Efficiency and design.” Cem. Concr. Res.CCNRAI, 32(10), 1525–1532.
Paul, A., and Lopez, M. (2011). “Assessing lightweight aggregate efficiency for maximizing internal curing performance.” ACI Mater. J.AMAJEF, 108(4), 385–393.
Pekmezci, B. Y., and Akyüz, S. (2004). “Optimum usage of a natural pozzolan for the maximum compressive strength of concrete.” Cem. Concr. Res.CCNRAI, 34(12), 2175–2179.
Philleo, R. E. (Mindess, S.1991). “Concrete science and reality.” Materials science of concrete II, Skalny, J. and, eds., American Ceramic Society, Westerville, OH, 1–8.
Powers, T. C. (1960). “Physical properties of cement paste.” Proc., Fourth Int. Symp. on the Chemistry of Cement, Portland Cement Association, Skokie, IL, 577–609.
RILEM TC 199-ICC. (2007). State of the art report, Kovler, K. and Jensen, O. M., eds., RILEM Publications, Bagneux, France.
Saad, M., de Andrade, W. P., and Paulon, V. A. (1982). “Properties of mass concrete containing an active pozzolan made from clay.” Concr. Int.CNCIEH, 4(7), 59–65.
Turanli, L., Uzal, B., and Bektas, F. (2004). “Effect of material characteristics on the properties of blended cements containing high volumes of natural pozzolans.” Cem. Concr. Res.CCNRAI, 34(12), 2277–2282.
Uzal, B., and Turanli, L. (2003). “Studies on blended cements containing a high volume of natural pozzolans.” Cem. Concr. Res.CCNRAI, 33(11), 1777–1781.
Videla, C., Covarrubias, J. P., and Masana, C. (2004). “Updating concrete drying-shrinkage prediction models for local materials.” ACI Mater. J.AMAJEF, 101(3), 187–198.
Videla, C., and Lopez, M. (2002). “Effect of lightweight aggregate intrinsic strength on lightweight concrete compressive strength and modulus of elasticity.” Mater. Constr.MCUAAA, 52(265), 23–37.
Zhang, M. H., and Malhotra, V. M. (1995). “Characteristics of a thermally activated alumino-silicate pozzolanic material and its use in concrete.” Cem. Concr. Res.CCNRAI, 25(8), 1713–1725.
Zhang, M. H., and Malhotra, V. M. (1996). “High-performance concrete incorporating rice husk ash as a supplementary cementing material.” ACI Mater. J.AMAJEF, 93(6), 629–636.
Zhutovsky, S., Kovler, K., and Bentur, A. (2002). “Efficiency of lightweight aggregate for internal curing of high strength concrete to eliminate autogenous shrinkage.” Mater. Struct.MASTED, 35(2), 97–101.
Information & Authors
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Published In
Journal of Materials in Civil Engineering
Volume 24 • Issue 8 • August 2012
Pages: 981 - 988
Copyright
© 2012. American Society of Civil Engineers.
History
Received: Jun 6, 2011
Accepted: Nov 7, 2011
Published online: Nov 10, 2011
Published in print: Aug 1, 2012
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