Advances in concrete construction

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Development of reference materials for mortar: Determination of the components and relation with mixing ratio

  • Lim, Dong Kyu (Department of Civil and Environmental Engineering, Dankook University) ;
  • Choi, Myoung Sung (Department of Civil and Environmental Engineering, Dankook University)
  • Received : 2020.08.28
  • Accepted : 2020.10.12
  • Published : 2020.11.25
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Abstract

This study aimed to develop reference materials (RMs) for mortar that can simulate the initial flow characteristics with constant quality over a long period. Through the previous research on the development of RMs for cement paste, the combination of limestone, glycerol, and water was used as the basic matrix for developing RMs for mortar in this study. In addition, glass beads of three particle sizes (0.5, 1.0, and 2.0 mm) and ISO standard sand were selected as tentative candidates to derive fine aggregate substitutes. The mixture of glass beads could simulate the initial flow characteristics of mortar, but under the same mixing ratio, replicates showed an unstable tendency to indicate inconsistent values due to the generation of electrostatic properties between materials and equipment. On the other hand, the mixture using ISO standard Sand not only simulates the constant flow characteristics for a long period of time, but also shows stable results with little error in replicates. Therefore, limestone, glycerol, ISO standard sand, and water were finally determined as components that met the required properties of RMs for mortar. The effect of each component on the flow characteristics of RMs was analyzed. It was found that glycerol increased the cohesion between the particles of standard sand, resulting in a constant increase both in the plastic viscosity and yield stress. Both limestone and standard sand had a dominant effect on the yield stress. The relationships between various mortar mixing ratios and the corresponding mixing ratios of RMs were established. In addition, the results of the verification experiment showed that the rheological properties of the RMs obtained through the relationships correlated with various water/cement ratios and the fine aggregate volume fractions of mortar obtained with same manner. In other words, the RMs for mortar developed in this study can be used as standard samples because they can simulate the initial flow characteristics of mortar of various mixing ratios for a long period without any chemical changes.

Keywords

Acknowledgement

This research was supported by a grant (20AUDP-B147701-06) from Architecture & Urban Development Research Program funded by Ministry of Land, Infrastructure and Transport of Korean Government.

