经过多年的侵蚀，水泥石化了。
试验结果表明，粉煤灰等量取代部分水泥，可以有效解决蒸汽养护混凝土抗氯离子侵蚀能力不够的问题。
Results indicated that fly-ash substituting same amount of cement can effectively solve the problem of insufficient anti-chloride-corrosion ability of steam cured concrete.
混凝土的侵蚀实质是水泥石的侵蚀，而造成混凝土宏观破坏。
The corrosion essence of the concrete is that corrosive materials attack its hardened cement paste and thus destroy the concrete as a whole.
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