In the alternation of wetting - dry sulfate corrosion environment, the Portland cement concrete is not suitably used.

在干湿交替的硫酸盐侵蚀环境中, 不宜采用普通水泥混凝土.

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During the nineteenth century , 20, made of Portland cement, concrete has come out.

十九世纪20年代, 波特兰水泥制成后, 混凝土问世了.

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Portland cement concrete shall be, and sulfate resistant cement; steel structure is painted with protection coat.

混凝土采用普通硅酸盐混凝土, 施用抗硫酸盐水泥; 钢布局粉刷防护涂层.

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