Abstract
How far the concrete can be used as finishing material depends on how smooth it can be. In this work an ultra smooth concrete surface is fabricated with a method taking use of the nano granular nature of Calcium Silicate Hydrate (C-S-H) i.e. the main hydration product of cement. The reflection of people in the concrete “mirror” could be recognized, there is no defect except some small splashes found on the surface of this concrete when it was observed with optical microscopy, the surface of this concrete is covered with nano particles of Calcium Silicate Hydrates (C-S-H) sized around 10 nm when characterized by FSEM and AFM, the C-S-H nano granular particles incline to agglomerate into groups. The mean roughness of the concrete surface is around 1–10 nm when quantified with AFM in a scanning area of 1.0 × 1.0 μm2, its micro hardness is around 45 MPa.
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References
Andrew JA, Thomas JJ, Jennings MH (2007) Composition and density of nano scale calcium silicate hydrate in cement. Nat Mater 35(6):311–316
Jennings MH (2008) Refinements to colloid model of C-S-H in cement: CM-II. Cem Concr Res 38(2):275–289
Scherer GW (1999) Structure and properties of gels. Cem Concr Res 29(6):1149–1157
Taylor HFW (1993) Nano scale microstructure of C-S-H: current status. Adv Cem Mater 1(1):38–46
Constantinides G, Ulm FJ (2007) The nanogranular nature of C-S-H. J Mech Phys Solids 55(1):64–90
Shen WG, Xiao LQ A new method to prepare mirror like smooth concrete. Chinese Patent ZL200710052826.2
Lesko SI, Lesniewska E, Nonat A, Mutin JC (2001) Investigation by atomic force microscopy of forces at the origin of cement cohesion. Ultramicroscopy 86(1):11–16
Arnault JC, Knoll A, Smigiel E, Cornet A (2001) Roughness fractal approach of oxidised surfaces by AFM and diffuse X-ray re-ectometry measurements. Appl Surf Sci 171(2):189–196
Ulm FJ, Vandamme M, Bobko C et al (2007) Statistical indentation techniques for hydrated nanocomposite concrete, bone and shale. Georgios Constantinides. J Am Ceram Soc 90(9):2677–2692
Richardson IG (2008) The calcium silicate hydrates. Cem Concr Res 38(1):137–142
Double DD, Hellawell A (1976) The hydration of Portland cement. Nature 261(10):486–488
Nonat A (2004) The structure and stoichiometry of C-S-H. Cem Concr Res 34(8):1521–1528
Pellenq RJ-M, Lequeux N, van Damme H (2008) Engineering the bonding scheme in C-S-H: the iono-covalent framework. Cem Concr Res 38(2):159–174
Mendez-Vilas A, Bruque JM, Gonza M, Martin L (2007) Sensitivity of surface roughness parameters to changes in the density of scanning points in multi-scale AFM studies. Application to a biomaterial surface. Ultramicroscopy 107(4):617–625
Mahalia M, Christopher B, Matthieu V (2008) Surface roughness criteria for cement paste nanoindentation. Cem Concr Res 38(4):467–476
Acknowledgments
We deeply thank Professor Hamlin Jennings at Northwestern University for helpful discussion. This project is financially supported by 973 Project (No: 2009CB23201) and the Open Foundation of National Key Laboratory of Green Building Materials (CBM-08-KF103).
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Shen, W., Gan, G., Dong, R. et al. Fabrication and characterization of nano colloid surfaced concrete. Mater Struct 44, 1559–1564 (2011). https://doi.org/10.1617/s11527-011-9718-9
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DOI: https://doi.org/10.1617/s11527-011-9718-9