• Effects of sulfates on the hydration of Portland cement – A review 

      Andrade Neto, José da Silva; Kirchheim, Ana Paula; Gomez-de-la-Torre, Maria de los Angeles (2021)
      Presented within is a critical overview of the effect of sulfates on cement hydration, properties, and optimum sulfate content in Portland cement. Calcium sulfate is used in Portland cement to control the C3A reaction ...
    • Hydration and interactions between pure and doped C3S and C3A in the presence of different calcium sulfates 

      Andrade Neto, José da Silva; de Matos, Paulo R.; Gomez-de-la-Torre, Maria de los Angeles; Campos, Carlos E. M.; Torres, Sandro M.; [et al.] (2022)
      This research studied the hydration of C3S-C3A-calcium sulfate systems made of combinations of two C3S (pure triclinic and Al-doped monoclinic), two C3A (pure cubic C3A and Na-doped orthorhombic), and two calcium sulfates ...
    • Hydration of C3S and Al-doped C3S in the presence of gypsum 

      Andrade Neto, José da Silva; Rodríguez, Erick D.; Monteiro, Paulo J. M.; Gomez-de-la-Torre, Maria de los Angeles; Kirchheim, Ana Paula (sciencedirect, 2022)
      A complete understanding of the effect of gypsum on the C3S hydration and the role of aluminum has not been achieved. The effects of gypsum (at 2.5 wt% and 5.0 wt%) on the hydration of tricalcium silicate (C3S) and aluminum-doped ...
    • In-situ laboratory X-ray diffraction applied to assess cement hydration 

      de Matos, Paulo R.; Andrade Neto, José da Silva; Jansen, Daniel; Gomez-de-la-Torre, Maria de los Angeles; Kirchheim, Ana Paula; [et al.] (sciencedirect, 2022)
      In-situ X-ray diffraction (XRD) is a powerful tool to assess the hydration of cementitious materials, providing time-resolved quantitative analysis with reasonable accuracy without disturbing sample. However, the lack ...
    • The role of sodium and sulfate sources on the rheology and hydration of C3A polymorphs 

      Andrade Neto, José da Silva; Gomez-de-la-Torre, Maria de los Angeles; Campos, Carlos E. M.; Gleize, Philippe J. P.; Monteiro, Paulo J. M.; [et al.] (Elsevier, 2022)
      The higher reactivity of orthorhombic C3A (ort-C3A) in sulfate-containing solutions, compared with cubic C3A (cb-C3A), was previously related to the differences in crystal structure or the sodium in the ort-C3A pore solution. ...