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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: Early Age Concrete Strength Determination by Pullout Testing and Maturity
Author(s): Thomas J. Parsons and Tarun R. Naik
Publication: Special Publication
Appears on pages(s): 177-200
Keywords: age-strength relation; compressive strength; concretes;
nondestructive tests; pullout tests; regression analysis;
Abstract:This paper reports results of an investigation of the use of pullout testing and the maturity method to predict the early age strength of concrete. Concrete specimens, composed of 12 variations of 2 cement types, 2 aggregate types, and 3 water-cement cured at different temperatures: 37OF (2.8°C), and the outdoor environ-Cylinder compression and pullout tests were performed on specimens at ages ranging from 12 to 168 hours (7 days). Regression equations for cylinder strength and maturity, and pullout force and maturity are developed where the maturity is modified by changing the datum temperature from -10° C to 0° C to improve the predictive capabilities. A model for the prediction of the cylinder strength in terms of maturity is developed, as well as a oncrete strength by the pullout ombining cylinder strength and The reliability of the pullout model was affected by the comparative rates of strength gain of the cylindrical specimens and the slab specimens.
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