Textural and mechanical characterization of C-S-H gels from hydration of synthetic T1-C<sub>3</sub>S, β-C<sub>2</sub>S and their blends

S. Goñi; A. Guerrero; F. Puertas; M. S. Hernández; M. Palacios; J. S. Dolado; W. Zhu; T. Howind

doi:10.3989/mc.2011.00511

Autores/as

S. Goñi Instituto de Ciencias de la Construcción Eduardo Torroja (IETcc-CSIC) - Materiales de Construcción Nanoestructurados y Ecoeficientes. Unidad Asociada LABEIN-Tecnalia/CSIC.IETcc
A. Guerrero Instituto de Ciencias de la Construcción Eduardo Torroja (IETcc-CSIC) - Materiales de Construcción Nanoestructurados y Ecoeficientes. Unidad Asociada LABEIN-Tecnalia/CSIC.IETcc
F. Puertas Instituto de Ciencias de la Construcción Eduardo Torroja (IETcc-CSIC) - Materiales de Construcción Nanoestructurados y Ecoeficientes. Unidad Asociada LABEIN-Tecnalia/CSIC.IETcc
M. S. Hernández Instituto de Ciencias de la Construcción Eduardo Torroja (IETcc-CSIC)
M. Palacios Institute for Building Materials, ETH Zurich
J. S. Dolado Materiales de Construcción Nanoestructurados y Ecoeficientes. Unidad Asociada LABEIN-Tecnalia/CSIC.IETcc - LABEIN-Tecnalia
W. Zhu University of the West of Scotland
T. Howind University of the West of Scotland

DOI:

https://doi.org/10.3989/mc.2011.00511

Palabras clave:

C3S, C2S, gel C-S-H, caracterización textural y nanoindentación

Resumen

La caracterización textural y mecánica de geles C-S-H formados a partir de la hidratación de muestras puras de T1-C₃S, ß-C₂S y sus mezclas ha sido estudiada por medio de adsorción de nitrógeno y nanoindentación. El área superficial y la nano-porosidad de los geles formados durante la hidratación del ß-C₂S y la mezcla 30-70 (T1-C₃S- ß-C₂S) son mayores que los correspondientes a los geles del T1-C₃S, y la mezcla 70-30; esta diferencia disminuye con el tiempo de hidratación. Estos cambios coinciden con los resultados de nanoindentación que indican un aumento de volumen relativo de las fases C-S-H con una densidad menor en el caso del ß-C₂S y la mezcla 30-70. Al aumentar el tiempo de hidratación, el volumen relativo de fases C-S-H de mayor densidad aumenta a expensas de aquellas de menor densidad. Importantes correlaciones cuantitativas se establecen entre las características texturales y la longitud de cadena media del gel C-S-H, determinada mediante RMN-MAS de ²⁹Si.

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Citas

(1) Taylor, H. F.: "Proposed structure for calcium silicate hydrate gel" J. Am. Ceram. Soc., 73 [6] (1986), pp. 464-467. http://dx.doi.org/10.1111/j.1151-2916.1986.tb07446.x

(2) Richardson, I. G.; Groves, G. W.: "Models for the composition and structure of calcium silicate hydrate (C-S-H) gel in hardened tricalcium silicate pastes" Cem. Conc. Res., 22 (1992), pp. 1001-1010. http://dx.doi.org/10.1016/0008-8846(92)90030-Y

(3) Cong, X.; Kirkpatrick, R. J.: "29Si MAS NMR study of the structure of calcium silicate hydrate" Adv. Cem. Based Mater., 3 (1996), pp. 144-146. http://dx.doi.org/10.1016/S1065-7355(96)90046-2

(4) Nonat, A.; Lecoq, X.: "The structure, stoichiometry and properties of C-S-Hprepared by C3S hydration under controlled conditions" pp. 197-207 in Nuclear Magnetic Resonance Spectroscopy of Cement-Based Materials. Edited by P. Colombet, A. R. Grimmer, H. Zanni and P. Sozzani. Springer, Berlin, 1998.

