Polinaftalin sülfonat esaslý süperakýþkanlaþtýcýlarýn farklý inceliklere sahip Bayburt Taþý ikame edilmiþ kompoze çimentolarýn mekanik ve fiziksel özelliklerine etkisi

Bu çalýþmada, puzolanik özelliðe sahip 45 µm ve 125 µm incelikte öðütülmüþ Bayburt taþý PÇ 42.5R (CEM I) çimentoda sýrasýyla aðýrlýkça %0, 10, 20 ve %30 ikame edilmiþtir. Çalýþmanýn amacý iki aþamada oluþturuldu: birincisi farklý inceliklere sahip zeolit içeren Bayburt taþý atýklarýnýn CEM I tip çimentoya ikame edildikten sonra elde edilen çimentonun basýnç dayanýmý ve fiziksel özelliklerine etkilerini deðerlendirmek, diðeri üretilen çimentolarýn farklý firmalara ait ayný tip süperakýþkanlaþtýrýcýlarla davranýþýný incelemektir. Hazýrlanan hamur numuneler üzerinde standart kývam, priz süreleri ve hacim sabitliði gibi standart çimento deneyleri, harç numuneler üzerinde yayýlma ve basýnç dayanýmý deneyleri gerçekleþtirilmiþtir. Harç numuneler 28 gün standart küre býrakýlmýþ ve ardýndan 2, 7 ve 28 gün yaþlarýnda basýnç dayanýmý deneyi yapýlmýþtýr. Sonuç olarak özgül yüzeye baðlý olarak deðiþen incelik fiziksel, mekanik ve reolojik özellikleri önemli derecede etkilemiþtir. Bu çalýþmada farklý firmalara ait polinaftalin sülfonat tipi süperakýþkanlaþtýrýcýlarýn beyaz Bayburt taþý ikameli çimentolarda kullanýlabileceði belirlenmiþtir.

Effect of the polynaphtalene sulfonate based superplasticizer on mechanichal and physical properties of blended cement repaced by Bayburt Stone with different fineness

In this study, grinded Bayburt Stone has pozzolanic property with 45 µm and 125 µm fineness was replaced with PC 42.5R (CEM-I) type cement at ratio of 0%, 10%, 20%, and 30% by weight. The aim of this study was made up in two phase, one of them was to investigate the effects of Bayburt Stone waste contain zeolite with different fineness on physical and mechanical properties of composite cements and the other one was to investigate behavior of same superplasticizer belong to two different company. Standard consistency, setting time and volume expansion tests are performed on the cement pastes and compression strength and flow tests are performed on the cement mortars. Mortar specimens are kept in standard curing for 28 days, than compressive strength test are performed at the ages of 2, 7 and 28 days. As a result, changes in specific surface area depending on the particle size distribution of mineral additives makes significant different on the physical, mechanical and rheological properties of cement mortars. In this study, it was determined that same type of superplasticizers which had different companies could be used in blended cement replaced with Bayburt stone.