Impact of KOH on the interfacial precipitation rates of C-S-H during the early hydration of C3S

• Published in: Cement and concrete research Vol. 146; p. 106488
• Main Authors: Wagner, Daniel, Bellmann, Frank, Neubauer, Jürgen
• Format: Journal Article
• Language: English
• Published: Elmsford Elsevier Ltd 01.08.2021; Elsevier BV
• Subjects: Acceleration; Alkalies; Alkalis (D); Alkalizing; Aluminum oxide; Ca3SiO5 (D); Calcium-Aluminium-Silicate-Hydrate (B); Calcium-Silicate-Hydrate (B); Chemical precipitation; Heat measurement; Heat transmission; Hydration; Hydration (A); Mountains; Hydration (A); Alkalis (D); Calcium-Silicate-Hydrate (B); Calcium-Aluminium-Silicate-Hydrate (B); Ca3SiO5 (D)

In this work we investigated the influence of alkalis on the hydration of two triclinic samples of C3S. One pure C3S and one Al-doped C3S (0.5 wt.‐% Al2O3). We added differently concentrated KOH solutions representing alkalis in the pore solution, which lead to an increase of the interfacial precipi...