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[Joan Tang]

Conclusion

Water-reducing agents are chemical compounds added to concrete mixtures to enhance workability without increasing the water-to-cement ratio. By optimizing this ratio, concrete can achieve improved strength and durability. The primary function of these agents is to facilitate easy mixing and placement, which is essential in complex construction projects. When the water content is reduced, the hardened concrete also exhibits better compressive strength, making it suitable for various structural applications.

Conclusion

HPMC is produced by the etherification of cellulose with propylene oxide and methyl chloride. The degree of substitution varies, leading to different molecular weights and rheological properties. On the other hand, HEC is synthesized by reacting cellulose with ethylene oxide, resulting in an ether that provides unique solubility and viscosity characteristics.