Materials and Structures

, Volume 47, Issue 1–2, pp 351–365 | Cite as

Simulating moisture distribution within concrete pavement slabs: model development and sensitivity study

Original Article

Abstract

This study simulates internal relative humidity (RH) distributions for in-service jointed plain concrete pavement slabs. A one-dimensional isothermal mass transport model is used to predict the concrete slab’s RH distribution through its depth. At the top of the slab, a new statistical algorithm is applied to estimate the occurrences of drying and wetting cycles. During drying cycles, both local wind speed and ambient RH govern the slab surface’s moisture convection. During the wetting cycle, the moisture at the surface is treated as a fixed saturated condition. The feasibility of this model is verified through laboratory observations of internal RH in concrete prisms as well as through field measurements of internal RH for an in-service concrete pavement. Using the developed model, predictions of internal RH distributions of in-service slabs are centered on their sensitivity to local weather conditions, including factors such as the ambient RH, wind speed, and rainfall, especially for slabs in arid regions.

Keywords

Relative humidity (RH) Wetting and drying cycles Wind speed Rainfall Moisture diffusivity Concrete slab 

References

  1. 1.
    Ainsworth M, Oden JT (1997) A posteriori error estimation in finite element analysis. Comput Methods Appl Mech Eng 142(1–2):1–88CrossRefMATHMathSciNetGoogle Scholar
  2. 2.
    Al-Fadhala M, Hover KC (2001) Rapid evaporation from freshly cast concrete and the Gulf environment. Constr Build Mater 15(1):1–7CrossRefGoogle Scholar
  3. 3.
    Bažant Z, Najjar L (1972) Nonlinear water diffusion in nonsaturated concrete. Mater Struct 5(1):3–20Google Scholar
  4. 4.
    Bazant ZP (2001) Prediction of concrete creep and shrinkage: past, present and future. Nucl Eng Des 203(1):27–38CrossRefGoogle Scholar
  5. 5.
    Bazant ZP, Chern J-C et al (1982) Finite element program for moisture and heat transfer in heated concrete. Nucl Eng Des 68(1):61–70CrossRefGoogle Scholar
  6. 6.
    Bazant ZP, Najjar LJ (1971) Drying of concrete as a nonlinear diffusion problem. Cem Concr Res 1(5):461–473CrossRefGoogle Scholar
  7. 7.
    Dalton J (1802) Experimental essays on evaporation. Proc Manch Lit Philos Soc 5:536–602Google Scholar
  8. 8.
    Fife JP, Nokes SE (2002) Evaluation of the effect of rainfall intensity and duration on the persistence of chlorothalonil on processing tomato foliage. Crop Prot 21(9):733–740CrossRefGoogle Scholar
  9. 9.
    Flyhammar P, Bendz D (2006) Leaching of different elements from subbase layers of alternative aggregates in pavement constructions. J Hazard Mater 137(1):603–611CrossRefGoogle Scholar
  10. 10.
    Hall C (1989) Water sorptivity of mortars and concretes: a review. Mag Concr Res 41(147):51–61CrossRefGoogle Scholar
  11. 11.
    Hover KC (2006) Evaporation of water from concrete surfaces. ACI Mater J 103(5):384–389MathSciNetGoogle Scholar
  12. 12.
    Jeong J-H, Zollinger D (2003) Development of test methodology and model for evaluation of curing effectiveness in concrete pavement construction. Trans Res Record: J Transp Res Board 1861(1):17–25Google Scholar
  13. 13.
    Kim J-K, Lee C-S (1999) Moisture diffusion of concrete considering self-desiccation at early ages. Cem Concr Res 29(12):1921–1927CrossRefGoogle Scholar
  14. 14.
    Kohler ER (2005) Experimental mechanics of crack width in full-scale section of continuously reinforced concrete pavements. PhD Desertion, Department of Civil Engineering. Urbana, University of Illinois at Urbana-Champaign, p 173Google Scholar
  15. 15.
    Leech C, Lockington D et al (2003) Unsaturated diffusivity functions for concrete derived from NMR images. Mater Struct 36(6):413–418CrossRefGoogle Scholar
  16. 16.
    Li C, Li K et al (2008) Numerical analysis of moisture influential depth in concrete and its application in durability design. Tsinghua Sci Technol 13(Supplement 1):7–12CrossRefGoogle Scholar
  17. 17.
    Mather B (1985) Discussion on paper by Z. Berhane: “Evaporation of Water from Fresh Mortar and Concrete at Different Evironmental Conditions”. ACI J 82(6):931–932Google Scholar
  18. 18.
    Menabde M, Seed A et al (1997) Self-similar random fields and rainfall simulation. J Geophys Res Atmosphere 102(D12):13509–13515Google Scholar
  19. 19.
    Shoukry SN, William GW et al (2011) Effect of moisture and temperature on the mechanical properties of concrete. Constr Build Mater 25(2):688–696CrossRefGoogle Scholar
  20. 20.
    Sivapalan M, Blöschl G (1998) Transformation of point rainfall to areal rainfall: Intensity-duration-frequency curves. J Hydrol 204(1–4):150–167CrossRefGoogle Scholar
  21. 21.
    Uno PJ (1998) Plastic shrinkage cracking and evaporation formulae. ACI Mater J 95(4):365–375Google Scholar
  22. 22.
    West RP, Holmes N (2005) Predicting moisture movement during the drying of concrete floors using finite elements. Constr Build Mater 19(9):674–681CrossRefGoogle Scholar
  23. 23.
    Western-Regional-Climate-Center (2010) Historical Climate Information. from http://www.wrcc.dri.edu/CLIMATEDATA.html
  24. 24.
    Xi Y, Bažant ZP et al (1994) Moisture diffusion in cementitious materials: adsorption isotherms. Adv Cem Based Mater 1(6):248–257CrossRefGoogle Scholar
  25. 25.
    Yuan Y, Wan ZL (2002) Prediction of cracking within early-age concrete due to thermal, drying and creep behavior. Cem Concr Res 32(7):1053–1059CrossRefGoogle Scholar

Copyright information

© RILEM 2013

Authors and Affiliations

  1. 1.Faculty of EngineeringChina University of GeosciencesWuhanChina
  2. 2.Department of Civil and Environmental EngineeringMichigan Technological UniversityHoughtonUSA

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