References

  1. Banfill, P.F.G. (2016), "The rheology of fresh cement and concrete", British Soc. Rheology, 61-130.
  2. Bingham, E.C. (1922), Fluidity and Plasticity, Vol. 2, McGraw-Hill.
  3. Cao, G., Zhang, H., Tan, Y., Wang, J., Deng, R., Xiao, X. and Wu, B. (2015), "Study on the effect of coarse aggregate volume fraction on the flow behavior of fresh concrete via DEM", Procedia Eng., 102, 1820-1826. https://doi.org/10.1016/j.proeng.2015.01.319.
  4. Choi, M.S., Kim, Y.J., Jang, K.P. and Kwon, S.H. (2014), "Effect of the coarse aggregate size on pipe flow of pumped concrete", Constr. Build. Mater, 66, 723-730. https://doi.org/10.1016/j.conbuildmat.2014.06.027.
  5. Ciborowski, J. and Wlodarski, A. (1962), "On electrostatic effects in fluidized beds", Chem. Eng. Sci., 17, 23-32. https://doi.org/10.1016/0009-2509(62)80003-7.
  6. Daniel, R.C., Poloski, A.P. and Saez, A.E. (2008), "Vane rheology of cohesionless glass beads", Powder. Technol., 181, 237-248. https://doi.org/10.1016/j.powtec.2007.05.003.
  7. Esteves, L.P., Cachim, P.B. and Ferreira, V.M. (2010), "Effect of fine aggregate on the rheology properties of high performance cement-silica systems", Constr. Build. Mater., 24, 640-649. https://doi.org/10.1016/j.conbuildmat.2009.11.005.
  8. Faleschini, F., Jimenez, C., Barra, M., Aponte, D., Vazquez, E. and Pellegrino, C. (2014), "Rheology of fresh concretes with recycled aggregates", Constr. Build. Mater., 73, 407-416. https://doi.org/10.1016/j.conbuildmat.2014.09.068.
  9. Farris, R.J. (1968), "Prediction of the viscosity of multi-modal suspensions from unimodal viscosity data", Tran. Soc. Rheol., 12, 281-301. https://doi.org/10.1122/1.549109.
  10. Ferraris, C.F. (1999), "Measurement of the rheological properties of cement paste: A new approach", Proceedings of the RILEM International Symposium on the Role of Admixtures in High Performance Concrete Monterrey, Mexico, 21-26.
  11. Ferraris, C.F. and Gaidis, J.M. (1992), "Connection between the rheology of concrete and rheology of cement paste", ACI. Mater., 89, 388-393.
  12. Ferraris, C.F., Nicos, S.M., Peltz, M., William, L.G., Edward, J.G. and Toman, B. (2019), "Certification of SRM 2497: Standard reference concrete for rheological measurements" , NIST SP 260 #194, National Institute of Standards and Technology, Gaithersburg, MD, USA, April.
  13. Feys, D., Cepuritis, R., Jacobsen, S., Lesage, K., Secrieru, E. and Yahia, A. (2017), "Measuring rheological properties of cement paste. Most common techniques, procedures and challenges", RILEM Tech. Lett., 2, 129-135. http://dx.doi.org/10.21809/rilemtechlett.2017.43.
  14. Han, C.G., Lee, C.G. and Heo, Y.S. (2016), "A comparison study between evaluation method on the rheological properties of cement paste", Korea Inst. Build. Constr., 21, 75-82.
  15. Hoyle, C., Dai, S., Tanner, R. and Jabbarzadeh, A. (2020), "Effect of particle roughness on the rheology of suspensions of hollow glass microsphere particles", Non-Newtonian Fluid Mech., 276, 104235. https://doi.org/10.1016/j.jnnfm.2020.104235.
  16. Hwang, H.J., Lee, S.H. and Lee, W.J. (2007), "Effect of particle size distribution of binder on the rheological properties of slag cement pastes", Korea. Ceram. Soc., 44, 6-11. https://doi.org/10.4191/kcers.2007.44.1.006.
  17. Khandavalli, S. and Rothstein, J.P. (2014), "Extensional rheology of shear-thickening fumed silica nano-particles dispersed in an aqueous polyethylene oxide solution", Rheol., 58, 411-431. https://doi.org/10.1122/1.4864620.
  18. Kim, I.S., Choi, S.Y. and Yang, E.I. (2018), "Evaluation of durability of concrete substituted heavyweight waste glass as fine aggregate", Constr. Build. Mater., 184, 269-277. https://doi.org/10.1016/j.conbuildmat.2018.06.221.
  19. Kulasegarm, S., Karihaloo, B.L. and Ghanbari, A. (2011), "Modeling the flow of self-compacting concrete", Int, Numer. Anal. Meth. Geomech., 35, 713-723. https://doi.org/10.1002/nag.924.
