Aberthaw tests of concrete in sea water . Sample No. 17Proportions 1 Iron Ore Cement .! Siind () Stone 293 11). Water Cast wet, Janimry , 1900. Fwere removed Jannary 18,Speeinien immersed Fehruarv1909. When leveled off. showedstreaks in water on top. orms 1909. -2~, Length l(i ft. A\erage sec-tional area sq ft. ^olunle () cii ft. Net Volume ofConcrete Gross Wei>;ht 422.) 11). Net Weight ofConcrete (t Do. per en. ft. 14, (ondition March .5, 1!)1() -Apparently in as good condition aswhen placed. Condition December 17, 191.) .Ml four sides slightly eal<ii fromii

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Aberthaw tests of concrete in sea water . Sample No. 17Proportions 1 Iron Ore Cement .! Siind () Stone 293 11). Water Cast wet, Janimry , 1900. Fwere removed Jannary 18,Speeinien immersed Fehruarv1909. When leveled off. showedstreaks in water on top. orms 1909. -2~, Length l(i ft. A\erage sec-tional area sq ft. ^olunle () cii ft. Net Volume ofConcrete Gross Wei>;ht 422.) 11). Net Weight ofConcrete (t Do. per en. ft. 14, (ondition March .5, 1!)1() -Apparently in as good condition aswhen placed. Condition December 17, 191.) .Ml four sides slightly eal<ii fromiiigh tide to l)ottom. ^Iost of actionaroim<l low tide mark. Corners \11 eating action on mortar. unaffected. l)ee|)csl holes lessthan 4 inch. (ondilion June 0, Ifh^O—^» Badly pitterl on faces hetwcen highand low water, especially around lowwater. Coarse aggregate cxpos<d. ( on-crete solid. Deepest pits about 1 badly Sample Sample No. 17 1!)2() 1 ACTION O F SEA W A T E R O N C O N (^ R E T E Wl

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Keywords: ., bookcentury1900, bookdecade1920, booksubjectconcret, bookyear1920