Karşılaştırmalı Bir Çalışma: Analsim ve Klinoptilolit İçeren Katkılı Çimentolar

Year 2019, Volume: 23 Issue: 3, 748 - 758, 25.12.2019

Yasemin Akgün

https://doi.org/10.19113/sdufenbed.457171

Cited By: 1

Abstract

Temiz çevre ve enerji tasarrufu nedeniyle katkılı
çimentolara olan talep, giderek yaygınlaşmaktadır. Gelecekte, bu talep
piyasadaki katkı maddeleri tarafından karşılanamayacaktır. Bu nedenle,
alternatif katkı maddelerine her zaman ihtiyaç duyulacaktır. Bu çalışmanın
amacı, sürdürülebilir katkılı çimento üretiminde kullanılan katkı çeşitliliğine
bir katkı sağlamaktır. Bu nedenle, bu çalışmada, katkılı çimento üretimlerinde
yaygın olarak kullanılan doğal zeolit ​​tipi klinoptilolit (K) ve farklı doğal
zeolit ​​tipi analsim (A) karşılaştırılmıştır. Bu zeolitler volkanik tüf
kökenli doğal puzolandırlar. Öncelikle, zeolitlerin puzolanik aktiviteleri,
mineralojik yapıları, fiziksel ve kimyasal özellikleri belirlendi. Ardından
Portland çimentosu (PC) ve doğal zeolit katkılı çimentolar kullanılarak
hazırlanan numuneler üzerinde hidratasyon ısısı, priz süreleri ve basınç
dayanımı testleri gerçekleştirildi. Test numunelerinde kullanılan zeolitlerin
yer değiştirme oranları Portland çimentosu ağırlığının 0, 10, 30 ve %50’ sidir.
Puzolanik aktivite testlerinin sonuçlarına göre, kireç-zeolit (puzolan)
karışımlarının basınç dayanımları analsim için 6.30 MPa ve klinoptilolit için
9.02 MPa olarak belirlendi. Analsim içeren katkılı çimentoların hidratasyon
ısıları, tüm yer değiştirme oranlarında, klinoptilolit içeren katkılı
çimentolardan ve Portland çimentosundan daha düşüktür. Analsim içeren katkılı
çimentoların priz süreleri klinoptilolit içeren katkılı çimentolardan ve
Portland çimentosundan daha kısa olarak belirlendi. Analsim katkılı çimentolar
içeren harçların basınç dayanımı, klinoptilolit katkılı çimentolar içeren
harçlardan biraz daha yüksektir. Her iki zeolit ​​karışımlı çimento içeren
harçların optimum dayanım değerleri %10 yer değiştirme oranında elde
edilmiştir. Çalışmadan elde edilen sonuçlara göre, analsim klinoptilolite
benzer özellikler sergilemektedir. Bazı durumlarda, bu benzer özelliklerden
dolayı, analsim çimento endüstrisinde yaygın olarak kullanılan klinoptilolite
alternatif bir katkı maddesi olabilir.

Keywords

Analsim, Klinoptilolit, Hidratasyon Isısı, Priz Süreleri, Dayanım, Zeolit

A Comparative Study: Blended Cements Containing Analcime and Clinoptilolite

Abstract

The demand to blended cements is increasingly
widespread due to clean environment and energy saving. In the future, this
demand will not be met by currently additives on the market. For this reason,
alternative additives will always be needed. The aim of this study is to
provide a contribution for additive variety used in sustainable blended cement
productions. Therefore, in this study, natural zeolite type clinoptilolite (C)
which is widely used in blended cement production and different natural zeolite
type analcime (A) are compared. These zeolites are natural pozzolans with
volcanic tuff origin. Firstly, pozzolanic activities, mineralogical structures,
physical and chemical properties of zeolites were determined. And then, the
heat of hydration, setting times and compressive strength tests were performed
on samples prepared by using Portland cement (PC) and natural zeolite blended
cements. The replacement ratios of zeolites used in test samples are 0, 10, 30
and 50% of Portland cement weight. According to results of pozzolanic activity
tests, the compressive strengths of lime-zeolite (pozzolan) mixtures were
determined as 6.30MPa for analcime and 9.02MPa for clinoptilolite.  The heats of hydration of blended cements containing
analcime were lower than that of blended cements containing clinoptiloite and
that of Portland cement at all replacement ratios. The setting times of blended
cements containing analcime were determined as shorter than that of blended
cements containing clinoptiloite and that of Portland cement. The compressive
strengths of mortars containing analcime blended cements were slightly higher
than that of mortars containing clinoptilolite blended cements. The optimum
strength values of mortars containing both zeolite blended cements were obtained
at 10% replacement ratio. According to the results obtained from the study,
analcime exhibits similar properties to clinoptilolite. In some cases, due to
these similar properties, analcime may be an alternative additive to
clinoptilolite which is widely used in blended cement industry.

Keywords

Analcime, Clinoptilolite, Heat of hydration, Setting times, Strength, Zeolite

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