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Download ebook Masonry; An Elementary Text-Book for Students in Trade Schools and Apprentices

Download ebook Masonry; An Elementary Text-Book for Students in Trade Schools and Apprentices

Masonry; An Elementary Text-Book for Students in Trade Schools and Apprentices.cGeorge R Barham
Masonry; An Elementary Text-Book for Students in Trade Schools and Apprentices
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Author: George R Barham
Number of Pages: 44 pages
Published Date: 14 May 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: English
ISBN: 9781231958186
File size: 35 Mb
File Name: Masonry;.An.Elementary.Text-Book.for.Students.in.Trade.Schools.and.Apprentices.pdf
Download Link: Masonry; An Elementary Text-Book for Students in Trade Schools and Apprentices
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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. 1914 Excerpt: ... for the stone. It is preferable to bed the stone so that the beds are left open for about 8 of an inch from the face, to prevent flushing or splintering of the stone due to imperfect bedding. The joints so left may be pointed with mason's putty when cleaning down. Mason's putty is composed of well-slaked lime, carefully screened of small lumps and overburned particles, and stone dust in about equal proportions. The mixture, with the addition of sand, is often used for bedding stones, but the practice is not a good one, and the putty in the interior of the bed seldom sets. The lime is dependent upon the chemical action set up by H combination with the carbonic acid in the air, and only the outer casing is acted upon, forming an air-tight skin, and keeping the material at the interior of the bed in a plastic state. The sand to some extent forms small channels or ducts; but hydraulic lime and Portland cement is so easily obtained and perfectly manufactured, that it is better to use them for bedding and jointing. Grout is made from neat Portland cement and water. It does not set so hard as cement mixed with a less quantity of water, and should not be made too thin. Grout is used for flushing up joints, and also for filling in the joggles cut in joints. The practice of working beds hollow, or of bedding the stone hollow, cannot be too strongly condemned. Hollow beds, whether worked on the stone or produced by the mortar, causes the weight to be transferred to the edges of the stone, resulting sooner or later in spalling (see Fig. 261). The same bad effect results when stone is worked " lean" at the back and is packed with slate or sheet lead. Where walls have battered or sloping faces, it is preferable to have the bed worked normal to the face for a s...

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