Cracking of Concrete in Sea Water Due to Embedded Metal Corrosion
Cracking of Concrete in Sea Water Due to Embedded Metal Corrosion
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DOI：
10.5006/0010-9312-35.7.309
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发表时间：
1979-07
期刊：
影响因子：
1.6
通讯作者：
W. Grimes;W. Hartt;D. H. Turner
中科院分区：
文献类型：
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作者：
W. Grimes;W. Hartt;D. H. Turner
摘要 通过在嵌入金属上施加阳极直流电并监测开裂时间，研究了海水中混凝土开裂现象。采用了各种嵌入金属，这些金属按照混凝土开裂时间增加的顺序排列为镉→锌和铜→镍和钢→钼。进行了额外的补充实验来考虑外加电流样本金属-混凝土界面附近孔隙水的化学性质。这些涉及用各种金属氯化物逐步滴定混凝土饱和蒸馏水溶液，并确定氯离子浓度在 0.05 gms/mL 范围内可导致 pH 值转变为酸性范围。此类滴定实验的 pH 值测定结果与外加电流测试中使用的混凝土样本断裂面的 pH 值测量结果大体一致。实验结果在现有理论框架内进行了讨论...
Abstract The phenomenon of concrete cracking in sea water has been investigated by impressing an anodic direct current upon the embedded metal and monitoring time to cracking. Various embedded metals were employed, and these ranked in order of increasing concrete cracking time as cadmium → zinc and copper → nickel and steel → molybdenum. Additional complementary experiments were conducted to consider the chemistry of the pore water in the vicinity of the metal-concrete interface of the impressed current specimens. These involved step-wise titration of a concrete saturated distilled water solution with various metal chlorides, and it was determined that chloride ion concentrations in the range 0.05 gms/mL can cause a pH shift to the acid range. The pH determinations from such titration experiments are in general agreement with pH measurements upon fractured faces of the concrete specimens employed in the impressed current tests. The experimental results are discussed within the frame of present theories fo...