Comparison of Cement Grouts Mixed by High-Speed and Low-Speed Grout Mixers

摘要

A series of tests was performed to compare the physical properties of cement grouts mixed by a low-speed paddle mixer with those of grouts mixed by a high-speed centrifugal mixer. Grouts with water-cement ratios of 0.8:1, 1:1, 3:1, 5:1, and 8:1 by volume were tested and compared. Test results indicated that the difference in the mixer did not significantly affect compressive strength, but the grouts prepared with the high-speed mixer exhibited less bleeding, more water retentivity, and less shrinkage.