Research on compressive strength of hybrid fiber reinforced concrete based on orthogonal design

The influence of steel fiber and polypropylene mixed on compressive strength high performance concrete (HPC) was studied. content (0.5%, 1.0%, 1.5%, 2.0%) (volume fraction, the same below), (0.05%, 0.1%, 0.15%, 0.2%) length (5mm, 6.5mm, 12mm, 18mm) were studied by L 16 (4 5 ) orthogonal test for 28d ages, range analysis variance results are carried out, prediction model hybrid reinforced established. show that: significant factor is volume fraction fiber, while not significant; with shows negative effect; has accuracy, average relative errors 2.96%.