File:Cement houses and how to build them. (1908) (14783062695).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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han anythingelse that the marketing of the block de-pends. It is, therefore, important to se-cure uniformity of color and an effect thatwill be pleasing to the eye. This requiresconstant study to attain in its perfectionand is one of the greatest problems of thebusiness. For colored blocks dark coloredcements may be used to the best advantage,but their color should be uniform. Forlighter blocks cement of lighter color mustbe used. Cement gets lighter as it isground finer and only finely ground cementshould be employed for this work. Ce-ments that were free of manganese andiron would be white and the color growsdark as the percentage of iron and man-ganese increases, but most cements have more iron than manganese and the color,therefore, is due to the iron. Sulphate of lime, which always is addedto cement to regulate the set, is responsiblefor the white efflorescence of blocks. Thesalt is soluble and is carried to the surfaceof the blocks during the curing process. Finjam Fi-oorqPaper*
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Fig. 25—Section showing the details of construction atthe level of the water table, or first floor level. In coloring artificial stone to a gray the use of one pound of Germantown lamp-black mixed with cement dry, and onepound of salt previously dissolved to everyten gallons of water greatly assists towaterproof the product, but does not makean absolutely waterproof stone, althoughincreasing the lampblack makes the stoneless absorbent, but it will darken the colorand affect the durability. Black stone is produced by addingperoxide of manganese to the cement at aproportion of twelve to fifty pounds perbarrel of cement. The amount is governed 38 CEMENT HOUSES AND HOW TO BUILD THEM. by the color of the sand and cement orby adding from two to four pounds of ex-celsior carbon black to each barrel ofcement. The manganese in a measure pre-vents the absorption of water, but the ex-celsior carbon does not; the first reducesthe strength and the other has little or noeffect upon the durability

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