The effect of Temperature on the Convection Zone of Concrete (Experimental-Numerical Study)

Authors

1 Faculty of Concrete Technology Department, Road, Housing & Urban Development Research Center (BHRC), Tehran, Iran

2 Faculty of Civil Engineering, University of Tehran, Tehran, Iran

Abstract

The durability-based design of reinforced concrete structures especially in hot marine environment of Bandar-Abbas became extensively important during the last few years. It has been known that the durability of concrete mainly depends on how easily seawater containing chloride ions can ingress into an unsaturated concrete (Sabir et al., 1998; Hubert et al., 2003; Prabakar et al., 2010; Yoo et al., 2011). Chloride-induced corrosion of embedded reinforcement is more severe in tidal condition because of more ingress of chloride due to moisture convection phenomena. (Broomfield, 1997; Olajumok et al., 2009; Akindahunsi et al., 2010).
In is necessary to approximate the moisture distribution in concrete due to wetting and drying cycles for determination of the moisture convection zone. The moisture transfer coefficient (MTC) is one of the most important parameters for prediction of moisture distribution. The moisture distribution is often influenced by environmental conditions such as temperature. The changes of the depth of convection zone can be assessed if MTC is available in various temperatures.
In this research, six concrete mixtures were prepared in which four plain concrete mixtures were proportioned with water to cementitious materials (w/cm) ratios of 0.40, 0.45, 0.50, and 0.55. In addition to the plain concretes, one silica fume and one natural zeolite blended concrete mixtures with cement replacement levels of 7.5, and 10% and a w/cm ratio of 0.45 were considered. The moisture loss or water absorption of specimens exposed to wetting and drying were measured using the gravimetric method at temperatures of 23, 43, and 63 ºC. A finite element analysis was performed afterward to fit the experimental data to the governing equations of moisture transfer to determine the MTC. The moisture distribution of concrete exposed to wetting and drying and then the depth of convection zone (DCZ) are determined using approximated MTC and finite element-based model. The amount of water entered (AWE) to concrete surface subjected to tidal condition is also calculated.

Keywords

References

طریقت ا، افضلی­ننیز ا، "بررسی خواص مکانیکی و برخی شاخص‌های دوام بتن حاوی ریزالیاف ولاستونیت و پوزولان میکروسیلیس"، نشریه مهندسی عمران و محیط زیست، 1396، 47 (3)، 1-7.
شکرچی‌زاده م، فراهانی ع، تدین م‌ ح، خاقانپور ر، "بررسی بلندمدت نفوذپذیری یون کلراید در آزمونه‌های حاوی متاکائولن در شرایط رویارویی پاشش در جزیره قشم"، نشریه مهندسی عمران و محیط زیست، 1395، 46 (3)، 31-41.
Akindahunsi A, Falade FA, Afolayan JO, Oke IA, “Characterization and Mathematical Modeling of Chloride Diffusion in Lagos Coastal Waters”, Journal of Failure Analysis and Prevention, 2010, 10 (3), 169-177.

Andrade C, Alonso C, “Progress on design and residual life calculation with regard to rebar corrosion of reinforced”, In Neal Berke, Edward Escalante, Charles Nmai, and David Whiting (Eds.), Techniques to Asses the Corrosion Activity of Steel Reinforced Concrete Structures, ASTM STP 1276, 1996, 23-40.

