Mineral katkı içeren kalsiyum alüminat çimento esaslı harçların mekanik, dayanıklılık, termal ve içyapı özelliklerinin araştırılması
Abstract
Bu çalışmada, kalsiyum alüminat
çimentosunun ağırlıkça %10’u ile %40'ı oranında yüksek fırın cürufu ve uçucu
kül ile kısmi ikame edilmesi sonucu elde edilen kalsiyum alüminat çimento
esaslı harç karışımlarının mekanik, dayanıklılık, termal ve içyapı özellikleri
incelenmiştir. Karışımların basınç ve eğilme dayanımları 3, 7, 28 ve 90.
günlerde belirlenmiştir. Harç karışımları üzerinde sülfat ve asit direnci,
yüksek sıcaklık direnci, termogravimetrik analiz (TGA), bilgisayarlı mikro
tomografi (MicroCT) ve x-ışını foto elektron spektroskopisi (XPS) analizleri
gerçekleştirilmiştir. Kalsiyum alüminat çimentosunun %10 yüksek fırın cürufu ve
%20 uçucu kül ile ikame edilmesi sonucu üretilen harçlar üzerinde basınç
dayanımı, yüksek sıcaklık direnci ve dayanıklılık deney sonuçları kontrol
karışımı ile karşılaştırılmıştır. Mineral katkı ilavesi nedeniyle karışımların
gözenek yapısında değişiklikler olmasına rağmen, karışımların kimyasal
özelliklerinde önemli bir değişiklik gözlemlenmemiştir. Deney sonuçları, yüksek
fırın cürufunun ve uçucu külün kalsiyum alüminat çimentosu yerine kısmen
kullanılması ile ekolojik verimli ve uygun maliyetli bir bağlayıcı yapı
malzemesi üretebileceğini göstermektedir.
Keywords
Kalsiyum alüminat çimentosu yüksek fırın cürufu uçucu kül mekanik dayanıklılık termal içyapı
References
- Scrivener K.L., Capmas A., ''Calcium Aluminate Cements, Chapter 13, in: P.C. Hewlett (Ed.), Lea’s Chemistry of Cement and Concrete'', John Wiley & Sons, New York, (1998).
- Barnes P., Bensted J., ''Structure and Performance of Cements'', CRC Press, Boca Raton, (2002).
- Scrivener K.L, Cabiron J.L., Letourneux R., ''High-performance concretes from calcium aluminate cements'', Cement and Concrete Research, 29: 1215-1223, (1999).
- Pöllmann H., ''Calcium Aluminate Cements – Raw Materials, Differences, Hydration and Properties'', Reviews in Mineralogy and Geochemistry, 74(1): 1-82, (2012).
- Edmonds R.N., Majumdar A.J., ''The hydration of monocalcium aluminate at different temperatures'', Cement and Concrete Research, 18: 311-320, (1998).
- Ukrainczyk N., ''Kinetic modeling of calcium aluminate cement hydration'', Chemical Engineering Science, 65: 5605-5614, (2010).
- Pyatina T., Sugama T., ''Acid resistance of calcium aluminate cement-fly ash F blends'', Advances in Cement Research, 28(7), 433-457, (2016).
- Sucu M., Delibaş T., ''Kalsiyum Alüminat Çimentosu Bazlı Tamir Harçları'', Türkiye Hazır Beton Birliği, Hazır Beton Dergisi, 88-94, (2015).
- Lothenbach B., Scrivener K.L., Hooton R.D., ''Supplementary cementitious materials'', Cement and Concrete Research, 41, 1244-1256, (2011).
- Juenger M.C.G., Siddique R., ''Recent advances in understanding the role of supplementary cementitious materials in concrete'', Cement and Concrete Research, 78, 71-80, (2015).
- TS EN 196-1, ''Çimento deney metotları - Bölüm 1: Dayanım tayini'', Türk Standartları Enstitüsü, Ankara, (2016).
- ASTM C1012, ''Standard test method for length change of hydraulic-cement mortars exposed to a sulfate solution'', Annual Book of ASTM Standard, USA, (2015).
