Title:
Concrete Q&A: Field- versus Standard-Cured Cylinders made from High-Strength Concrete
Author(s):
Publication:
Concrete International
Volume:
39
Issue:
8
Appears on pages(s):
64
Keywords:
DOI:
Date:
8/1/2017
Abstract:
I’m a technician with a testing laboratory. On one of my projects, I understand that the specified strength is 10,000 psi (68.9 MPa), based on compressive tests of field-cured cylinders. For quality assurance, we are also testing standard-cured cylinders. The field-cured cylinders are consistently breaking at strengths that are 25 to 35% lower than the standard-cured specimens. Why such a difference in strength?
Related References:
1. ASTM C31/C31M-15ae1, “Standard Practice for Making and Curing Concrete Test Specimens in the Field,” ASTM International, West Conshohocken, PA, 2015, 6 pp.
2. ASTM C511-13, “Standard Specification for Mixing Rooms, Moist Cabinets, Moist Rooms, and Water Storage Tanks Used in the Testing of Hydraulic Cements and Concretes,” ASTM International, West Conshohocken, PA, 2013, 3 pp.
3. Carino, N.J., and Meeks, K.W., “Curing of High-Performance Concrete for Strength—What is Sufficient?” Repair, Rehabilitation, and Maintenance of Concrete Structures and Innovations in Design and Construction, SP-193, V.M. Malhotra, ed., American Concrete Institute, Farmington Hills, MI, 2000, pp. 1-36.
4. Neville, A.M., Properties of Concrete, fifth edition, Pearson Education Limited, England, 2012, p. 326.