File:Architect and engineer (1935) (14595551939).jpg

Identifier: architectenginee12135sanf (find matches)
Title: Architect and engineer
Year: 1905 (1900s)
Authors:
Subjects: Architecture Architecture Architecture Building
Publisher: San Francisco : Architect and Engineer, Inc
Contributing Library: San Francisco Public Library
Digitizing Sponsor: San Francisco Public Library

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
d of opportunity. It involves the mixingof carefully selected mineral pigments withthe concrete in the topping. The color rangeis quite wide, although the reds, brownsand greens have been most widely used. Itis essential that the pigments are of mineralor non-organic extraction, for organic color-ings have been found to react unfavorablywith concrete. Best results with pigments are probablysecured by mixing the dry color with thecement under factory control. By carefullyweighing the materials, however, good re- THE ARCHITECT AND ENGINEER ^ 26 ^ JUNE, NINETEEN THIRTV-FIVE suits may be expected with field mixed ma- use of contrasting aggregates in adjoining terials. Tlie accompanying table gives ap- sections was ttie beginning of the new deco- proximate quantities of pigment required, ration with terrazzo: closely followed by a assuming concrete proportioned as previ- departure in the manner of spacing and ously recommended. Some pigments have placing the metal strips. Today, the possi-
Text Appearing After Image:
TEN YEARS OF TRUCKING HEAVY LOADS HAS NOT MARRED THIS CONCRETE FLOOR FINISHCrushed trap rock aggregate was used in this wearing course and the surface was finished by trowehng. The hardwearing quahty of the floor is largely due to the control o!^ the water-cement ratio in mixing and adequate curing. more color value than others and should beused accordingly. After a floor colored with integral pig-ment has been cured, dried and cleaned, itmay be waxed or polished exactly as awood floor. This brings out the color andgives a gloss to the surface. Many architects have taken advantage ofconcretes early plasticity to strike off geo-metric designs in it; if sharper lines are de-sired, a carborundum wheel, working overthe hardened surface, can be utilized. Possibly the most popular form of con-crete floor is terrazzo—a floor in which thewearing surface is composed largely of col-ored marble chips or other aggregates. Oneof the features of terrazzo, its subdivisioninto units by the use of b

Note About Images