Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: TESTING OF CEMENT. The methods of testing cement which have been considered standard by American engineers are those adopted by the American Society of Civil Engineers in 1885, being recommended by a strong committee with full theoretical and practical knowledge of the subject. Lately it has been felt that this report was not quite up to the advances which have been made in the manufacture of Portland cement, and another equally strong committee has been appointed to consider the subject. This committee brought in a progress report in January, 1903, and made some modifications of the report in January, 1904. At the same time it reported that some points had not yet been settled and therefore asked for a continuance. The American Society for Testing Materials has also had a strong committee at work upon the subject, arid this committee has made a report which has been officially adopted by the Society. It embodies much of the matter and phraseology of the report to the American Society of Civil Engineers, and is given in full as the only official statement of standard practice. The methods of examination recommended are given in this chapter and the specifications will be found in the following chapter. Following this official document will be found a statement of such matters in the report to the American Society of Civil Engineers as were omitted from this document. METHODS OF THE AMERICAN SOCIETY FOR TESTING MATERIALS. General Observations.—1. These remarks have been prepared with a view of pointing out the pertinent features of the various requirements and the precautions to be observed in the interpretation of the results of the tests. 2. The Committee would suggest that the acceptance or rejection under these specifications be based on tests made by an experien...