Notes on Building Construction: Materials course for honors

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Longmans, Green, & Company, 1892
 

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Seite 302 - ... there is no word more ambiguous in its meaning than Possession. It is interchangeably used to describe actual possession and constructive possession which often so shade into one another that it is difficult to say where one ends and the other begins.
Seite 33 - When phosphorus is perfectly pure it is semitransparent, and has the consistence of wax : it is so soft that it may be cut with a knife. Its specific gravity is from 1.77 to 2.03.
Seite 316 - ... changes of temperature ; although time is an element in the change which takes place in every material, any increase of deflection in a loaded girder may be traced to atmospheric action, vibration, change of load and temperature : remove these disturbing causes and the deflection will remain fixed. Cast iron of average quality loses strength when heated beyond a mean temperature of 220°...
Seite v - COURSE OF BUILDING CONSTRUCTION. Notes on Building Construction. Arranged to meet the requirements of the Syllabus of the Science and Art Department of the Committee of Council on Education, South Kensington.
Seite 168 - The whole of the cement shall be Portland cement of the very best quality, ground extremely fine, weighing not less than 112 Ibs. to the striked bushel, and capable of maintaining a breaking weight of 350 Ibs. per square inch seven days after being made in a mould, and immersed in water during the interval of seven days.
Seite 261 - ... highly elastic, malleable, ductile, forgeable, weldable, and capable of receiving very different degrees of hardness by tempering, even so as to cut wrought iron with facility, and fusible in furnaces ; and, lastly, when present in greater proportion than in steel, we have cast iron, which is hard, comparatively brittle, and readily fusible, but not forgeable or weldable.
Seite 253 - Liquid Iron Asphalt can be made either of natural or artificial asphalt, mixed with pulverised iron ore or sesquioxide of iron, and a small proportion of mineral tar. The materials are put into a caldron which is brought on to the works, and are made into a liquid state by heat, run over the surface, and smoothed in the same way as the other liquid asphalts mentioned ; the thickness usually laid is about 2 in.
Seite 122 - ... brick. The presence of 3 per cent of combined lime, soda, potash, and magnesia should be a cause for rejection. The sulphide of iron — pyrites — is even worse than the substances first named. A good fire-clay should contain from 52 to 80 per cent of silica and 18 to 35 per cent of alumina and have a uniform texture, a somewhat greasy feel, and be free from any of the alkaline earths.
Seite 134 - Such a mechanical fit cannot be obtained with stoneware or earthenware pipes, owing to the difficulty of preserving perfect accuracy of form during the process of burning." "In the Stanford joint tightness is obtained by casting upon the spigot and in the socket of each pipe, by means of moulds prepared for the purpose, rings of a cheap and durable material, which, when put together, fit mechanically into each other, and by making these rings of a spherical form, a certain amount of movement or settlement...
Seite 243 - CEMENT is a plaster produced by recalcining plaster of Paris after soaking it in a saturated solution of alum. It is made in two qualities, coarse and superfine. The latter is white and capable of receiving a high polish ; the former is not so white or able to take so good a polish, but sets hard. It is used for interior decorations, artificial marbles, cornices, etc.

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