AIR-PROOF CEMENT.--C. Pascher finds that the only substance which is really efficacious for rendering cements unalterable by the air, is a cold solution ...
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https://www.riss.kr/link?id=O127020947
1883년
eng
학술저널
PHP / Trade Journals / Feature
191 [※수록면이 p5 이하이면, Review, Columns, Editor's Note, Abstract 등일 경우가 있습니다.]
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
AIR-PROOF CEMENT.--C. Pascher finds that the only substance which is really efficacious for rendering cements unalterable by the air, is a cold solution ...
AIR-PROOF CEMENT.--C. Pascher finds that the only substance which is really efficacious for rendering cements unalterable by the air, is a cold solution of one part of sulphate of iron in three parts of water. The cement articles are left in the solution for twenty-four hours; at the end of this time they take a greenish-black tint, due to the hydrated protoxide of iron. The absorbed solution is decomposed in the interior of the cement; the weight of the cement is increased ten per cent; all the pores of the mass are thus stopped by the hydrate, and as this combination is not attacked by the air, the cement itself becomes unalterable.