混凝土結構體鋼筋腐蝕抑制材料之研究

本研究針對當前混凝土材料因滲漏水而產生之白華現象進行相關水泥砂漿配方試驗。以實驗方式測試9組共27顆水泥砂漿試體在具有鋼筋腐蝕電位之濕置環境下抵抗氫氧化鈣析出的能力，分析腐蝕電位對於白華現象的影響程度。實驗控制參數包括(1)試體製作採用之拌合水特性，(2)水泥摻料，(3)鋼筋塗佈效果。研究結果顯示，(1)採用離子水製作試體及浸泡時，可以有效降低鋼筋的腐蝕電位；(2)採用離子水拌合製作，並以XC材料塗佈於鋼筋表面，浸泡於離子水中之試體腐蝕電位最低。(3)浸泡自來水之試體，其水線以下週遭及底部表面均有白色沉澱物析出，但浸泡離子水之試體則無此現象，證實離子水確實具有防止白華的功效。

關鍵字

滲漏水；白華；鋼筋；腐蝕電位；離子水

並列摘要

In this study, the problem of Concrete Leakage causing the “Efflorescence”. The related testing to improve cement mortar formulations. There are 9 groups of 27 samples of cement with deformed bar mortar were setting in the wet environment (with electrical potential observed), these testing exam the degree of various admixture resist corrosion ability, which is solubilized of calcium hydroxide. Analysis on the corrosion potential impact for the efflorescence phenomenon. Experimental features of control parameters include: (1) Mixing Water of make Specimen, (2) Cement Admixture, (3) Coating Material on deformed bar. This research results showing that (1)while test specimen mixing with and soak in ionized water, can effectively reduce the corrosion potential of deformed bar; (2) Test specimen mixing with and soak in ionized water, and also coating deformed bar with XC, these specimens obtain minimum corrosion potential. (3) Test specimen immersion in drinking water, under the waterline and the bottom of container where we could find white sediment/precipitate. But test specimen soaking in ion water does not have this phenomenon. Above conclusions stated that ionized water does prevent the effect of deformed bar corrosion, i.e. “Efflorescence”