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Testing the Resistance of Fresh SCC to Segregation


In-situ quality assessment of fresh concrete

 


This paper presents experimental results from an in-situ applicable method based on the J-ring test for testing the resistance of fresh SCC to segregation. This method was compared with the sieve stability test in the laboratory. Different mixes of fresh SCC with natural, blended natural and crushed, and crushed aggregates were used in the comparison tests. Concrete were cast in plastic pipes with 2 m height using some of representative mixes with crushed aggregates. Specimens from different heights were taken for testing compressive strength and chloride migration coefficient. The results show that there is a fairly good correlation in the measurement results between the two test methods for the SCC with natural aggregates, but not for that with crushed aggregates. The relationships between the fresh and hardened properties of SCC as well as some discrepancies between the two test methods in the test results are discussed.

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CPi worldwide journals are trade journals for the concrete and precast concrete industry that are published in 10 different language editions in more than 170 countries. These trade journals, with their practical editorial reporting on research, production and applications, are specifically addressing the decision makers of the concrete and precast concrete industry.

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