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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: Study of a Method of Immediate Estimation of Concrete Strength
Author(s): Shoji Ikeda
Publication: Journal Proceedings
Appears on pages(s): 658-663
Keywords: acclerated tests;accelerating agents;aeration;coefficant of variation; compression tests;compressive strength;field tests;fresh concretes;mortars (material);quality control;test equipment;water-cement ratio.
Abstract:The method of immediate estimation of concrete strength using rapid hardening process is a method which can estimate concrete strength within about 1.5 hr after getting a sample from fresh concrete by means of compression test of rapidly hardened specimens. The rapidly hardened strength of specimens can be obtained by using the combination of addition of acceleraor and the high temperature curing. The strength of rapidly hardened mortar specimens which ae obtained by wet-screening of concree is clearly dependent on the water-cement ratio of onrete. Thus, there is high correlation between the 28-day strength of concrete and the strength of rapidly hardened mortar specimen. The coefficant of variation of the ratio of estimated strength at 1.5 hr to the actual 28-day strength of normal concretes was about 10 percent regardless of the brand of ordinary portland cement used in the laboratory test. Practiblity of this method was ascertained at the field test using a portable curing chamber and a compressive test apparatus.
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