PREN 13791 : DRAFT 2017

European foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions, symbols and abbreviations
4 Investigation objective and test parameters
5 Test regions, test locations and number of tests
6 Core testing and the determination of the in-situ
  compressive strength
7 Initial evaluation of the data set
8 Estimation of compressive strength for structural
  assessment of an existing structure
9 Assessment of compressive strength class of recently
  supplied concrete using in-situ testing
Annex A (normative) - Procedure for establishing a
        correlation between rebound number or UPV
        and compressive strength using test specimens
Annex B (informative) - Guidance on undertaking an
        investigation
Bibliography

Pertains to: - methods and procedures for the estimation of the in-situ compressive strength and characteristic in-situ compressive strength of concrete in structures and precast concrete components using direct methods (core testing) and indirect methods, e.g. ultra-sonic pulse velocity, rebound number; - principles and guidance for establishing the relationships between test results from indirect test methods and the in-situ compressive strength; - procedures and guidance on in-situ assessment of the compressive strength class of concrete where there is doubt over the strength of concrete recently supplied to a structure or precast concrete component.