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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: Simplified Description of Creep Surface for a Portland Cement Mortar
Author(s): Leonard G. Tulin
Publication: Journal Proceedings
Appears on pages(s): 470-476
Keywords: creep (materials);dimensional analysis;models;mortars (material);plain concrete;portland cements;regression analysis;research;rheological properties;shrinkage;strains;stresses.
Abstract:The purpose of this study is the analysis of creep of plain portland cement mortar under uniform compressive stress from a phenomenological viewpoint with the objective of obtaining an alternate form of the strain-stress-time rela-tionship to that obtained from visco-elastic analysis. The aim is to obtain relationships which are more usable than the expressions obtained from the analysis of rheological models. The techniques of dimensional analysis are used to organize an experimental program and to determine the form of the expression describing the strain-stress-time surface. A suitable least squares method is used in the numerical evaluation of parameters in the equation of the surface, and some conclusions are drawn regarding the validity of the results. Comparison of the simplified equation of the creep sur-face with the results obtained from visco-elastic analyses shows that the alternate form for the surface is indeed simpler and therefore more usable than the results ob-tained from the analysis of rheological models. In this regard the objective of this investigation has been met.
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