ABSTRACT
Recently, researchers have studied the preparation and properties of self-leveling mortar in China. Gu Jun (2008) studied polycarboxylate superplasticizer-modified self-leveling cement and pointed out that the polycarboxylate was suited for self-leveling cement mortar and is highly costeffective. However, polycarboxylate superplasticizer may change air entraining performance slightly, so bubble problem should be attended. Wu Jie and Guo Qiang found that the complex retarder can make up for the deficiency of a single retarder, which has the advantages of each retarder and improves the comprehensive performance of the retarder. Hassan et al. used POFA and PBC in self-leveling cement mortar; POFA and PBC can prevent the separation of the mortar with a high-efficiency water-reducing agent. The paper by Canbaz M described that the setting time of cement increased with the increase of the additive. In Self-Compacting Mortar (SCM), Gneyisi et al. used fly ash instead of natural fine aggregate, in which the work of self-leveling mortar was improved effectively.
