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Proposal on the Evaluation Method of Segregation Resistance of Normal Strength Concrete
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 Title & Authors
Proposal on the Evaluation Method of Segregation Resistance of Normal Strength Concrete
Han, Cheon-Goo; Han, In-Deok;
Since the currently used segregation evaluation method is quantitative method based on the experience of operator, it has had many difficulties to adopt for practice. In this research, as a solution of this problem, new workability performance evaluation method was suggested using the performance levels based on the evaluation index of segregation for normal concrete (EISN) quantified by the maximum-to-minimum ratio of the flow of slumped concrete by the slump test. As the results of the experiment, when the range of the slump value was 150 to 230 mm, (slump flow value was 300 to 450 mm)the evaluation method was valid. Namely, as a base of 1.09 EISN, lower and higher ranges were determined as a "good" and "segregation", respectively, and further performance leveling was suggested with 1.06 - 1.09 for III level, 1.03 - 1.06 for II level, and 1.00 - 1.03 for I level within the "good" range. Within the good conditions of concrete, the categorized performance levels were suggested with level I, II, and III for 1.00 - 1.03, 1.03 - 1.06, and 1.06 - 1.09, respectively.
Normal Strength Concrete;Resistance of Segregation;Slump;Slump Flow;Eveluation Index for Segregation;
 Cited by
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