Effect of Different Moisture States of Surface-Treated Recycled Concrete Aggregate on Properties of Fresh and Hardened Concrete
This study examined the properties of fresh and hardened concretes as influenced by the moisture state of the coarse recycled concrete aggregates (RCA) after surface treatment. Surface treatment was performed by immersing the coarse RCA in a calcium metasilicate (CM) solution. The treated coarse RCA was maintained in three controlled moisture states, namely, air-dried, oven-dried, and saturated surface-dried (SSD), prior to its use in a concrete mix. The physical properties of coarse RCA were evaluated after surface treatment during the first phase of the experiment to determine the density and the water absorption characteristics of the RCA. The second phase involved the evaluation of the slump, slump loss, density, and compressive strength of the concretes that were prepared with different proportions of natural and treated coarse RCA. Controlling the moisture state of the coarse RCA after surface treatment was found to significantly influence the properties of the fresh and hardened concretes.
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 A. K. Padmini, K. Ramamurthy, and M. S. Mathews, "Influence of parent concrete on the properties of recycled aggregate concrete," Construction and Building Materials, vol. 23, pp. 829-836, 2009.
 S. C. Kou and C. S. Poon, "Properties of concrete prepared with PVA-impregnated recycled concrete aggregates," Cement and Concrete Composites, vol. 32, pp. 649-654, 2010.
 C. S. Poon, Z. H. Shui, L. Lam, H. Fok, and S. C. Kou, "Influence of moisture states of natural and recycled aggregates on the slump and compressive strength of concrete," Cement and Concrete Research, vol. 34, pp. 31-36, 2004.
 K. Rahal, "Mechanical properties of concrete with recycled coarse aggregate," Building and Environment, vol. 42, pp. 407-415, 2007.
 J. M. V. Gómez-Soberón, "Porosity of recycled concrete with substitution of recycled concrete aggregate: An experimental study," Cement and Concrete Research, vol. 32, pp. 1301-1311, 2002.
 K. Y. Ann, H. Y. Moon, Y. B. Kim, and J. Ryou, "Durability of recycled aggregate concrete using pozzolanic materials," Waste Management, vol. 28, pp. 993-999, 2008.
 R. Zaharieva, F. Buyle-Bodin, F. Skoczylas, and E. Wirquin, "Assessment of the surface permeation properties of recycled aggregate concrete," Cement and Concrete Composites, vol. 25, pp. 223-232, 2003.
 A. Katz, "Treatments for the Improvement of Recycled Aggregate," Journal of Materials in Civil Engineering, vol. 16, pp. 597-603, 2004.
 J. J. Kim, S. H. Youn, M. J. Cho, H. T. Shin, J. B. Yoon, K. H. Hwang, and D. S. Lee, "The effect of pozzolanics on the recycled aggregates by surface treatment " Materials Science Forum vol. 486 - 487, pp. 305-308, 2005.
 S. Kutcharlapati, A. K. Sarkar, and N. P. Rajamane. Nanosilica Improves Recycled Concrete Aggregates (Online). Available: http://www.nbmcw.com/articles/concrete/admixtures-additives/20929-nanosilica-improves-recycled-concrete-aggregates.html
 M. Tsujino, T. Noguchi, M. Tamura, M. Kanematsu, and I. Maruyama, "Application of conventionally recycled coarse aggregate to concrete structure by surface modification treatment," Journal of Advanced Concrete Technology, vol. 5, pp. 13-25, 2007.
 M. J. Pelufo Carbonell, A. Domingo Cabo, V. A. Ulloa Mayorga, and N. N. Vergara AcuÑA, "Analysis of moisture state of recycled coarse aggregate and its influence on compression strength of the concrete," ed: Editorial de la Universitat Politécnica de Valencia., 2009.
 M. B. de Oliveira and E. Vazquez, "The influence of retained moisture in aggregates from recycling on the properties of new hardened concrete," Waste Management, vol. 16, pp. 113-117, 1996.
 BS 812-103.1, "Testing aggregates," in Methods for determination of particle size distribution, ed. London: British Standard Institution, 1985.
 D. C. Teychenné, R. E. Franklin, H. C. Erntroy, D. W. Hobbs, and B. K. Marsh, "Design of normal concrete mixes," Building Research Establishment, Watford, UK1997.
 BS 812 : Part 2, "Testing aggregates," in Methods of determination of density., ed. London: British Standards Institution, 1995.
 BS 812-109, "Testing aggregates.," in Methods for determination of moisture content., ed. London: British Standards Institution, 1990.
 BS EN 12350-2, "Testing fresh concrete. ," in Slump-test., ed. London: British Standards Institution, 2009.
 BS EN 12390-3, "Testing hardened concrete.," in Compressive strength of test specimens. , ed. London: British Standards Institution, 2009.
 BS EN 12390-7, "Testing hardened concrete. ," in Density of hardened concrete., ed. London: British Standards Institution 2009.
 C. S. Poon, Z. H. Shui, and L. Lam, "Effect of microstructure of ITZ on compressive strength of concrete prepared with recycled aggregates," Construction and Building Materials, vol. 18, pp. 461-468, 2004.
 A. Katz, "Properties of concrete made with recycled aggregate from partially hydrated old concrete," Cement and Concrete Research, vol. 33, pp. 703-711, 2003.
 V. W. Y. Tam and C. M. Tam, "Parameters for assessing recycled aggregate and their correlation," Waste Management & Research, vol. 27, pp. 52-58, February 1, 2009 2009.
 M. Chakradhara Rao, S. Bhattacharyya, and S. Barai, "Influence of field recycled coarse aggregate on properties of concrete," Materials and Structures, vol. 44, pp. 205-220, 2011.
 N. K. Bairagi, K. Ravande, and V. K. Pareek, "Behaviour of concrete with different proportions of natural and recycled aggregates," Resources, Conservation and Recycling, vol. 9, pp. 109-126, 1993.
 W. Tangchirapat, R. Buranasing, and C. Jaturapitakkul, "Use of High Fineness of Fly Ash to Improve Properties of Recycled Aggregate Concrete," Journal of Materials in Civil Engineering, vol. 22, pp. 565-571, 2010.
 M. G. Alexander and S. Mindess, Aggregates in concrete London ; New York: Taylor & Francis 2005.
 C. Fakitsas, P. Papakonstantinou, P. Kiousis, and A. Savva, "Effects of Recycled Concrete Aggregates on the Compressive and Shear Strength of High-Strength Self-Consolidating Concrete," Journal of Materials in Civil Engineering, vol. 24, pp. 356-361, 2012.
 C. Hoffmann, S. Schubert, A. Leemann, and M. Motavalli, "Recycled concrete and mixed rubble as aggregates: Influence of variations in composition on the concrete properties and their use as structural material," Construction and Building Materials, vol. 35, pp. 701-709, 2012.
 N. Van Tuan, G. Ye, K. van Breugel, A. L. A. Fraaij, and D. D. Bui, "The study of using rice husk ash to produce ultra high performance concrete," Construction and Building Materials, vol. 25, pp. 2030-2035, 2011.