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Transactions Volume 19-20 book

Transactions Volume 19-20 book

Transactions Volume 19-20. Engineering Institute of Canada

Transactions Volume 19-20
Author: Engineering Institute of Canada
Page Count: 164 pages
Published Date: 01 May 2012
Publication Country: Miami Fl, United States
Language: English
Format: eBook
ISBN: 9781236060969
File Name: Transactions.Volume.19-20.pdf
Download Link: Transactions Volume 19-20

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. 1906 Excerpt: ...stirred. (6) 20 bushels of medium coarse sand, screened of all material of an inch and over, are heated to drive off the moisture. (c) The asphalt and sand are then thoroughly mixed by hand on the mixing-board. Laying on Macadam Roadways. A furrow is picked up along the edge of the crossing so as to produce the desired camber and to prevent the wheels of vehicles from cutting into the asphalt. A load or two of tarred gravel in addition to this may be required along the length of the crossing. The asphalt surface mixture is then laid on the foundation as prepared to a depth of two inches. It is well tamped and pounded along the edges and thoroughly rolled with a heavy twoman roller, the surface of the roller and the pounder being first well oiled so as to prevent the mixture from adhering to them. A thin coating of cement is then sprinkled over the wearing surface and wetted down, about one pound of cement being required for every ten square feet of crossing. Should the crossing require to be used on the same day or if the work is done in very hot weather, some limestone screenings spread over it and well wetted down will act as a protection. Asphalt walks are constructed in a similar manner, with the exception of the foundation course. The ground is cleared of all loose material and graded to a firm, even base, cinders well sprinkled and tamped being used to bring the walk to the required elevation. On the cinders is placed a 4-inch layer of tarred gravel. This course is pounded to give a firm, even bearing for the surface mixture, which is then laid as before. On a heavily travelled street with the roadway abutting the walk, a concrete curb of the usual design is built in place along the outer edge of the walk. Wherever feasible, however, the usual custom ...

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