TY - JOUR A1 - Stroh, Julia A1 - Meng, Birgit A1 - Emmerling, Franziska T1 - Monitoring of sulphate attack on hardened cement paste studied by synchrotron XRD JF - Solid state sciences N2 - The complex matter of external sulphate attack on cement-based construction materials is still not completely understood. The concentration of sulphate is a crucial factor for the formation of secondary phases and phase transitions of cement hydrates due to sulphate ingress into the microstructure. The sulphate attack on building materials for high and low sulphate concentrations was monitored by laboratory experiments. Hardened cement paste consisting of ordinary Portland cement (CEM I) were exposed to aqueous solutions of sodium sulphate for 18 months. Three sample compositions were used for this research, including different supplementary cementitious materials (SCM). The phase composition was determined for different time spans by high resolution synchrotron X-ray diffraction. Cross sections of exposed cement prisms were investigated as a representation of the microstructural profile. Based on the data, a temporal and spatial determination of the stages of the sulphate attack and the deterioration course was possible. Cement matrices blended with slag showed the highest resistance against sulphate attack. KW - Cement paste KW - Sulphate attack KW - Mineral additions KW - Concentration KW - Monitoring PY - 2015 DO - https://doi.org/10.1016/j.solidstatesciences.2015.08.006 SN - 1293-2558 SN - 1873-3085 VL - 48 SP - 278 EP - 285 PB - Elsevier Masson SAS CY - Amsterdam AN - OPUS4-34281 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -