Student:	Emre ÖZÇELİK
Supervisor:	Prof. Dr. Kenan GELİŞLİ
Department:	Jeofizik Mühendisliği
Institution:	Graduate School of Natural and Applied Sciences
University:	Karadeniz Technical University Turkey

Title of the Thesis:	INVESTIGATION OF STRUCTURE QUALITY USING GEOPHYSICAL METHODS ON CONCRETE AND REINFORCED CONCRETE STRUCTURES
Level:	M.Sc.
Acceptance Date:	27/1/2017
Number of Pages:	133
Registration Number:	i3159

Summary:

Researchers which has worked about determination of structure quality using

geophysical methods are painted a positive picture of big improvements. Nowadays

ground penetrating radar (GPR), electrical resistivity and ultrasonic method have often

been used at structure geophysic research.

Aim of thesis is to investigate effect of geophysical methods which have been used

in structure research. Evaluation of taken measurements by high frequency GPR, ultrasonic

and resistivity tools on reinforced concrete samples, concrete which was especially

prepared and existing structure was done. Estimation of concrete strength from pulse

velocity measurement, degree of corrosion estimated from electrical resistivity

measurements, numbers and depths of reinforcement, from GPR profiles on different

samples of structure were discussed in this study.

Vertical and horizontal reinforced concrete samples and cubic concrete samples were

designed in this work. GPR, resistivity and ultrasonic measurements were taken on vertical

concrete sample. GPR and ultrasonic measurements were taken on horizontal concrete

sample. Ultrasonic and compression tests were done on cubic samples. Furthermore, GPR,

ultrasonic and resistivity methods were applied on existing concrete column. Data found

by gpr method were evaluated by software and steel bars were determined. According to

data collected by electirical resistivity method, corrosion degree of structures were

identifed. Concrete quality found by ultrasonic measurements and detection of fractures

were done and compared with compression test results. In this study, it is understood that

determination of steel bars and pvc pipes, concrete quality, detection of fractures and

degree of corrosion in construction by using geophysical methods can be determined fast,

cheap and non-destructive.

Key Words: Geophysical methods in structure, Ground penetrating radar, Electrical

resistivity, Ultrasonic, Corrosion, Steel bar, Concrete quality and strengt