| Summary: | 碩士 === 國立臺灣海洋大學 === 河海工程學系 === 102 === In this study, the engineering properties for aggregates from Minjiang River (Fujian) were investigated to check whether they can be used for making concrete. The physical and chemical properties were examined in the laboratory, and the results were compared with those obtained from aggregates in Nanao south rivers and Nanao north river [1]. The evaluations were made according to CNS 1240, CNS 6299 and engineering practices.
The results show the specific for the aggregates from Matsu was lower than normal aggregates and the performance of the water absorption percentage was low. For the grade of aggregates, all groups (Matsu, Nanao south river and Nanao north river) matched the requirements in the specifications, which indicated that the Matsu aggregates did not have the poor grading phenomenon. The chloride ion content in Matsu aggregates was far below the requirement, it implied that no corrosion concern needed to be taken care. When the specific weight for the coarse aggregate was higher, the water absorption percentage became lower due to a denser structure. The abrasive percentage for Matsu aggregates (also for Nanao south and north rivers) matched the CNS requirement, Matsu aggregates could be used for high strength concrete. The concrete made by Matsu aggregates and Nanao south river aggregates showed higher durability than that made by the Nanao north river aggregates by the results from soundness test.
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