Mixing homogeneity of cement-stabilized macadam and its influence mechanism on road performance

Abstract

To study the effects of different mixing processes on the mixing uniformity of cement-stabilized macadam, three mixing processes, namely, ordinary static mixing, vibratory mixing and vibratory machine off-vibration mixing, are compared and studied by visual identification, coarse aggregate distribution statistics in core sample section, mixture sieving and cement dosage titration. The results show that the cement slurry produced by the vibratory mixing process has the best adhesion effect on coarse aggregate, and its variability in the number of coarse aggregate distribution in the core sample section, the key sieve passing rate of the aggregate and variability of cement dosage titration are the lowest. In conclusion, vibratory mixing can improve the homogeneity of cement-stabilized macadam, thus improve internal friction resistance and cohesion of the mixture, and enhance the road performance.