Assessment of concrete strength by lok and capo tests

(1990) Assessment of concrete strength by lok and capo tests. Masters thesis, King Fahd University of Petroleum and Minerals.


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English Abstract

It is recognized that strength of concrete in structures is different than strength of control specimens, therefore an increased demand for more precise and more practical methods of in-situ assessment of concrete quality had led to the development of a large variety of techniques to evaluate concrete properties, such as strength, durability and quality control. Pullout testing of concrete is one of these techniques which divides into two basic categories; the first one has an insert which is cast into the concrete (lok-test), the other has an insert fixed into a hole drilled into the hardened concrete (capo-test). The purpose of this study is to verify the accuracy and reliability of lok-test and capo-test methods for estimation of in-situ compressive strength of concrete made with commonly used local materials, and to develop the necessary calibration curves between pullout force and standard compressive strength for various types of aggregates, cement contents and water cement ratios. Based on a regression analysis of the generated data, effects of the previous variables on the behavior of strength have been studied and the calibration curves developed. The proposed models have been verified for their reliability by comparing predicted strength with the actual strength.

Item Type: Thesis (Masters)
Subjects: Civil Engineering
Department: College of Design and Built Environment > Civil and Environmental Engineering
Committee Advisor: Basunbul, I. A.
Committee Members: Al-Sulaimani, Ghazi Jameel and Ahmed, Munir
Depositing User: Mr. Admin Admin
Date Deposited: 22 Jun 2008 13:49
Last Modified: 01 Nov 2019 13:51