Abstract
Magnesium Oxychloride Cement (MOC), also called Sorel cement, is a non-hydraulic cement first developed in 1867. This type of cement was formed based on the acid-base reaction between caustic magnesia and concentrated magnesium chloride solutions. Since its invention, MOC has been used as flooring and stucco material, artificial ivory, oil well sealant and in many other applications due to its aesthetics and unique characteristics such as high early strength, high elasticity and low alkalinity compared to OPC. This chapter thoroughly examined the phase composition, reaction mechanisms and microstructural characteristics of MOC. The optimal mix compositions and the influencing factors on the numerous engineering properties of MOC were critically reviewed. Moreover, attentions were drawn on the durability of MOC, in particular its water resistance and a wide range of measures to evaluate and improve it. Finally a detailed summary on the applications of MOC is provided together with promising cost-effective measures to produce MOC with sustainable resources and processes, shedding light on the future research directions and potential applications of this type of magnesia cement.
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