海砂屋調查及分析

Analysis and Investigation of Sea Sand Buildings

本文係針對海砂屋之劣化現象並利用紅外線影像系統（TVS）與熱分析技術的熱失重分析法，以偵斷鋼筋混凝土劣化現象，並探討該技術之實用性。應用熱分析技術之熱失重分析法可偵測出混凝土在施工中摻加海砂或在使用期間有腐蝕因子侵入，使用的試料少且快速可靠。而使用TVS則可即刻及可靠的偵斷RC結構物的內部有無龜裂剝離現象出現。尤其對高層大樓的建材劣化調查特別實用，此兩種方法操作相當簡便，對於海砂屋之健康診斷相當可行。本文亦指出為確保建築物之耐久性，除施工時應注意施工材料之品質控制外，平時並需定期作建築物健康檢查。本文之重要性在闡述海砂屋之病變現象之嚴重性及評估以熱分析偵測及紅外線影像系統技術之可行性。

The purpose of this paper is to describe the deteriorated appearance of sea sand buildings, the technology of thermal video system (TVS) and thermogravimetric analysis (TGA) for monitoring the deteriorated phenomena of reinforced concrete, and also to evaluate their practical usage. The application of TGA can detect the presence of sea sand during mix proportioning or any corrosion agants attack on the structures during operation. The test materials only need small quantity, and the test speed is quick and reliable. The technique of TVS can monitor the existing cracks inside concrete structures. It is fast, reliable and practical, especially to high-rise buildings. The operation of this two nondestructive methods are so simple that they are very practical methods for durability check. It also points out in this paper that, for insuring the performance safety of buildings, regular durability check is necessary besides the quality control of construction material during costruction. The importance of this paper is to describe the severe deteriorating phenomena of sea sand buildings and to evaluate the feasibility of the usage of TGA and TVS techniques.