Interrelations Between Cement and Compressive Strengths of Portland Cement Architecture Library TH RELATED PUBLICATIONS NBS Monograph 28-Causes of Variation in Chemical Analyses and Physical Tests of Portland Cement-25 cents* NBS Monograph 43-Chemistry of Cement Proceedings of the Fourth International Symposium-Washington 1960. Presented in two volumes. Volume I-$6.50. Volume II-$6.25. The two volumes at $12.75 a set. (Originally issued September 1962, and reprinted February 1964.) NBS Building Science Series 2 and 5-Interrelations between Cement and Concrete Properties. Part 1-35 cents. Section 1, Materials and Techniques. Section 2, Water Requirements of Portland Cement. Section 3, Occurrence of Minor and Trace Elements in Portland Cement. Part 2-35 cents. Section 4, Variables associated with expansion in the potential sulfate expansion test. Section 5, Heat of hydration of portland cement. Section 6, Variables associated with small autoclave expansion values of portland cements. *Order publications from Superintendent of Documents, Government Printing Office, Washington, D.C. 20402. (For foreign mailing, add one-fourth of the price of the publication.) Library of Congress Catalog Card Number: 64-60095 II Contents Section 7. Compressive strength of test mortars.. R. L. Blaine, H. T. Arni, and M. R. DeFore Section 8. Compressive strength of steam-cured portland cement Page Section 7. Compressive Strength of Test Mortars R. L. Blaine, H. T. Arni, and M. R. De Fore The relationships between cement characteristics and compressive strength of 1:2.75 Key Words: Chemical composition, fineness, heat of hydration, strength gain of 5.16. Compressive-strength-gain ratio, (1 year- 28 day)/28 day, (SGR(3)), for specimens 5.17. Compressive strength gain from 28 days to 5.18. Compressive-strength-gain ratio from 28 days to 10 years, (STXY-ST28)/ST28___ 5.19. Compressive-strength ratio of 1-year (water- stored/moist-air-stored) specimens 5.20. Compressive-strength ratio of 1-year (air- stored) to 28-day, water-stored specimens. Relationships of compressive strengths de- Early strength versus composition of the ce- ment, and the prediction of strength at 6.4. Coefficients, and their significance, of the major potential compounds, of other commonly determined variables and of the trace elements at different test ages... 6.5. Coefficients, and their significance, of the major oxides at different test ages... Compressive strength and heat of hydration. Air permeability and turbidimeter fineness values and compressive strength.. Compressive strength tests of 1:2.75 (cement to graded Ottawa sand) mortar cubes are required in Federal [1] and ASTM [2] specifications for portland cements. These plastic mortar tests were adopted in 1936 after considerable study, as a means for evaluating the strength producing properties of different portland cements. Although the test-mortar cannot be used to predict the strength characteristics of any and all concretes, it is considered indicative, to a limited extent, of 1 Figures in brackets indicate the literature references at the end of this These specification tests are usually made early ages, for example, 1 and 3 days, 3 and 7da |