  20. Lee, D.K. and Choi, M.S. (2018a), "Standard reference materials for cement paste, Part I: Suggestion of constituent materials based on rheological analysis", Mater., 11, 624. https://doi.org/10.3390/ma11040624.
  21. Lee, D.K. and Choi, M.S. (2018b), "Standard reference materials for cement paste, Part II: Determination of mixing ratios", Mater., 11, 861. https://doi.org/10.3390/ma11050861.
  22. Lee, D.K. and Choi, M.S. (2018c), "Standard reference materials for cement paste, Part III: Analysis of the flow characteristics for the developed standard reference material according to temperature change", Mater., 11, 2001. https://doi.org/10.3390/ma11102001.
  23. Lee, D.K. and Choi, M.S. (2020), "Development of reference materials for cement paste", Adv. Concrete. Constr., 9(6), 547-556. https://doi.org/10.12989/acc.2020.9.6.547.
  24. Lee, D.K., Lee, K.W. and Choi, M.S. (2018e), "Study on filling capacity of self-consolidating concrete for modular LNG storage tank", Korean Soc. Saf., 33, 50-57.
  25. Lee, D.K., Lee, K.W., Park, G.J., Kim, S.W., Park, J.J., Kim, Y.J. and Choi, M.S. (2018d), "Guideline for filling performance of concrete for modular LNG storage tanks", Korean Soc. Saf., 33, 86-93.
  26. Lee, K.W., Lee, H.J. and Choi, M.S. (2019), "Evaluation of 3D concrete printing performance from a rheological perspective", Adv. Concrete. Constr., 8(2), 155-163. http://dx.doi.org/10.12989/acc.2019.8.2.155.
  27. Mostafizur, R.M., Abdul Aziz, A.R., Saidur, R., Bhuiyan, M.H.U. and Mahbubul, I.M. (2014), "Effect of temperature and volume fraction on rheology of methanol based nanofluids", Heat Mass Transf., 77, 765-769. https://doi.org/10.1016/j.ijheatmasstransfer.2014.05.055.
  28. Olivas, A., Ferraris, C.F., Guthrie, W.F. and Toman, B. (2015), "Re-certification of SRM 2492: Bingham paste mixture for rheological measurements", NIST SP-260-182, National Institute of Standards and Technology: Gaithersburg, MD, USA, August.
  29. Olivas, A., Ferraris, C.F., Martys, S.N., William, L.G., Edward, J.G. and Toman, B. (2017), "Certification of SRM2493: Standard reference mortar for rheological measurements", NIST-SP-260-187, National Institute of Standard Sand Technology, Gaithersburg, MD, USA.
  30. Poslinski, A.J., Ryan, M.E., Gupta, R.K., Seshadri, S.G. and Frechette, F.J. (1988), "Rheological behavior of filled polymeric systems 1. Yield stress and shear-thinning effects", Rheol., 32, 703-735. https://doi.org/10.1122/1.549987.
  31. Rashad, A. (2016), "Cementitious materials and agricultural wastes as natural fine aggregate replacement in conventional mortar and concrete", Build. Eng., 5, 119-141. https://doi.org/10.1016/j.jobe.2015.11.011.
  32. Rashed, A. (2014), "Recycled waste glass as fine aggregate replacement in cementitious materials based on Portland cement", Constr. Build. Mater., 72, 340-357. https://doi.org/10.1016/j.conbuildmat.2014.08.092.
  33. Roussel, N. (2012), Understanding the Rheology of Concrete, Woodhead, USA.
  34. Roussel, N., Lemaitre, A., Flatt, R.J. and Coussot, P. (2010), "Steady state flow of cement suspensions. A micro mechanical state of the art", Cement Concrete Res., 40, 77-84. https://doi.org/10.1016/j.cemconres.2009.08.026.
  35. Struble, L.J. and Lei, W.G. (1995), "Rheological changes associated with setting of cement paste", Adv. Cement Bas. Mater., 2, 224-230. https://doi.org/10.1016/1065-7355(95)90041-1.
  36. Uchikawa, H., Ogawa, K. and Uchida, S. (1985), "Influence of character of clinker on the early hydration process and rheological property of cement paste", Cement Concrete Res., 15, 561-572. https://doi.org/10.1016/0008-8846(85)90053-5.
  37. Wolny, A. and Kazmierczak, W. (1993), "The influence of static electrification on dynamics and rheology of fluidized bed", Chem. Eng. Sci., 48(20), 3529-3534. https://doi.org/10.1016/0009-2509(93)85008-D.
  38. You, N., Liu, Y., Gu, D., Ozbakkaloglu, T., Pan, J. and Zhang, Y. (2019), "Rheology, shrinkage and pore structure of alkali-activated slag-fly ash mortar incorporating copper slag as fine aggregate", Constr. Build. Mater., 242, 118029. https://doi.org/10.1016/j.conbuildmat.2020.118029