Excerpt from The Modern Asphalt Pavement The Subsoil Base - As the foundation of a pavement, of any kind, is placed upon the soil and supported by the latter, it is a matter of vital importance that this latter support should be adequate, and it will only prove adequate if the subsoil is not subject to displacement from settlement or frost and is thoroughly drained. With sandy soils which are well compacted and which, from their nature, are well drained and dry there is no difficulty in the preparation of a satisfactory subgrade. Trenches in such soils, if they occur, can be solidly refilled with the aid of water. If the subgrade is a true sand, as in the neighborhood of seabeaches, it may be necessary, in order to compact the surface, to spread a course of gravel between the sand and the base in order to be able to roll it properly. 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.