Who is Watching Out for the Cylinders?

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Title: Who is Watching Out for the Cylinders?

Author(s): Karthik H. Obla, Orville R. (Bud) Werner, John L. Hausfeld, Kevin A. MacDonald, Gregory D. Moody, and Nicholas J. Carino

Publication: Concrete International

Volume: 40

Issue: 8

Appears on pages(s): 28-35

Keywords: curing, strength testing, test cylinders, specifications

DOI: 10.14359/51710889

Date: 8/1/2018

Abstract:
Standard curing involves initial curing at the job site under stipulated conditions. Field observations, however, show that on-site initial curing is often not done in accordance with ASTM C31/C31M. It should be possible to improve initial curing of acceptance test specimens by implementing the recommendations in this article.

Related References:

1. ACI Committee 318, “Building Code Requirements for Structural Concrete (ACI 318-14) and Commentary (ACI 318R-14),” American Concrete Institute, Farmington Hills, MI, 2014, 519 pp.

2. ASTM C31/C31M-18, “Standard Practice for Making and Curing Concrete Test Specimens in the Field,” ASTM International, West Conshohocken, PA, 2018, 6 pp.

3. 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.

4. “Concrete Testing Adherence Program,” CRMCA, Denver, CO, www.crmca.org/assessment-program. (last accessed Apr. 12, 2018)

5. Bloem, D.L., “Effect of Curing Condition on Compressive Strength of Concrete Test Specimens,” NSGA Circular No. 59 and NRMCA Publication No. 53, 1954, 15 pp.

6. Meininger, R., “Effects of Initial Field Curing on Standard 28-Day Cylinder Strengths,” Cement, Concrete, and Aggregates, V. 5, No. 2, 1983, pp. 137-141.

7. Montoya, R., “Hot Weather Comparison Program – Fresh Concrete Testing and Initial Curing Practices,” Report to General Membership, New Mexico Ready Mix Concrete and Aggregates Association, Albuquerque, NM, Apr. 1995, 11 pp.

8. Obla, K.H.; Rodriguez, F.; and Ben-Barka, S., “Effects on Non-Standard Curing on Strength of Concrete: A Research Project at the NRMCA Research Laboratory – Series D 335 and D 338,” Concrete in Focus, V. 3, No. 4, Winter 2005, pp. 57-59.

9. Kane, K.; Laker, T.; and Morrical, S., “Improving the Quality of Concrete Testing,” Concrete International, V. 37, No. 8, Aug. 2015, pp. 33-40.

10. ASTM C78/C78M-18, “Standard Test Method for Flexural Strength of Concrete (Using Simple Beam with Third-Point Loading),” ASTM International, West Conshohocken, PA, 2018, 5 pp.

11. ASTM C1202-17a, “Standard Test Method for Electrical Indication of Concrete’s Ability to Resist Chloride Ion Penetration,” ASTM International, West Conshohocken, PA, 2017, 8 pp.

12. ASTM C42/C42M-16, “Standard Test Method for Obtaining and Testing Drilled Cores and Sawed Beams of Concrete,” ASTM International, West Conshohocken, PA, 2016, 7 pp.

13. ACI Committee 301, “Specifications for Structural Concrete (ACI 301-16),” American Concrete Institute, Farmington Hills, MI, 2016, 64 pp.

14. ACI Committee 311, “Specification for Testing Ready-Mixed Concrete (ACI 311.6-09),” American Concrete Institute, Farmington Hills, MI, 2009, 5 pp.

15. “2018 International Building Code (IBC),” first edition, International Code Council, Washington, DC, 2017, 726 pp.

16. “AIA MasterSpec, Section 033000 – Cast-in-Place Concrete,” American Institute of Architects, Washington, DC, 2014, 58 pp.

17. ACI Committee 132, “Guide for Responsibility in Concrete Construction (ACI 132R-14),” American Concrete Institute, Farmington Hills, MI, 2014, 11 pp.

18. “NRMCA/ASCC: Checklist for the Pre-Construction Conference,” National Ready Mixed Concrete Association, Silver Spring, MD, and American Society of Concrete Contractors, St. Louis, MO, 2016, 18 pp.




  

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