Concrete is an ancient material of construction, first used during the Roman Empire, which extended from about 20 . to 200 . The word concrete is derived from the Roman concretus, meaning to grow together. Although this early mixture was made with lime, cement, and a volcanic ash material called pozzolana, concrete today is a sophisticated material to which exotic constitutents can be added and, with computer-controlled batching, can produce a product capable of achieving 50,000 psi compressive strength | Construction Building Envelope and Interior Finishes Databook Sidney M. Levy McGraw-Hill New York San Francisco Washington . Auckland Bogotá Caracas Lisbon London Madrid Mexico City Milan Montreal New Delhi San Juan Singapore Sydney Tokyo Toronto Library of Congress Cataloging-in-Publication Data Levy Sidney M. Construction building envelope and interior finishes databook Sidney M. Levy. p. cm. ISBN 0-07-136022-0 1. Exterior walls Materials Handbooks manuals etc. 2. Interior walls Materials Handbooks manuals etc. 3. Doors Materials Handbooks manuals etc. 4. Windows Materials Handbooks manuals etc. I. Title. 2000 690 .12 dc21 00-055048 McGraw-Hill A Division ofTheMcGraw-HillCompanies Copyright 2001 by The McGraw-Hill Companies Inc. All rights reserved. Printed in the United States of America. Except as permitted under the United States Copyright Act of 1976 no part of this publication may be reproduced or distributed in any form or by any means or stored in a data base or retrieval system without the prior written permission of the publisher. 1234567890 KGP KGP 0 6 5 4 3 2 1 0 ISBN 0-07-136022-0 The sponsoring editor for this book was Larry S. Hager and the production supervisor was Pamela A. Pelton. It was set in Century Schoolbook by The PRD Group Inc. Printed and bound by Quebecor Kingsport. McGraw-Hill books are available at special quantity discounts to use as premiums and sales promotions or for use in corporate training programs. For more information please write to the Director of Special Sales Professional Publishing McGraw-Hill Two Penn Plaza New York NY 10121-2298. Or contact your local bookstore. Information contained in this work has been obtained by The McGrawHill Companies Inc. McGraw-Hill from sources believed to be reliable. However neither McGraw-Hill nor its authors guarantee the accuracy or completeness of any information published herein and neither McGraw-Hill nor its authors shall be responsible for any errors omissions or .
