Mixing and surface modification of raw materials for poly-vinyl-alcohol (Vinylon) fibers-reinforced cement-based building materials using a high-velocity pneumatic double-stage impactor

摘要

Raw powder, such as ordinary portland cement, admixture, fine aggregate, dispersant, thickener and vinylon fibers for building materials, was treated by different mixing methods with a high-velocity pneumatic double-stage impactor. The process of becoming globular has been practically applied to building materials to investigate the effects on the basic physical proper- ties including pore size distribution, specific surface area, minimum water/cement ratio and plasticity, of the treated composite powder due to modification, so as improve the frost resist- ance and the strength of the building materials.