Characteristic Curve and Its Use in Determining the Compressive Strength of Concrete by the Rebound Hammer Test

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F19%3APU133031" target="_blank" >RIV/00216305:26110/19:PU133031 - isvavai.cz</a>

Result on the web

<a href="https://www.mdpi.com/1996-1944/12/17/2705" target="_blank" >https://www.mdpi.com/1996-1944/12/17/2705</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/ma12172705" target="_blank" >10.3390/ma12172705</a>

Result language

angličtina

Original language name

Characteristic Curve and Its Use in Determining the Compressive Strength of Concrete by the Rebound Hammer Test

Original language description

During the construction of concrete structures, it is often useful to know compressive strength at an early age. This is an amount of strength required for the safe removal of formwork, also known as stripping strength. It is certainly helpful to determine this strength non-destructively, i.e., without any invasive steps that would damage the structure. Second only to the ultrasonic pulse velocity test, the rebound hammer test is the most common NDT method currently used for this purpose. However, estimating compressive strength using general regression models can often yield inaccurate results. The experiment results show that the compressive strength of any concrete can be estimated using one’s own newly created regression model. A traditionally constructed regression model can predict the strength value with 50% reliability, or when two-sided confidence bands are used, with 95% reliability. However, civil engineers usually work with the so-called characteristic value defined as a 5% quantile. Therefore, it appears suitable to adjust conventional methods in order to achieve a regression model with 95% one-sided reliability. This paper describes a simple construction of such a characteristic curve. The results show that the characteristic curve created for the concrete in question could be a useful tool even outside of practical applications.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20101 - Civil engineering

Project

<a href="/en/project/GA19-22708S" target="_blank" >GA19-22708S: New approaches to predicting air-entrained concrete durability by means of determination of pore size distribution and freeze-thaw resistance</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Materials

ISSN

1996-1944

e-ISSN

—

Volume of the periodical

12

Issue of the periodical within the volume

17

Country of publishing house

CH - SWITZERLAND

Number of pages

17

Pages from-to

1-17

UT code for WoS article

000488880300058

EID of the result in the Scopus database

2-s2.0-85071839499