ABSTRACT
Stabilization with cement is an effective way to increase the stiffness of base and subbase layers and to improve the rutting of subgrade. Another way to improve the soil properties is to use fiber-reinforcement. The aim of the study is to investigate the effect of various percentages of cement additives: 1.5 and 3.0% and polypropylene fibers of various percentages: 0-0.3% on the compaction of post-glacial non-cohesive soil. The influence of the compaction method, the standard Proctor and the modified, was also analyzed. Problems with sample preparation were described too. The increase in the fiber and cement content resulted in an increase in the maximum dry density and a reduction in the optimum water content. The method of mixing the samples with fibers can have a significant effect on compaction parameters causing the maximum value of dry density to be underestimated.
