Research on decreased activity of low-magnesium oxychloride cement

The article discusses the main reasons for the decreased activity of magnesium oxychloride cements (MOCs) with low magnesium oxide content and the influence of this process on the physical and mechanical properties of composites obtained on the basis of such cements. The influence of long-term storage on the mineralogical composition of the magnesium oxychloride cement and the strength characteristics of the artificial stone obtained on its basis are investigated. A decrease in the strength characteristics of the stone based on MOCs with a low content of magnesium oxide during their long-term storage in an unsealed container has been revealed. A comparison between the mineralogical composition of magnesium cement stored for a long time in a package that does not restrict air access and magnesium cement made a day before testing is made. The lack of the influence of long-term storage of MOC on the susceptibility to cracking of the artificial stone obtained on its basis has been revealed.