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Excerpt from The Expansion and Contraction of Concrete and Concrete Roads White and the earlier investigators made tests on the _change in length of neat cement and mortar with specially designed micro meters on very small specimens, White's being only 4 inches in length. Obviously it would be impo-ssible'to use such small test pieces as these to determine the expansion and contraction of concrete containing coarse aggregates, and the type adopted was a column 8 inches square and 5 feet high. The column form of specimen was used to permit the free expansion of one end, in this way preventing friction from affecting the accuracy of the measurements. 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.