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A Study on Corrosion Resistance of Prestressed Marine Concrete Piles

机译：预应力船用混凝土桩抗腐蚀性能研究

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This study addresses the resistance to chloride ion penetration in the prestressed concrete largediameter cylinder piles exposed to the severe marine splash/tidal zone. Time to initiation of corrosionwas predicted by using the Fick's 2 'd law for chloride penetration. The effects of water to binder ratio(w/b), mineral admixtures, and cover thickness were evaluated by the comparative studies, based onone-dimensional direct calculation, two-dimensional analysis using a computer software application, andcase studies. The influences of environmental characteristics, manufacturing process, and localexperiences were taken into account. The findings include I) tile remarkable durability enhancement forthe utilization of low w/b high strength concrete mixture, compared with the increase of cover thickness,ii) the ineffectiveness of fly ash inclusion; and iii) the importance of selection of manufacturing process,structural design, and construction procedure.
机译：这项研究解决了暴露于严重海洋飞溅/潮汐带的预应力混凝土大直径圆柱桩中对氯离子渗透的抵抗力。通过使用Fick的2'd氯化物渗透定律可以预测腐蚀开始的时间。通过一维直接计算，使用计算机软件的二维分析和案例研究，通过比较研究评估了水与粘合剂之比（w / b），矿物掺合料和覆盖层厚度的影响。考虑了环境特征，制造过程和当地经验的影响。研究结果包括：I）与增加覆盖层厚度相比，使用低w / b高强度混凝土混合物可显着提高耐久性，ii）粉煤灰夹杂物无效。 iii）选择制造工艺，结构设计和施工程序的重要性。

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