ACI 214R-11 PDF
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St ACI 214R-11
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Ст ACI 214R-11
Original standard ACI 214R-11 in PDF full version. Additional info + preview on request
Full title and description
ACI 214R-11 — Guide to Evaluation of Strength Test Results of Concrete. Reported by ACI Committee 214, this guide presents statistical procedures and practical guidance for interpreting concrete strength test results (primarily molded-cylinder compressive strength) and for relating those results to specification and acceptance criteria used in construction and repair projects.
Abstract
This guide discusses sources of variability in concrete strength test results and describes statistical methods (means, standard deviation, coefficient of variation, normal-distribution assumptions, and acceptance criteria) useful for evaluating series of test results. Guidance is applicable to compressive-strength tests called out in common specifications and codes, and the statistical concepts are also applicable to other test results such as flexural strength, slump, air content, density, and modulus of elasticity.
General information
- Status: Published (ACI 214R-11; reapproved 2019).
- Publication date: April 2011 (first printing).
- Publisher: American Concrete Institute (ACI), Farmington Hills, MI.
- ICS / categories: Construction materials — concrete testing and evaluation (ICS ~91.100).
- Edition / version: ACI 214R-11 (original 2011; reapproved 2019).
- Number of pages: 16 pages (typical ACI report length for this item).
Scope
Provides procedures for evaluation and interpretation of strength test results obtained from standard molded-cylinder tests (ASTM C31/C31M casting and ASTM C39/C39M testing procedures are assumed where applicable). The guide addresses both within-batch and batch-to-batch variations, statistical analysis of series of tests, criteria for acceptance and investigation of low results, and extension of the statistical approach to other common concrete test properties. It is intended to support decisions in specifications, acceptance, and forensic evaluation of concrete performance.
Key topics and requirements
- Sources and types of variability in concrete strength (within-batch and batch-to-batch).
- Statistical descriptors: mean, standard deviation, coefficient of variation, and use of the normal distribution assumption.
- Analysis of strength data series and methods to determine whether results meet specified criteria.
- Guidance on acceptance criteria, required overdesign, and when investigation/remedial action is warranted.
- Application of the statistical approach to other test results (flexural strength, slump, air content, modulus, density).
- Relationship to common specifications and codes (references to ACI 301, ACI 318 and relevant ASTM test methods).
Typical use and users
Used by structural and materials engineers, quality-control/assurance personnel, testing laboratories, contractors, owners, and specifiers who need to evaluate concrete test-series results for acceptance, troubleshooting, specification development, or forensic assessment of existing construction.
Related standards
Commonly used alongside ACI 301 (Specifications for Structural Concrete), ACI 318 (Building Code Requirements for Structural Concrete), ASTM C31/C31M (Making and Curing Concrete Test Specimens in the Field), ASTM C39/C39M (Compressive Strength of Cylindrical Concrete Specimens), and related ACI reports on in-place strength estimation and nondestructive testing (for example ACI 228.1R and ACI 228.2R).
Keywords
concrete strength evaluation; statistical analysis; coefficient of variation; normal distribution; standard deviation; acceptance criteria; quality control; compressive strength; ASTM C31; ASTM C39; ACI 301; ACI 318.
FAQ
Q: What is this standard?
A: ACI 214R-11 is a guide published by the American Concrete Institute that provides statistical and practical guidance for evaluating concrete strength test results (primarily molded-cylinder compressive strength tests).
Q: What does it cover?
A: It covers sources of variability in concrete test results, statistical descriptors and analysis methods, acceptance criteria and recommendations for investigation when results are below expectations, and application of the statistical approach to other common concrete test properties.
Q: Who typically uses it?
A: Structural/materials engineers, testing labs, contractors, quality-control personnel, specifiers, and owners use the guide to interpret test-series data, set or review acceptance procedures, and make informed decisions about concrete quality and required remedial actions.
Q: Is it current or superseded?
A: ACI 214R-11 was published in April 2011 and has been reapproved (2019). It replaced the 2002 edition; users should confirm whether a later revision or replacement has been issued by ACI for their specific application before relying on the document as the sole authority.
Q: Is it part of a series?
A: It is an ACI committee guide (Committee 214) and is commonly referenced alongside other ACI reports and standards addressing concrete specifications, in-place strength estimation, and nondestructive evaluation (for example ACI 228.1R, ACI 228.2R, ACI 301, and ACI 318).
Q: What are the key keywords?
A: Coefficient of variation; normal distribution; strength variability; standard deviation; acceptance criteria; quality control; compressive strength; test-series evaluation.