非破壞檢測應用在預拌土壤材料品質檢測之研究

Quality Inspection for Ready Mixed Soil Materials by Nondestructive Testing

沈永年(Yeong-Nain Sheen) ； 陳郁仁(Yu-Ren Chen) ； 鄭力豪(Li-Hao Cheng)

《臺灣鑛業》 63卷3期 (2011/09) Pp. 31-38

https://doi.org/10.30014/TMI.201109.0004

摘要

預拌土壤材料（RMSM）是一種介於控制性低強度材料（CLSM）與土壤水泥間（Soil Cement）之新型回填材料。本研究係以高屏溪流域因莫拉克颱風造成八八風災所沖刷之河川為研究材料，分別以高屏堰及里嶺大橋上游之河川淤砂進行相關配比試驗，再利用超音波速與反彈錘法作為RMSM現地強度檢測方法，探討此兩種檢測方法之適用性及期望能解決臺灣自然砂石資源短缺與廢棄土方問題。研究中使用十二組添加河川淤砂與資源回收土之配比，水灰比1.5、1.7、1.9，配比設計強度為28天齡期抗壓強度不超過50 kgf/cm^2，試驗齡期為1、7、28、56天，每個齡期於圓柱試體與版試體上進行超音波速與反彈錘試驗，建立出RMSM非破壞檢測與抗壓強度之關係方程式。結果顯示，RMSM新拌性質方面十二組配比皆可滿足高流動性要求。水灰比1.5之RMSM抗壓強度成長幅度大於水灰比1.7、1.9者；里嶺大橋段（L）河川淤砂配比之強度高於高屏堰段（H）淤砂配比之強度。利用超音波速、反彈錘數與抗壓強度所建立之非破壞檢測關係式，具有良好相關性，抗壓強度推算誤差值分別小於10%與14%。

關鍵字

預拌土壤材料 ； 控制性低強度材料 ； 非破壞檢測

並列摘要

Ready-mixed soil materials (RMSM) is a new type of controlled low strength materials (CLSM) with engineering properties between CLSM and soil cement. The objective of this study is to establish the relationship between the physical quantities measured by the nondestructive techiques and the compressive strength of RMSM. The specimens used in the studies were made of silt from Kao-Ping River sediment by Typhoon Morakot. The water to cement ratio (W/C) are 1.5, 1.7 and 1.9. The design 28 days strength must be less 50 kgf/cm^2. The results show that the workability of RMSM can satisfy the needs of requirements. The model established by nondestructive techiques using ultrasonic pulse velocity, rebound hammer count and compressive strength, has high degree of relevancy. The compressive strength of RMSM can be predicted by the ultrasonic pulse velocity and rebound hammer with errors of less than 10% and 14% respectively.

並列關鍵字

ready-mixed soil materials ； controlled low strength materials ； nondestructive test