增進混凝土結構免腐蝕耐久性之全球設計

A Global Design/Management Strategy to Enhance Corrosion-Free Durable Service Life of Concrete Constructions

鋼筋腐蝕已被公認為影響混凝土結構的材料穩定性及結構完整性的主要因素。在嚴苛的侵蝕性環境下，因鋼筋腐蝕所引起的材料劣化與結構損害，會降低結構壽命，影響其強度、穩定度與安全性，而且導致提前毀壞。本論文旬在提供一整合性之方法，即全球設計／管理策略，來設計經久耐用之新結構，並增進現在正劣化中的結構物之壽命。對於新建或因環境侵害正劣化中的混凝土結構，本文均明列各項設計參數及應採用之策略，以確保其免於腐蝕。相關測試數據亦一併提出佐證。

Corrosion of steel reinforcement is now universally recognised as the major factor affecting the material stability and structural integrity of concrete structures. In very aggressive environments, the material degradation and structural distress arising from steel corrosion can dramatically reduce the useful service life of structures, affect their strength, stability and safety, and indeed, even lead to premature failure. The aim of this paper is to offer an integrated, holistic approach — a global design/management strategy — which will enable us to design new structures with a specified durable service life, and which will also enable us to enhance the durable service life of existing deteriorating structures. The paper identifies the design parameters that need to be satisfied and the strategy that needs to be adopted to ensure long term corrosion — free service life of concrete structures, whether they are to be newly built or are existing but deteriorating due to environmental attack or otherwise damaged. The paper is accompanied by relevant and appropriate test data.