Baran Edyta, Hynowski Mariusz, Kotwica Łukasz, Rogowski Jacek
Research and Development Center, Branch Leszcze, Atlas sp. z o.o., Leszcze 15, 28-400 Pińczów, Poland.
Department of Building Materials Technology, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, al. Adama Mickiewicza 30, 30-059 Kraków, Poland.
Materials (Basel). 2023 Jul 18;16(14):5058. doi: 10.3390/ma16145058.
The introduction of the European Union's climate change legislation and the intended use of renewable energy sources instead of fossil fuels will significantly reduce the production of flue gas desulfurization (FGD) gypsum used as the raw material for gypsum mortar plasters' production. This has forced mortar producers to look for alternative materials, including gypsum-cement composites. This work investigated the mechanical strength and linear extension of four gypsum-cement mortars with the gypsum content reduced to 30%. The authors showed that the cement admixture of 6 to 12% introduced into the prepared mortars resulted in the formation of gypsum-cement mortars, which fulfill the requirements of the EN 13279-1:2008 standard concerning mechanical strength. This publication took into account the use of scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffractometry to characterize the chemical and phase composition of the mortars up to 180 days of dry air curing and increased relative humidity (RH) conditions. The formation of thaumasite, ettringite, and mixed ettringite-thaumasite phases was interesting because of their deleterious effect on the durability of plaster mortars.
欧盟气候变化立法的出台以及用可再生能源替代化石燃料的计划，将大幅减少用作石膏砂浆生产原料的烟气脱硫（FGD）石膏的产量。这迫使砂浆生产商寻找替代材料，包括石膏 - 水泥复合材料。这项工作研究了四种石膏含量降至30%的石膏 - 水泥砂浆的机械强度和线性延伸率。作者表明，在制备的砂浆中引入6%至12%的水泥外加剂，可形成符合EN 13279 - 1:2008标准机械强度要求的石膏 - 水泥砂浆。本出版物考虑使用扫描电子显微镜（SEM）、能量色散X射线光谱（EDS）和X射线衍射法，对在干燥空气养护和相对湿度（RH）增加条件下长达180天的砂浆的化学和相组成进行表征。由于碳硫硅钙石、钙矾石以及钙矾石 - 碳硫硅钙石混合相的形成对抹灰砂浆的耐久性有有害影响，因此它们的形成很有趣。
