STUDY ON SEGREGATION RESISTANCE OF HIGH STRENGTH CONCRETE WITH ELECTRIC ARC FURNACE OXIDIZING SLAG FINE AGGREGATE

Segregation resistance tests were conducted on concrete with electric arc furnace oxidizing slag fine aggregate (ES) or normal fine aggregate (NS) and, segregation index was evaluated. In addition, a method of estimating segregation index was investigated based on mix proportion and flesh test. As a result, coarse aggregate is floated in concrete with ES, and coarse aggregate is settled in concrete with NS due to the difference of density between mortar and coarse aggregate. Furthermore, the possibility estimating segregation index is shown based on density difference between mortar and coarse aggregate and arrival time of 200mm flow of mortar.