(5) Chen, J. J.; Thomas, J. T.; Taylor, H. F.; Jennings, H. M.: "Solubility and structure of calcium silicate hydrate" Cem. Conc. Res., 34 (2004), pp. 1499-1519. http://dx.doi.org/10.1016/j.cemconres.2004.04.034

(6) Aligizaki, K. K.: "Pore structure of cement-based materialsâ (Taylor & Francis, Oxon, 2006).

(7) Powers, T. C.; Brownyard, T. L.: "Studies of the Physical Properties of Hardened Portland Cement Paste" J. Amer. Concr. Inst., 18 (2) (1946), pp. 101-132 and 8 (5) (1948), pp. 549-602.

(8) Powers, T. C.; "The Physical Structure and Engineering Properties of Concrete" Portland Cement Association R&D Bull., 90, Chicago (1958).

(9) Brunauer, S.: "Tobermorite gel-The heart of concrete" Am. Scientist, 50 (1)(1962), pp. 211-229.

(10) Feldman, R. F.; Sereda, P. J.: "A Model for Hydrated Potland Cement Paste as Deduced from Sorption Length Change and Mechanical Properties" Mater.Struct., 1(6) (1968), pp. 509-520.

(11) Feldman, R. F.; Sereda, P. J.: "A New Model for Hydrated Portland Cement and its Practical Implications" Eng. J. Can., 53(8/9) (1970), pp. 53-59.

(12) Jennings, H. M.: "A Model for the Microstructure of Calcium Silicate Hydrate in Cement Paste" Cem. Concr. Res., 30 (2000), pp. 101-116. http://dx.doi.org/10.1016/S0008-8846(99)00209-4

(13) Tennis, P. D.; Jennings, H. M.: "A Model for Two Types of C-S-H in the Microstructure of Portland Cement Pastes" Cem. Concr. Res., 30 (2000), pp. 855-863. http://dx.doi.org/10.1016/S0008-8846(00)00257-X

(14) Garci Juenger, M. C.; Jennings, H. M.: "The use of nitrogen adsorption to asses the microstructure of cement paste" Cem. Concr. Res., 31 (2001), pp. 883-892. http://dx.doi.org/10.1016/S0008-8846(01)00493-8

(15) Constantinides, G.; Ulm, F.-J.: "The effect of two types of C-S-H on the elasticity of cement based materials: results from nanoindentation and micromechanical modelling" Cem. Concr. Res., 34 (2004), pp. 67-80. http://dx.doi.org/10.1016/S0008-8846(03)00230-8

(16) Jennings, H. M.; Thomas, J. J.; Gevrenov, J. S.; Constantinides, G.; Ulm, J.: "Nanostructure of C-S-H gel in cement paste as a function of curing conditions and relative humidity, in Creep, Shrinkage and Durability of Concrete and Concrete Structures" Proceedings of CONCREEP-7 (Hermes Science, London, 2005), pp. 19-37.

(17) Jennings, H. M.; Thomas, J. J.; Gevrenov, J. S.; Constantinides, G.; Ulm, F.-J.: "Relating the nanostructure of concrete to engineering properties, in Proceedings of the 2nd International Symposium on Nanotechnology in Construction" ed. A. Porro, Y. de Miguel and P. J. M. Bartos (RILEM, Bilbao 2005).

(18) Thomas, J. J.; Jennings, H. M.: "A colloidal interpretation of chemical aging of the C-S-H gel and its effects on the properties of cement paste" Cem. Concr. Res., 36 (2006), pp. 30-38. http://dx.doi.org/10.1016/j.cemconres.2004.10.022

(19) Jennings, H. M.; Thomas, J. J.; Gevrenov, J. S.; Constantinides, G.; Ulm, F-J.: "A multi-technique investigation of the nanoporosity of cement paste" Cem. Concr. Res., 37(3)(2007), pp. 329-336. http://dx.doi.org/10.1016/j.cemconres.2006.03.021

(20) Guerrero, A.; Goñi, S.; Dolado, J. S.: Modifications of the C-S-H gel by alkaline hydrothermal activation" ACI Materials Journal, april, (2009), pp. 138-143.

(21) Costoya, Fernández, M. M.: "Effect of Particle Size on the Hydration Kinetics and Microstructural Development of Tricalcium Silicateâ. Ph.D. Thesis Work no 4102, Ãcole Polytechnique FÃ©dÃ©rale de Lausanne, 2008.

