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| 題 名 | 公東教堂在修復前的非破壞性檢測與混凝土材料破壞原因探討=Non-Destructive Testing of Gongdong Chapel and Investigation on the Causes of Concrete Material Deterioration before Restoration |
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| 作 者 | 顧超光; | 書刊名 | 科際整合月刊 |
| 卷 期 | 11:1 2026.01[民115.01] |
| 頁 次 | 頁19-46 |
| 分類號 | 440.12 |
| 關鍵詞 | 公東教堂; 非破壞性檢測; 混凝土抗壓強度; 氯離子含量; 混凝土中性化; Gongdong Chapel; Non-destructive testing; Concrete compressive strength; Chloride ion content; Concrete carbonation; |
| 語 文 | 中文(Chinese) |
| 中文摘要 | 公東教堂早年施工時以低成本、克難的方式,於民國 49 年興建完成。結構 採用鋼筋混凝土版牆系統,由於使用海砂,導致混凝土中氯離子含量偏高。數 十年前的破壞性材料檢測結果顯示,多數混凝土中的氯離子含量超出國家標準 參考值,高氯離子含量誘發鋼筋鏽蝕;混凝土中性化現象普遍且嚴重,尤其三 樓和四樓中性化深度最高超過鋼筋保護層厚度,造成鋼筋鏽蝕;此外,混凝土 品質控管不佳,抗壓強度值差異性極大。這些因素共同作用下,導致修復前結 構體出現保護層剝落、柱頭爆裂及鋼筋外露等損壞情形。 過去檢測多以鑽心取樣進行,雖能獲得抗壓強度、中性化深度與氯離子含 量等數據,但是容易留下清水混凝土表面疤痕,影響美感。本次檢測為了避免 混凝土表面的損傷,採用非破壞性的混凝土強度試錘,全面性地評估結構各部 位的強度。最終的檢測數據和早期破壞性測試結果相符,皆表明教堂低樓層的 混凝土材料強度較高,而高樓層則普遍強度不足且劣化情況更為嚴重。非破壞 性檢測的優點是易於操作,且能對結構體進行全面性施測而不造成破壞。綜合 分析顯示:公東教堂混凝土劣化原因主要為海砂使用與中性化影響,非破壞性 檢測提供更完整且友善的保存依據,對後續修復與歷史建築保存具重要參考價 值。 |
| 英文摘要 | Gongdong(St. Joseph Technical Senior High School) Chapel was constructed in 1960 with low-cost and makeshift methods. The structure adopted a reinforced concrete slab-wall system, but the use of sea sand resulted in a high chloride ion content in the concrete. Destructive material testing conducted decades ago revealed that most concrete samples contained chloride ion levels exceeding national reference standards. Elevated chloride content induced reinforcement corrosion; carbonation of the concrete was widespread and severe, especially on the third and fourth floors, where carbonation depth exceeded the thickness of the protective layer, leading to reinforcement corrosion. In addition, poor quality control during construction caused significant variation in compressive strength. These factors collectively led to damage prior to restoration, including spalling of the protective layer, cracking of column heads, and exposed reinforcement. Earlier testing relied on concrete core drilling and sampling, which provided data on compressive strength, carbonation depth, and chloride ion content, but left scars on the fair-faced concrete surface, affecting aesthetics. To avoid surface damage, the investigation employed non-destructive rebound hammer testing to comprehensively evaluate the strength of different structural components. The results were consistent with earlier destructive tests, showing that the lower floors had higher concrete strength, while the upper floors generally exhibited insufficient strength and more severe deterioration. The advantages of non-destructive testing include ease of operation and the ability to assess the entire structure without causing damage. Comprehensive analysis indicates that the primary causes of deterioration in Gongdong Chapel’s concrete were the use of sea sand and carbonation. Non-destructive testing provides a more complete and preservation-friendly basis, offering important reference value for subsequent restoration and conservation of historic architecture. |
本系統中英文摘要資訊取自各篇刊載內容。