File:A practical treatise on natural and artificial concrete; its varieties and constructive adaptations (1879) (14577245819).jpg

Identifier: practicaltreatis00reid (find matches)
Title: A practical treatise on natural and artificial concrete; its varieties and constructive adaptations
Year: 1879 (1870s)
Authors: Reid, Henry
Subjects: Concrete
Publisher: London, New York, E.& F.N. Spon
Contributing Library: Getty Research Institute
Digitizing Sponsor: Getty Research Institute

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e English type, 80 feet high, on the open intermittentsystem,and of unusually large size; so much so, indeed, asto require but fourteen to produce the yearly quantity ofcement we have named. There is not much difference in the treatment of theclinker, from that prevailing in England and other countries,except that, after leaving the millstones, the powder ispassed through a series of sieves securing a quality of fine-ness much beyond anything obtained in England. The total horse-power realized from the various steamengines is 382. The number of men employed is somewhereabout 800. The author has had recent opportunities for a thoroughexamination of this Stern Portland cement, from havingbeen employed by Mr. Gustav Grawitz to test the quality ofa shipment received in London during the winter of 1878-79.From the tests made and the results obtained, there can beno question about the correctness of the encomium passedupon it by General Gillmore and the Jury of the Phila-delphia Exhibition.
Text Appearing After Image:
GERMAN PORTLAND CEMENT. 309 Before recording his own tests, the author will placebefore the reader a series of experiments undertaken by thePomeranian branch society of German engineers and others.The first series were conducted under the personal super-vision of a Commission appointed by the Society inDecember, 1876. The Stern cement necessary for theseexperiments was obtained, and all the details of the testswere conducted by the Commissioners themselves; thebreaking of the briquettes having been witnessed by a largenumber of the members of the Society. The whole resultswere published in No. 3 (dated January 20th, 1877) of theweekly Journal of the Society of German Engineers. The briquettes were moulded in metal moulds placed on aplaster absorptive bed. The following are the results:— Tests Seven Days in Water. AVEEAGE OF TeN TeSTS. Neat cement; one cement and one sand; one cement and three sand.Lb. per sq. in. Lb. per sq. In. Lb. per sq. in. 7G4-49 347-04 212-63 Tests Twenty-eigh

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