The effect of one-part magnesium oxychloride cement additive on the mechanical, mineralogical, water resistant and micro structural properties of dolomite cement

In this paper magnesium oxychloride cement (MOC) is prepared from dolomite by calcinations process. The effect of different ratios of additive prepared from magnesite MOC (0.5, 1 and 1.5%) on the mechanical properties of dolomite MOC is recorded at 7, 14 and 28 days. Infrared spectroscopy (IR-spectra) is used to characterize the effect of magnesite MOC additive on the mineralogy of dolomite MOC mixes air cured at 28 days. The results indicated that one-part MOC additive posted the mechanical compressive strength of dolomite MOC mix at addition rate of 0.5 and 1% and was declined at 1.5%. The water resistance of MOC increased with increase of additive in mix. The micro structural investigation revealed that the mechanical performance of MOC was predominantly dependent on abundance and crystals size of phase 5.