Andrade C, Diez JM, Alonso C, “Mathematical modeling of a concrete surface skin effect on diffusion in chloride contaminated media”, Advanced Cement Based Materials, 1997, 6 (2), 39-44.
Nilsson LO, Andersen A, Tang L, Utgenannt P, “Chloride ingress data from field exposure in a Swedish road environment”, In: Andrade, Joerg Kröpp, editors. Proceedings of 2nd international RILEM workshop on testing and modelling chloride ingress into concrete, Paris: RILEM, 2000.
Andrade C, Sagrera JL, Sanjuán MA, “Several years study on chloride ion penetration into concrete exposed to Atlantic Ocean water”, In: Carmen Andrade , Joerg Kröpp, editors. Proceedings of 2nd international RILEM workshop on testing and modelling chloride ingress into concrete, Paris: RILEM, 2000.
Ayano T, Wittmann FH, “Drying, moisture distribution, and shrinkage of cement-based materials”, Materials and Structures, 2002, 35 (3), 34-40.
Baroghel-Bouny V, Thiéry M, Wang X, “Modelling of isothermal coupled moisture–ion transport in cementitious materials”, Cement and Concrete Research, 2011, 41 (8), 828-841.
Bazant ZP, Najjar LJ, “Nonlinear water diffusion in nonsaturated concrete”, Materials and Structures, 1972, 5 (25), 3-20.
Bazant ZP, “Mathematical Modeling of Creep and Shrinkage of Concrete”, John Wiley & Sons, London, UK, 1988.
Broomfield JP, Corrosion of steel in concrete, E & FN Spon, London, 1997.
Brunauer S, Emmett PH, Teller E, “Adsorption of Gases in Multimolecular Layers”, Journal of the American Chemical Society, 1938, 60 (2), 309-319.
Buchwald A, “Determination of the ion diffusion coefficient in moisture and salt loaded masonry materials by impedance spectroscopy”, The third international symposium, Vienna, Austria, 2000, 475-482.
Carpenter TA, Davies ES, Hall C, Hall LD, Hoff WD, Wilson MA, “Capillary water migration in rock: process and material properties examined by NMR imaging”, Materials and Structures, 1993, 26 (5), 286-292.
Castro P, Rincón OT, Pazini EJ, “Interpretation of chloride profiles from concrete exposed to tropical marine environments”, Cement and Concrete Research, 2001, 31 (4), 529-537.
Conciatori D, Brühwiler E, Gysler R, “Brine Absorption in Concrete at Low Temperature: Experimental Investigation and Modeling”, Journal of Materials in Civil Engineering, 2011, 23 (6), 846-851.
Chunqiu L, Kefei K, Zhaoyuan C, “Numerical Analysis of Moisture Influential Depth in Concrete and Its Application in Durability Design”, Tsinghua Science and Technology, 2008, 13(S1), 7-12.
Claisse PA, Eisayad BI, Shaaban IG, “Absorption and sorptivity of cover concrete”, Journal of Materials in Civil Engineering, ASCE, 1997, 9 (3), 105-110.
Crank J, “The mathematics of diffusion”, 2nd Ed, Oxford, Clarendon Press, 1975.
Dietl C, Winter E, Viskanta R, “An efficient simulation of heat and mass transfer processes during drying of capillary porous hygroscopic materials”, International Journal of Heat and Mass Transfer, 1998, 41 (22), 3611-3625.
Dousti A, Shekarchi M, Alizadeh R, Taheri-Motlagh A, “Binding of externally supplied chlorides in micro silica concrete under field exposure conditions”, Cement and Concrete Composites, 2011, 33 (10), 1071-1079.
Haque MN, Al-Khaiat H, John B, “Climatic zones- a prelude to designing durable concrete structures in the Arabian Gulf”, Building and Environment, 2007, 42 (6), 2410-2416.
Hubert F X, Burlion N, Shao JF, “Drying of concrete: modeling of a hydric damage”, Materials and Structures, 2003, 36 (1), 12-21.
Idiart AE, Lopez CM, Carol I, “Modeling of drying shrinkage of concrete specimens at the meso-level”, Materials and Structures, 2011, 44 (2), 415-435.
Iqbal PO, Ishida T, “Modeling of chloride transport coupled with enhanced moisture conductivity in concrete exposed to marine environment”, Cement and Concrete Research, 2009, 39 (4), 329-339.
Janz M, “Moisture diffusivities evaluated at high moisture levels from a series of water absorption tests”, Materials and Structures, 2002, 35 (3), 141-148.
Kodikara J, Chakrabarti S, “Modeling of Moisture Loss in Cementitiously Stabilized Pavement Materials”, International Journal of Geomechics, 2005, 5 (4), 295-303.
