EFFECTS OF CHEMICAL ADMIXTURES ON SPECIALITIES OF HARDENED CONCRETE USED IN READY CONCRETE PRODUCTION IN ESKÝÞEHÝR

In this study polls were taken from different ready mixed concrete firms in Eskiþehir. Chemical admixtures used in concrete production were investigated according to the polls, and some information about chemical admixtures was obtained. Compressive strengths of concrete specimens manufactured by ready mixed concrete firms were evaluated, and results were investigated due to different types and proportions of admixtures used in concrete. Chemical admixtures were compared to each other at the end of the investigation, and the results showed, chemical admixtures gain concrete different characteristics according to various environmental conditions. The past investigations showed that the differences between chemical admixtures were most occurred owing to environmental conditions (season, temperature etc.), and chemical admixtures were classified according to seasons by users.

ESKÝÞEHÝR’DE HAZIR BETON ÜRETÝMÝNDE KULLANILAN KATKI MADDELERÝNÝN SERTLEÞMÝÞ BETON ÖZELLÝKLERÝNE ETKÝLERÝ

Bu çalýþmada Eskiþehir’de bulunan farklý beton santrallerinde anketler yapýlmýþtýr. Anketler yardýmý ile beton üretiminde kullanýlan kimyasal katkýlar hakkýnda bilgi toplanmýþtýr. Üretilen betonlarýn basýnç dayanýmlarý deðerlendirilerek, betonlarda farklý tür ve miktarlardaki kimyasal katký kullanýmýnýn sonuçlarý incelenmiþtir. Araþtýrmalarýn sonucunda betona ayný özelikleri kazandýrmak için kullanýlan kimyasal katkýlarýn birbiriyle karþýlaþtýrýlmasý yapýlmýþ ve ortam koþullarýna göre betona farklý nitelikler kazandýrdýðý belirlenmiþtir. Yapýlan araþtýrmalar bu deðiþikliklerin en çok ortam koþullarýndan (mevsim, sýcaklýk v.s.) kaynaklandýðýný göstermiþ ve kullanýcýlarý araþtýrýlan katkýlarý mevsimlik kullanýma göre sýnýflandýrmaya yönlendirmiþtir.