Portland cement, its manufacture, testing, and use

ISBN 10: 1130548120 / ISBN 13: 9781130548129
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Portland cement, its manufacture, testing, and use. N° de ref. de la librería

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Sinopsis: This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1905 Excerpt: ...got in, the point D is placed in the eye at that end, and the screw point is very carefully screwed into the opposite eye; the screw is stopped when the pointer D is exactly opposite the middle point of the scale F. It is very often found necessary, however, to gently wriggle both clips successively in the eyes, to avoid the points sticking in the wrong place; the same object may also be effected by lifting the beam, while in the clips, off the platform, and gently spinning it on the points. The screw is then twisted again to readjust the needle D on the centre of the scale F, and the reading taken. The reading on the scale is easily converted into the actual measurements of the test prism. The reading on C is expressed as a whole number, say 7, and on the wheel as hundredths, say 48; then the beam actually measures 7-48 half millimetres, i.e. 3-74 mm., in addition to the standard length from the point of D to the point of B, when the scales are at zero, viz. 95 mm. Thus the bar measures 95 + 3-74 nim. = 98-74 mm. Carefully measured bars of cement and wood arc supplied, with their lengths, and corrections for change of length due to variation in temperature, inscribed thereon, which are used to test the accuracy of the graduations, and allow for wear of the points by use. The bars never vary much in length from 100 mm., and therefore the increase or decrease in the length of a bar is expressed directly in. percentages. This apparatus is also adapted for measuring the expansion of cement after subjection to a hot water bath of any desired temperature, and may thus, as with the hereafter described Chatelicr test, be termed a quantitative test for expansion, in contradistinction to the ordinary pat tests, which arc only qualitative. Another device, for measuri...

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Título: Portland cement, its manufacture, testing, ...
Condición del libro: Good

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David Butler Butler
ISBN 10: 1130548120 ISBN 13: 9781130548129
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Descripción Estado de conservación: Very Good. Book Condition: Very Good. Nº de ref. de la librería 97811305481293.0

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David Butler Butler
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ISBN 10: 1130548120 ISBN 13: 9781130548129
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Descripción RareBooksClub.com. Paperback. Estado de conservación: VERY GOOD. Cover and pages show some wear from reading and storage. May have light creases on the cover and binding. Some pages may contain writing and or highlighting. Nº de ref. de la librería 2673056886

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David Butler Butler
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ISBN 10: 1130548120 ISBN 13: 9781130548129
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Ergodebooks
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Descripción RareBooksClub.com, 2012. Paperback. Estado de conservación: Used: Very Good. 2002. This item is printed on demand. Nº de ref. de la librería SONG1130548120

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