TY - JOUR AU - Goñi, S. AU - Guerrero, A. AU - Puertas, F. AU - Hernández, M. S. AU - Palacios, M. AU - Dolado, J. S. AU - Zhu, W. AU - Howind, T. PY - 2011/06/30 Y2 - 2024/03/29 TI - Textural and mechanical characterization of C-S-H gels from hydration of synthetic T1-C3S, β-C2S and their blends JF - Materiales de Construcción JA - Mater. constr. VL - 61 IS - 302 SE - Research Articles DO - 10.3989/mc.2011.00511 UR - https://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/629 SP - 169-183 AB - The textural and mechanical characterization of C-S-H gels formed from the hydration of pure T1-C<sub>3</sub>S, β-C<sub>2</sub>S and their blends are studied by Nitrogen sorption and nanoindentation experiments. The surface area and nanoporosity of C-S-H gels formed from the hydration of β-C<sub>2</sub>S and the 30-70 (T1-C<sub>3</sub>S and β-C<sub>2</sub>S mixture) are higher than those from hydration of T1-C<sub>3</sub>S, and 70-30, with the difference decreasing with hydration age. Such changes are well supported by findings of nanoindentation study, which shows the greater relative volume of C-S-H phases with lower densities in the β-C<sub>2</sub>S and the 30-70 pastes. With the increase in hydration age, the relative volume of C-S-H phases with higher densities increased at the expenses of those with lower density. Important quantitative correlations were found among these textural characteristics and the mean chain length, determined from <sup>29</sup>Si magic-angle-spinning (MAS) NMR, of the C-S-H gels. ER -