ACCELERATED HIGH-SPEED WATER EROSION TEST FOR CONCRETE WEAR DEBRIS ANALYSIS

This paper contains investigations of wear particles generated during the erosive wear of four different concrete mixtures by high velocity waterflow at velocities of about 700 m/s. The wear particles were coll ected, dried and analyzed by sieve experiments. Based on the sieve ana lysis, specific surface and average grain diameter of the particle sam ples were estimated. Using simple comminution relations, the specific crack length of every sample is calculated. It is shown that tall esti mated parameters exhibit a strong relationship to characteristic mater ial properties, such as compressive strength, Young's modulus, and abs orbed fracture energy. It was found by regression analysis that the av erage debris wear size can be effectively characterized by the absorbe d fracture energy of the concrete sample. It is concluded that these r elations are the result of different paths of fracture propagation thr ough the materials during the generation of a microcrack network.