Book Description

Excerpt from Reinforced Concrete Field Handbook Cement as it is received on the work, is well known as a fine, almost impalpable grayish powder. The one necessity, which on construction work becomes almost second nature, is to keep the cement dry in handling and storing. Portland Cement is an artificial mixture in certain well defined proportions established by practice, of lime, silica, alumina and other substances in minor quanti ties. Lime, mixed and calcined with clay, has the property of setting under water. A natural cement is made from rocky conglomerates which may contain the approximate quantities required, and which varies in its properties as the constituents of the natural de posits vary in proportion. Portland cement on the other hand is an exact artificial composition in pro portions determined by analysis and experiment. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.