Martin-Perez B, “Service life modelling of R.C. highway structures exposed to chlorides”, PhD thesis, university of Toronto, 1999.
Martin-Perez B, Pantazopoulou SJ, Thomas MDA, “Numerical solution of mass transport equations in concrete structures”, Computers and Structures, 2001, 79 (13), 1251-1264.
Martys N, Ferraris CF, “Capillary transport in mortar and concrete”, Cement and Concrete Research, 1997, 27 (5), 747-760.
McCarter WJ, “Influence of surface finish on sorptivity on concrete”, Journal of Materials in Civil Engineering, ASCE, 1993, 5 (1), 130-136.
Mukhopadhyaya P, Kumaran K, Normandin N, Goudreau P, “Effect of surface temperature on water absorption coefficient of building materials”, Journal of Building Physics, 2002, 26 (2), 179-195.
Navarri P, Andrieu J, “High-intensity infrared drying study: part II. Case of thin coated films”, Chemical Engineering and Process: Process Intensification, 1993, 32 (5), 319-325.
Nemati Chari M, Shekarchi M, Ghods P, Moradian M, “A simple practical method for determination of moisture transfer coefficient of mature concrete using a combined experimental-numerical approach”, Computers and Concrete, 2016, 18, 367-388.
Nemati Chari M, Shekarchi M, Sobhani J, Nemati Chari M, “The effect of temperature on the moisture transfer coefficient of cement-based mortars: an experimental investigation”, Construction and Building Materials, 2016, 102, 306-317.
Nemati Chari M, Shekarchi M, “A Simplified Method for Determination of the Moisture Transfer Coefficient of Concrete”, International Journal of Civil Engineering, 2017, 15 (8), 1131-1142.
Nemati Chari M, Shekarchi M, Tadayon MH, Moradian M “Prediction of chloride ingress into blended cement concrete: Evaluation of a combined short-term laboratory-numerical procedure”, Construction and Building Materials, 2018, 162, 649-662.
Nguyen TQ, Petkovic J, Dangla P, Baroghel-Bouny V, “Modelling of coupled ion and moisture transport in porous building materials”, Construction and Building Materials, 200, 22 (11), 2185-2195.
Olajumoke AM, Oke IA, Fajobi AB, Ogedengbe MO, “Engineering failure analysis of a failed building in Osun State, Nigeria”, Journal of Failure Analysis and Prevention, 2009, 9 (1), 8-15.
Prabakar J, Devadas Manoharan P, Chellappan A, “Diffusion characteristics of OPC concrete of various grades under accelerated test conditions”, Construction and Building Materials, 2010, 24 (3), 346-352.
Prazak J, Tywoniak J, Peterka F, Slonc T, “Description of transport of liquid in porous media-a study based on neutron radiography data”, International Journal of Heat and Mass Transfer, 1990, 33 (6), 1105-1120.
Sabir BB, Wild S, O'Farrell M, “A water sorptivity test for mortar and concrete”, Materials and Structures, 1998, 31 (8), 568-574.
Samson E, Maleki K, Marchand J, Zhang T, “Determination of the water diffusivity of concrete using drying/absorption test results”, Journal of ASTM International, 2008, 5 (7), 1-12.
Shekarchi M, Bonakdar A, Bakhshi M, Mirdamadi A, Mobasher B, “Transport properties in metakaolin blended concrete”, Construction and Building Materials, 2010, 24 (11), 2217-2223.
Temperley TG, “Corrosion phenomena in the Coastal areas of the Persian Gulf”, Corrosion Science, 1965, 5 (8), 581-589.
Tuutti K, “The effect of individual parameters on chloride corrosion”, In Nilsson L. O. (Ed.), Chloride Penetration Into Concrete Structures, pp. 18-12, Goteborg, Sweden.
Xi Y, Bazant ZP, Molina L, Jennings HM, “Moisture Diffusion in cementitious materials-Adsorption isotherm”, Advanced Cement Based Materials, 1994, 1 (6), 248-257.
Yang Z, Weiss WJ, Olek J, “Water transport in concrete damaged by tensile loading and freeze-thaw cycling”, Journal of Materials in Civil Engineering, 2006, 18 (3), 424-434.
Yoo JH, Lee HS, Ismail MA, “An analytical study on the water penetration and diffusion into concrete under water pressure”, Construction and Building Materials, 2011, 25 (1), 99-108.
 
Journal of Civil and Environmental Engineering
Volume 50.3, Issue 100 - Serial Number 100
Autumn of 2020
December 2020
Pages 69-81

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