Detail publikace

High-Strength Concrete - NDT with Rebound Hammer - Influence of Aggregate on Test Results

BROŽOVSKÝ, J.

Originální název

High-Strength Concrete - NDT with Rebound Hammer - Influence of Aggregate on Test Results

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Rebound hammer is the most frequently used non-destructive method for determination of concrete strength. Measurement results are influenced by various factors (components and composition of concrete, humidity or age), which are well known for normal-weight concrete. High-strength concrete differs in quality and the question is to which extent these factors influence the test results. Knowledge about influence of aggregate and results of measurements with Schmidt rebound hammer are stated. Test results and evaluation of compressive strength are considerably influenced by strength of parent material from which the coarse aggregate is made. Influence of granulometric curve is less important and for aggregate with strength over 90 MPa it is negligible. To determine compressive strength of high strength concrete with Schmidt rebound hammer, it is necessary to elaborate special calibration relations for aggregate with various strength of parent rock. Use of calibration relations elaborated for normal-weight concrete for determination of strength of HSC is problematic (different properties of aggregate and upper limit of calibration relations is 60 MPa). Shifting the upper limit of calibration relations for normal-weight concrete up to the maximal rebound value measured at testing HSC is not recommendable; values of compressive strength calculated in accordance with adjusted formulas are smaller than real strength of HSC.

Klíčová slova

high strength concrete, rebound hammer, rebound number

Autoři

BROŽOVSKÝ, J.

Rok RIV

2014

Vydáno

1. 7. 2014

Nakladatel

Taylor & Francis Ltd.

Místo

UK

ISSN

1058-9759

Periodikum

Nondestructive Testing and Evaluation

Ročník

29

Číslo

3

Stát

Spojené království Velké Británie a Severního Irska

Strany od

255

Strany do

268

Strany počet

14

BibTex

@article{BUT100248,
  author="Jiří {Brožovský}",
  title="High-Strength Concrete - NDT with Rebound Hammer - Influence of Aggregate on Test Results",
  journal="Nondestructive Testing and Evaluation",
  year="2014",
  volume="29",
  number="3",
  pages="255--268",
  doi="10.1080/10589759.2014.914205",
  issn="1058-9759"
}