Harm of Jarosite Alteration Zone to Hydraulic Structure and Its Handle
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摘要: 黄钾铁矾蚀变带,是黄铁矿风化(氧化)后的产物,他在风化(氧化)过程中产生大量的硫酸,酸性介质不仅对砼产生严重腐蚀,同时对水工金属结构同样具有较强的腐蚀性。发电洞竖井砼直接浇筑在黄铁矿脉上,60cm厚的钢筋砼仅半年时间被腐蚀穿,在国内外水工建筑物中尚属首例。Abstract: The Jarosite alteration zone is product of the weathering pyrite.During weathering,pyrite produce a lot of sulphonic acid,the acid can not only corrode concrete,but also corrode metal structure seriously.It only takes six months to break a reinforced concrete 60 cm thick,when biuld directly the concret of power hole shaft on the pyrite ore vein.It is first case in hydraulic structure in the world.
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Key words:
- Jarosite alteration zone /
- weathering /
- oxidation /
- hydrothermal alteration /
- pintadoite
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