Research on reasonable cement slurry consistency of cement stabilized crushed stone permeable base

The former researches have shown that the permeable base materials should have sufficient void and high strength. But they are always controversial. Only when the cement slurry consistency is reasonable, equal void and high strength is possible. However, in the material design, slurry design is not paid enough attention to comparing with gradation. There is not an effective experimental method to determine the reasonable slurry consistency either. A new experiment with drainage weight as evaluation index is designed to evaluate reasonable cement slurry consistency. After studying the relation between drainage weight and time, standard drainage time is determined as 60s. By building the relations among drainage weight, 7d strength, and void diversity between up and down part, the criterion of drainage weight is less than 150g. Finally, following the method, 4 gradations are chosen to verify the strength, the cleavage strength, resilient modulus, and shrinkage. The results present that the materials designed by this method have good mechanic performance.