(22) Zhu, W.; Fontyeyn, M. T. J.; Hughes, J.; Pearce, C.: "Nanoindentation study of resin impregnated sandstone and early-age cement paste specimens" Proceedings of NICOM3, pp 403-408, 2009.

(23) Constantinides, G.; Ulm, F. J., The nanogranular nature of C-S-H. J. Mechanics and Physics of Solids, 55 (2007), pp. 64-90. http://dx.doi.org/10.1016/j.jmps.2006.06.003

(24) Goñi, S.; Puertas, F.; Hernández, M. S.; Palacios, M.; Guerrero, A.; Dolado, J. S.; Zanga, B.; Baroni, F.: "Quantitative study of hydration of C3S and C2S by thermal analysis. Evolution and composition of C-S-H gels formed" J Therm Anal Calorim., 102 (2010), pp. 965-973.

(25) Hernández, M. S.; Goñi, S.; Puertas, F.; Guerrero, A.; Palacios, M.; Dolado, J. S.: "Synergy of T1-C3S and Î²-C2S hydration reactions" J. Amer. Ceram. Soc., 2010 (on line).

(26) Brunauer, S.; Emmett, P. H.; Teller, E.: "Adsorption of gases in multimolecular layers" J. Amer. Chem. Soc. 62 (1940), pp. 723.

(27) Barret, E. P.; Joyner, L. G.; Halenda, P. P.: "The determination of pore volume and area distributions in porous substances" J. Amer Chem. Soc., 73(1951), pp. 373-381. http://dx.doi.org/10.1021/ja01145a126

(28) Harkins, W. D.; Jura, G.: "Vapor Adsorption Method for the Determination of the Area of a Solid without the Assumption of a Molecular Area, and the Areas Occupied by Nitrogen and Other Molecules on the Surface of a Solid" J. Amer. Chem. Soc., 66 (1944), pp. 1366-1373. http://dx.doi.org/10.1021/ja01236a048

(29) Rarick, R. L.; Bhatty, J. I.; Jennings, H. M., in: J. Skalny and S. Mindess (eds.), Materials Science of Concrete IV, Surface area measurements using gas sorption: Application to cement paste. The American Ceramic Society, 1995, pp 1-39.

(30) Characterization of Porous Solids and Powers: Surface Area, Pore Size and Density. Eds. S. Lowell, Joan E. Shields, Martin A. Thomas and Matthias Thommes. Kluwer Academic Publishers (2004).

(31) Livingston, R. A.: "Fractal nucleation and growth model for the hydration of tricalcium silicate" Cem. Concr. Res., 36 (2000), pp.1853-1860. http://dx.doi.org/10.1016/S0008-8846(00)00457-9

(32) Skibsted, J.; Hjorth, J.; Jakobsen, H.: "Correlation between 29Si NMR chemical shifts and mean Si´-O bond lengths for calcium silicates" J. Chem. Phys. Lett., 172 (3-4) (1990), pp. 279-283. http://dx.doi.org/10.1016/0009-2614(90)85403-Y

(33) Kirkpatrick, R. J.; Cong, X.: "An introduction to 27Al and 29Si NMR spectroscopy of cements and concretesâ; pp. 55-76 in Application of NMR spectroscopy to cement science, Edited by. P.Colombet and A. Grimmer. Gordon and Breach science Publishers, Switzerland 1994.

(34) García-Lodeiro, I.: "Compatibilidad de geles cementantes C-S-H y N-A-S-H. Estudios en muestras reales y en polvos sintÃ©ticos" Tesis Doctoral. Universidad Autónoma de Madrid, 2008.

(35) Ulm, F-J.; Vandamme, M.; Bobko, C.; Ortega, J. A.: "Statistical indentation techniques for hydrated nanocomposites: concrete, bones and shale" J. Am. Ceram. Soc., 90(9) (2007), pp. 2677-2692. http://dx.doi.org/10.1111/j.1551-2916.2007.02012.x

(36) Zhu, W.; Hughes, J. J.; Bicanic, N.; Pearce, C.: "Nanoindentation mapping of mechanical properties of cement paste and natural rocks" Mater. Charact, 58(11-12) (2007), pp.1189-1198. http://dx.doi.org/10.1016/j.matchar.2007.05.018