Abstract
This research concerns the abrasion resistance of high workability concrete with various amounts of Supplementary Cementitious Materials (SCM). Various factors affect abrasion resistance, including the strength of concrete, water-binder ratio, amount of SCM, surface finishing, degree of aggregate exposure, and severity of the abrasive loading. An underwater abrasion test method, in which specimens are sectors of a circle, was newly proposed based on the modification from a typical method for simultaneous comparison of the abrasion resistance of concrete of differing mix proportions. Abraded concrete volumes were determined using a non-contact 3D measurement system. It was found that initial surface irregularities affect the development of ensuing erosion. Concrete containing more fly ash showed less abrasion erosion resistance at early age. Concrete mixed with blast-furnace slag showed higher abrasion resistance for approximately 20% replacement of cement, within the test range of 0∼60%. In addition, the abrasion resistance increases as the aggregate exposure ratio increases for concrete with fly ash.
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