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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Relationship between Nonevaporable Water Content and Hardened Properties of High-Performance Mixtures
Author(s): R. C. A. Pinto, S. V. Hobbs, and K. C. Hover
Publication: Special Publication
Appears on pages(s): 351-366
Keywords: compressive strength; high-performance concretes; ignition; silica fume; velocity; water
Abstract:The hardening of concrete mixtures is caused by chemical reactions occurring in the Portland cement paste fraction of the mixture. The extent of these reactions is related to the non-evaporable water content in the reaction products, and determine hardened properties of the concrete mixture. High-performance concrete mixtures often contain cementitious materials in addition to portland cement that increase strength and /or durability. These cementations materials can modify the rate of reactions and thus the development of mechanical properties. This work studied non-evaporable water content in low w/c mixtures with and without silica fume in relation to the development of compressive strength and ultrasonic pulse velocity over time. Results were compared with those for a conventional mixture with a moderate w/c. It was observed that the long-term non-evaporable water contents were higher for the conventional mixture than for the low w/c mixtures. The addition of 10% silica fume in the low w/c mixtures caused an even lower long-term non-evaporable water content. This addition of silica fume did not affect the relationship between non-evaporable water content and ultrasonic pulse velocity, but did affect the relationship between non-evaporable water content and compressive strength beyond a certain degree of cement hydration.
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