通过对高水速凝材料硬化体物相结构和微观形貌分析，揭示了其主要物相构成。由于其组成主要是细长纤维状的钙矾石晶体，且孔隙中填充有大量自由水，从而使硬化体总含水质量比达７０％以上，成为高水速凝材料的最主要特点，且不易粉化，适宜于井下充填。 Through the analysis of phase structure and microstructure of hardened solidified material with high water velocity, the main phase composition of the material was revealed. Because of its composition is mainly slender fibrous ettringite crystals, and the pores filled with a large number of free water, so that the total water content of hardened body than 70%, as the most important feature of high-water-setting materials, and not easy Chalking, suitable for downhole filling.