Curing of High-Performance Concrete for Strength-What is Sufficient?

Published

September 1, 2000

Author(s)

Nicholas J. Carino, K W. Meeks

Abstract

This paper reports the results of an exploratory study on the effects of curing duration on the variation of mortar strength with distance from the drying surface. A novel, notched cylindrical test specimen was adopted for measuring tensile strength at different depths. Two mortar mixtures with w/c of 0.30 and 0.45 were used; the former was assumed to be representative of the paste system in a high-performance concrete. Specimens were moist cured for (1, 3, or 7) d and then exposed to air at 25 C and 50 % or 70 % RH. The cylinders were sealed to simulate one-dimensional drying in a large member. Tensile strengths were measured at 28 d. Relationships between tensile strength and depth were compared with those of specimens continuously moist cured. The data tended to show that 1 d of moist curing might be sufficient to ensure adequate strength development at a depth of 25 mm from the exposed surface. The phenomenon of increasing strength with drying may have confounded the results, and recommendations for additional studies are provided.

Proceedings Title

Repair, Rehabilitation, and Maintenance of Concrete Structures, and Innovations in Design and Construction, 4th International Conference, International Conference | 4th | | American Concrete Institute

Volume

No. 193

Conference Dates

September 1, 2000

Conference Location

Seoul, KO

Conference Title

American Concrete Institute (ACI) Special Publications

Pub Type

Conferences

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Keywords

building technology, curing, high-performance concrete, mortar, statistical analysis, tensile strength

Citation

Carino, N. and Meeks, K. (2000), Curing of High-Performance Concrete for Strength-What is Sufficient?, Repair, Rehabilitation, and Maintenance of Concrete Structures, and Innovations in Design and Construction, 4th International Conference, International Conference | 4th | | American Concrete Institute, Seoul, KO, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=860271 (Accessed November 8, 2024)