| Summary: | 碩士 === 國立中興大學 === 土木工程學系所 === 107 === For effective and proper use of the limited river aggregate resources, the study investigate the aggregate properties of Yanshuei River, Jishuei River, Beigang River and Pachang River basin. The test results of aggregate properties are based on specifications of different aggregates, including the project appraisal of the specific gravity of coarse aggregate. The quality of aggregate is divided into three levels. Aggregates with the first grade quality are hardest and applicable to high strength concrete or special constrution; aggregates with the second grade quality are applicable to asphalt concrete and common concrete; aggregates with the third grade quality have low strength, used as backfill materials or agriculture use.
There are many soil sands in the Yanshuei and Jishuei River stream system, belong to grade third level; There is no coarse aggregate in the mainstream of the Beigang River, which is grade third level. The upstream tributaries of Dapu River, Dahukou River, Shiniou River, and Shiliuban River have an average abrasion rate on 16%, and the coarse aggregates are hard, which is the first level; There are many sands after the Zhongyi Bridge of Pachang River, and the rivers are filled with alluvial soil on both sides of the river, which belongs to grade third level. There is little aggregate in the upstream section, but the abrasion rate is 31% on average, belongs to the second level, which the coarse aggregate can be applied to ready-mixed concrete and asphalt concrete.
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