HOW CEMENT PROTECTS IRON.
The protective power of Portland cement over iron and steel imbedded in it is generally regarded by engineers as fully established, and the last doubt (a writer in ‘'Engineering” thinks) should be removed by the results of experiments recently announced at Providence, Kl.ode Island b.S.A.
Clean, bright sheet iron was' imbedded in a hollow concrete cylinder with walls Sin. thick. The cylinder was then filled with water. At first a little water percolated through, but at the end of two months the concrete became perfectly water-tight At the end of two years the embedded iron was broken out, and found to he as dean, bright, and free from rust as when it was put. into the concrete. Similar results were obtained with iron and steel plates embedded in concrete Him thick and alternately wetted and dried for a period of two years.
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https://paperspast.natlib.govt.nz/newspapers/PGAMA19070329.2.53
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Pelorus Guardian and Miners' Advocate., Volume 8, Issue 26, 29 March 1907, Page 7
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146HOW CEMENT PROTECTS IRON. Pelorus Guardian and Miners' Advocate., Volume 8, Issue 26, 29 March 1907, Page 7
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