A Statistical Study On Ready-Mixed Concretes Produced In Eskişehir After The 1999 Earthquake
Öz
In this study the compressive strength results of samples, which have been taken from concrete produced in ready-mixed concrete facilities in the province of Eskişehir and its vicinities after the earthquakes of 19th August and 12th November, have been statistically evaluated. Ready-mixed concrete facilities belonging to three different plants and results of Concrete Laboratory of Osmangazi University Civil Engineering Department have been evaluated separately for the years 1999, 2000 and 2001, and the results have been discussed according to the variability coefficient given by ACI (American Concrete Institution) and criteria of TS 500/1984 Standard with respect to concrete quality. To this extent, concrete compressive strength results of 3910 samples, 1909 of which are for 7 days and 2001 of which are for 28 days, have been evaluated. Average compressive strengths (fcm), standard deviations (σ) and variability coefficients of the samples have been found and the results have been examined with respect to their compliance with TS 500/1984 and ACI criterias. By evaluating the available data we have tried to have an idea about the quality and reliability of concrete produced in Eskişehir after the earthquake.
Anahtar Kelimeler
Ready-mixed concrete facility,compressive strength,standard deviations,variability coefficients
References
- [1] Akman, S., “The importance of concrete quality in the structure”, TMMOB, The Chamber of Civil Engineering, I. International Concrete Congress, Istanbul, May 1989, pp. 6-12. (in Turkish)
- [2] Turkish Code 5893, “Concrete-Classification by compressive strength”, Institute of Turkish Standart, 1988, Ankara. (in Turkish)
- [3] Turkish Code 500, “Requirements for Design and Construction of Reinforced Concrete Structure”, Institute of Turkish Standart, February 1984, Ankara. (in Turkish)
- [4] Arkun, E., “Concrete and its inspection in the Turkish Codes”, TMMOB, The Chamber of Civil Engineering, I. National Concrete Congress, Istanbul, May 1989, pp. 123-138. (in Turkish)
- [5] Bayazıt, M., Oğuz, B.,“Statistics for Engineering”, Published by Birsen Yayınevi, June 1994, 211 p. (in Turkish)
- [6] ACI, “Recommended Practice for Evaluation of Strength Test Results of Concrete”, Committe 214, ACI Manual of Concrete Practice, Part 2.
- [7] Topçu, İ. B., “The control of the concretes quality which have been taken from concrete produced in small and large ready-mixed concrete facilities in the province of Eskişehir”, TMMOB, The Chamber of Civil Engineering, I. National Concrete Congress, Istanbul, May 1989, pp. 189-198. (in Turkish)
- [8] Topçu, İ. B., Uğurlu, A.,“The examination about the Turkish Code 500/2000 Standart for the concrete”, ECAS 2002, International Structure and Earthquake Engineering Symposium, 14 October 2002, METU, Ankara, Turkey, pp. 492-499. (in Turkish)
- [9] Akyüz, S., Uyan, M., “A study about the concrete quality where is Istanbul and environment”, TMMOB, The Chamber of Civil Engineering, I. International Concrete Congress, Istanbul, May 1989, pp. 160-171. (in Turkish)
- [10] Cilason, N., “To proposes about the concrete quality and to improve the inspection”, TMMOB, The Chamber of Civil Engineering, I. National Concrete Congress, 24-26 May 1989, Istanbul, pp. 330-338. (in Turkish)