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Bulletin - American Railway Engineering Association Volume 22, Nos. 230-235 (Paperback) Loot Price: R888 Discovery Miles 8 880
Bulletin - American Railway Engineering Association Volume 22, Nos. 230-235 (Paperback): American Railway Association
Bulletin - American Railway Engineering Association Volume 22, Nos. 230-235 (Paperback): American Railway Association

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Bulletin - American Railway Engineering Association Volume 22, Nos. 230-235 (Paperback)

American Railway Association

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Loot Price R888 Discovery Miles 8 880

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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. 1920 Excerpt: ...for sea water work should be mixed in the proportions of one part Portland Cement to not more than six parts of fine and coarse aggregates, measured separately and combined in such proportions as will produce a concrete of maximum density and impermeability. Only enough water should be added to secure plastic workability. The concrete shall be mixed in a batch mixer for not less than two minutes after all the materials are in the drum. Where concrete is deposited into sea water, the above proportions should be reduced to one part of cement to not more than five parts of separately measured aggregates. Tests should be made from time to time during the progress of the work to maintain the proper proportions of the aggregates throughout construction. 2. Concrete should be deposited in the air wherever practicable. When necessary to deposit concrete in water, it should be protected from currents by cofferdams or similar means. 3. The concrete, where practicable, should be deposited in a continuous operation to a point 5 ft. above high water. In case of unavoidable stoppage of the work, the previously cast concrete should be thoroughly cleaned of all laitance. 4. From 2 ft. below low water to 2 ft. above high water, or from a plane below to a plane above wave action, the face of the concrete should be adequately protected against mechanical abrasion and frost action. Construction or other joints should in every case be avoided within this zone. Sharp corners and projections should also be avoided, but where necessary they should be rounded to reduce abrasion to a minimum. 5. If reinforcement is used in concrete in sea water, special attention should be given in the design to the position of the reinforcement. In no case should the steel be nearer than 3 in. to a...

General

Imprint: Rarebooksclub.com
Country of origin: United States
Release date: March 2012
First published: March 2012
Authors: American Railway Association
Dimensions: 246 x 189 x 18mm (L x W x T)
Format: Paperback - Trade
Pages: 328
ISBN-13: 978-1-130-65583-4
Barcode: 9781130655834
Categories: Books
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LSN: 1-130-65583-0

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