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This document presents the United States Government’s official specifications for Portland cement. It provides detailed guidelines and requirements for the composition, testing, and performance of this essential construction material. Intended for use by engineers, architects, contractors, and government agencies, this specification ensures uniformity and quality in construction projects across the nation. Covering aspects such as chemical composition, physical properties, and testing procedures, this specification serves as a critical reference for ensuring the durability and safety of infrastructure and buildings. 'United States Government Specification For Portland Cement' remains a valuable resource for those involved in the construction industry and governmental oversight. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.