File:Cement houses and how to build them. (1908) (14596389769).jpg

Identifier: CementHousesAndHowToBuildThem (find matches)
Title: Cement houses and how to build them.
Year: 1908 (1900s)
Authors: William A. Radford
Subjects: house plans -- catalogs domestic architecture cement houses concrete houses
Publisher: Radford Architectural Company
Contributing Library: MBJ collection

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rn the properamount by experimentation and then pre-serve the same measure for each block. Injury by too Little Water. The in- CEMENT HOUSES AND HOW TO BUILD THEM. 35 jurious effects of using too little water are How to Overcome Concrete Troubles. shown in the following table prepared r—*—. ~- xr • r> i m. after a series of tests, the proportions of JJ5S , f ^ the mortar being one part cement and two T* ,°f ? T?0* f TT * ? &r_ of sand- «-« tificial stone that are contended with and TENSILE STRENGTH-POUNDS PER SQUARE J™ n^ reived the attention they shonld inch. ±r(>m makers of blocks. Hair cracks, be- Water—Pet. ...8% 12% 14% 16% 18% 20% ing on the surface, are no indication of a 7Tda^°f TZ26I 433 392 368 338 301 weakness of the block- It has been known 28 days 344 470 447 436 422 407 for some time that very wet concrete is !££&:::::& SS S Z % S moreh*t0craze than ^ concreteis- 12 months 300 463 478 434 446 474 Dry concrete is objectionable to some on
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Fig. to—Here are shown the essential details of wood work around the window frames in connection with con-crete blocks. Immersing Concrete Blocks. Cement,while setting, is injured by sudden changes,in dampness, temperature or air drafts.Therefore, to dip a newly made block intowater is injurious. Mix the concrete andsprinkle the water on the dry composition,and keep sprinkling for six or eight daysafter molding, being careful to avoid allsudden changes. the claim that it is lacking in strei%th anddensity, and on that account its use is notadvocated because hair cracks are to someextent avoided. Investigation leaves nodoubt of the fact that in wet concretea portion of the very finest particles of ce-ment is carried to the surface by the actionof the excess water which is being ab-sorbed by the atmosphere. This excess 36 CEMENT HOUSES AND HOW TO BUILD THEM. water is to a large extent drawn from theinterior of the concrete to the exterior,carrying with it the finer particles, which,hei

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