Student:	Mustafa Haluk FILIZ
Supervisor:	Assoc. Prof. Dr. Metin HUSEM
Department:	Civil Engineering
Institution:	Graduate School of Natural and Applied Sciences
University:	Karadeniz Technical University, Turkey

Title of the Thesis:	DETERMINATION OF RELATION BETWEEN CONCRETE CORE STRENGTHS AND STANDARD CYLINDER
Level:	M.Sc.
Acceptance Date:	30/10/2006
Number of Pages:	85
Registration Number:	i1769

Summary:

Firstly, repairment and reinforcement studies of structures, quality control of hardened

concrete is essential. Though destructive, semi destructive and non destructive methods are

used in the quality of hardened concrete, destructive methods are known more reliable. The

method of taking core specimen among the other destructive methods is used most

commonly. In this method, cylindrical core specimens are taken from appropriate locations of

a structure and the specimens are tested to estimate the quality of concrete. In practice,

concrete class introduced as a function of strength of standard specimen, all of the parameters

must be considered in order to convert from the strength of core specimen to strength of

standard specimen.

The main purpose of this study is to investigate the effect of cure condition which is one

of the important parameters. The first section is one for an overview, whereas in the second

section, concrete test specimens with different compositions and cure conditions are

produced. In the third section, central compressive and rebound hammer tests have been made

on test samples, obtaining compressive strengths and rebound hammer values of samples.

Findings from testing are comparatively studied. Conclusions and recommendations from

entire study are summarized in the fourth section. Finally, a reference list is given.

The conclusions show that it is impossible to estimate the concrete class truly without

considering the effect of cure conditions.

Key Words: Hardened Concrete, Destructive Method, Core, Standard Cylinder Specimen,

Cure Condition.