Influence of cellulose ethers on rheological properties of cementitious materials: A review

Abstract

Cementitious materials (CM) with high fluidity, high stability, and high cohesiveness are the requirements of modern engineering construction. As a prevalent chemical admixture in CM, cellulose ether (CE) effectively enhances the fluidity and workability of CM, playing an important role in modulating the rheological properties of fresh CM. This paper presents a comprehensive review of recent advancements in regulating and enhancing of rheological properties of cement-based materials through CE. Moreover, the paper primarily focuses on elucidating the effects of different types of CE on the rheological parameters of CM and the underlying mechanisms influencing rheological properties. These mechanisms include the influence of CE substituent groups on water molecules, the formation of a reticulated film in water by CE affecting cement particle interactions, the air-entraining effect, and the effect of the hydration process. Furthermore, the factors influencing the rheological properties of CE-modified CM are explored, including CE interaction with other admixtures, and external environmental factors like temperature, humidity, wind presence, CE dosage, and reaction time. Finally, the engineering application of CE in cement-based materials is surveyed, while future research directions for CE in such materials are outlined. This review offers a theoretical foundation and practical insights for further enhancing the rheological properties of CE-modified CM.