Abstract
Engineering application processes of fresh concrete include transporting, pumping, formwork casting, etc. Each process is a significant factor influencing properties of fresh and hardened concrete. However, many contradicting requirements of fresh concrete performances (such as structuration rate) exist in these operation processes. Therefore, advanced techniques need to be proposed to satisfy future challenges. Actively controlling the stiffness by applying external magnetic fields would be a potential solution for the contradicting requirements, and could make the pumping and casting processes smarter and more reliable. In the present paper, the effects of magnetic field strength and magnetizing time on structural build-up of cementitious paste are discussed. The results show that higher magnetic field strengths result in higher percolation time and lower phase angle at equilibrium state. However, the application of external magnetic fields with low flux density has little effects on the viscoelastic behaviour of cementitious paste. Under high magnetic field strengths, the viscous-liquid behaviour dominates the elastic-solid behaviour at early stage, while the solid-like behaviour becomes more dominant with magnetizing time.
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References
De Schutter G (2017) Thixotropic effects during large-scale concrete pump tests on site. In: 71st RILEM annual week & ICACMS 2017, Chennai, India
Roussel N, Cussigh F (2008) Distinct-layer casting of SCC: the mechanical consequences of thixotropy. Cem Concr Res 38:624–632
Ovarlez G, Roussel N (2006) A physical model for the prediction of lateral stress exerted by self-compacting concrete on formwork. Mater Struct 39:269–279
Roussel N (2006) A thixotropy model for fresh fluid concretes: theory, validation and applications. Cem Concr Res 36:1797–1806
De Schutter G, Lesage K (2018) Active control of properties of concrete: a (p)review. Mater Struct 51:123
De Schutter G, Lesage K, Mechtcherine V et al (2018) Vision of 3D printing with concrete - technical, economic and environmental potentials. Cem Concr Res 112:25–36
Nair SD, Ferron RD (2014) Set-on-demand concrete. Cem Concr Res 57:13–27
Jiao D, Shi C, Lesage K, et al (2018) Rheological behavior of cement paste under magnetic field. In: National civil engineering forum for graduate students (NCEF 2018)
EN TS 196-1 (2005) Methods of testing cement–Part 1: Determination of strength, European Committee for standardization, 26
Nachbaur L, Mutin J, Nonat A et al (2001) Dynamic mode rheology of cement and tricalcium silicate pastes from mixing to setting. Cem Concr Res 31:183–192
Roussel N, Ovarlez G, Garrault S et al (2012) The origins of thixotropy of fresh cement pastes. Cem Concr Res 42:148–157
Yuan Q, Zhou D, Khayat KH et al (2017) On the measurement of evolution of structural build-up of cement paste with time by static yield stress test vs. small amplitude oscillatory shear test. Cem Concr Res 99:183–189
Yazdi NA, Arefi MR, Mollaahmadi E et al (2011) To study the effect of adding Fe2O3 nanoparticles on the morphology properties and microstructure of cement mortar. Life Sci J 8:550–554
Sikora P, Horszczaruk E, Cendrowski K et al (2016) The influence of Nano-Fe3O4 on the microstructure and mechanical properties of cementitious composites. Nanoscale Res Lett 11:182
Jiao D, Shi C, Lesage K, et al (2018) Effects of external magnetic field on structural evolution of cement paste with nano-Fe3O4. In: 2nd international conference on UHPC materials and structures (UHPC 2018), Fuzhou, China, pp 344–348
Rankin PJ, Horvath AT, Klingenberg DJ (1999) Magnetorheology in viscoplastic media. Rheol Acta 38:471–477
Ginder JM (2003) Rheology controlled by magnetic fields, digital encyclopedia of applied physics
Mostafa AM, Yahia A (2016) New approach to assess build-up of cement-based suspensions. Cem Concr Res 85:174–182
Acknowledgement
The authors acknowledge the financial support given by the European Research Council (ERC) for the Advanced Grant Project ‘SmartCast’ (No. 693755) awarded to Prof. Geert De Schutter.
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Jiao, D., El Cheikh, K., Lesage, K., Shi, C., De Schutter, G. (2020). Structural Build-Up of Cementitious Paste Under External Magnetic Fields. In: Mechtcherine, V., Khayat, K., Secrieru, E. (eds) Rheology and Processing of Construction Materials. RheoCon SCC 2019 2019. RILEM Bookseries, vol 23. Springer, Cham. https://doi.org/10.1007/978-3-030-22566-7_5
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DOI: https://doi.org/10.1007/978-3-030-22566-7_5
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