臺灣臨海環境受鹽害鋼筋混凝土耐久性之本土化研究

DOMESTIC STUDY ON THE DURABILITY OF REINFORCED CONCRETE TO SALT DAMAGE IN TAIWAN COASTAL ENVIRONMENT

10.6652/JoCICHE.201905_31(3).0001

陳育聖(Yu-Sheng Chen)；詹穎雯(Yin-Wen Chan)；楊仲家(Chung-Chia Yang)

氯鹽 ； 氯離子 ； 耐久性 ； 擴散係數 ； air-borne chloride ； chloride ion ； durability ； diffusion coefficient

中國土木水利工程學刊

31卷3期（2019 / 05 / 01）

217 - 229

繁體中文

本文主要在探討鹽害環境下鋼筋混凝土之耐久性質，針對臺灣沿海地區之氯鹽環境進行調查，並藉由現地濱海既有老舊結構物之取樣，探討混凝土材料及環境參數之關聯性，試驗內容包含大氣中氯鹽之調查、現地混凝土氯離子滲入行為及氯離子擴散係數等，進而建立混凝土表面氯離子濃度與大氣中氯鹽量之關係，同時利用混凝土氯離子擴散係數試驗成果，進而提出本土化鹽害耐久性分析模式，將可得到各種配比在不同氯鹽環境下所需要之保護層厚度。本研究依據實際環境調查資料所提出之建議值，可初步訂定出各縣市鹽害分區之範圍，並給予較合適之保護層設計值，有助於工程師於沿海環境下設計出抗鹽害且符合經濟效益之構造物。

This study is main on the durability of reinforcement concrete structures in salt damage environment. It had been discussed the relationship between concrete materials and environmental parameters through the investigation of air borne chloride in the coastal region of Taiwan and the sampling of existed old structures in same areas. The tests included the investigation of air borne chloride in the atmosphere, the infiltration behavior of chloride ion in on-site concrete, the chloride diffusion coefficient, etc. Based on the test results, the correlation between the chloride content on concrete surface and air borne chloride had been established. Further, the domestic durability analysis model of salt damage was proposed depending on the test result of chloride diffusion coefficient. Then the required cover thickness in various conditions of concrete mixing proportion and air borne chloride environment could be estimated. The suggestions from this research based on actual environmental survey data can be used to initially define the distribution of salt injury in each county, and to provide adequate design thickness of covering for RC. The procedures and recommendations of this research can also helpfully assist the engineers on designs of chloride-resistant and economic costal structures.

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