- ASTM C 279, ''Standard Specification for Chemical-Resistant Masonry Units'' Annual Book of ASTM Standard, USA, (2017).
- Mehta P.K., Monteiro P.J.M., ''Concrete Microstructure, Properties and Materials'', McGraw-Hill, 659p, (2006).
- Neville A.M., ''Properties of Concrete'', Longman Group Limited, London, (2011).
- Cohen M.D., Bentur A., ''Durability of Portland cement-silica fume pastes in magnesium sulfate and sodium sulfate solutions'' ACI Materials Journal, 85(3), 148-157, (1988).
- George C., ''Industrial aluminous cements. Structure and performance of cements''. P. Barnes, London, Applied Science Publishers, 415-470, (1983).
Investigation of mechanical, durability, thermal and microstructural properties of calcium aluminate cement based mortars containing mineral admixtures
Abstract
In this study, mechanical, durability, thermal and
microstructural properties of calcium aluminate cement-based mortar mixtures
incorporating 10% to 40% partial replacement by weight of blast furnace slag
and fly ash were investigated. Compressive and flexural strength tests were
performed at 3, 7, 28 and 90 days. Sulfate and acid resistance, high
temperature resistance, thermo-gravimetric analysis (TGA), micro-tomography
(MicroCT) and x-ray photo electron spectroscopy (XPS) analyses were also
performed on the mortar mixtures. The compressive strength, high temperature
resistance and durability test results on mortars incorporating 10% blast
furnace slag and 20% fly ash partial replacement for calcium aluminate cement
were comparable to that of the control mixture. Although there were changes in
pore structure due to mineral admixture addition, no significant change was
observed in the chemical properties of the mixtures. Results indicate that
blast furnace slag and fly ash partial replacement for calcium aluminate cement
can produce an eco-efficient and cost-effective binder.
Keywords
Calcium aluminate cement ground granulated blast furnace slag fly ash mechanical durability thermal microstructure
References
- Scrivener K.L., Capmas A., ''Calcium Aluminate Cements, Chapter 13, in: P.C. Hewlett (Ed.), Lea’s Chemistry of Cement and Concrete'', John Wiley & Sons, New York, (1998).
- Barnes P., Bensted J., ''Structure and Performance of Cements'', CRC Press, Boca Raton, (2002).
- Scrivener K.L, Cabiron J.L., Letourneux R., ''High-performance concretes from calcium aluminate cements'', Cement and Concrete Research, 29: 1215-1223, (1999).
- Pöllmann H., ''Calcium Aluminate Cements – Raw Materials, Differences, Hydration and Properties'', Reviews in Mineralogy and Geochemistry, 74(1): 1-82, (2012).
- Edmonds R.N., Majumdar A.J., ''The hydration of monocalcium aluminate at different temperatures'', Cement and Concrete Research, 18: 311-320, (1998).
- Ukrainczyk N., ''Kinetic modeling of calcium aluminate cement hydration'', Chemical Engineering Science, 65: 5605-5614, (2010).
- Pyatina T., Sugama T., ''Acid resistance of calcium aluminate cement-fly ash F blends'', Advances in Cement Research, 28(7), 433-457, (2016).
- Sucu M., Delibaş T., ''Kalsiyum Alüminat Çimentosu Bazlı Tamir Harçları'', Türkiye Hazır Beton Birliği, Hazır Beton Dergisi, 88-94, (2015).
- Lothenbach B., Scrivener K.L., Hooton R.D., ''Supplementary cementitious materials'', Cement and Concrete Research, 41, 1244-1256, (2011).
- Juenger M.C.G., Siddique R., ''Recent advances in understanding the role of supplementary cementitious materials in concrete'', Cement and Concrete Research, 78, 71-80, (2015).
- TS EN 196-1, ''Çimento deney metotları - Bölüm 1: Dayanım tayini'', Türk Standartları Enstitüsü, Ankara, (2016).
- ASTM C1012, ''Standard test method for length change of hydraulic-cement mortars exposed to a sulfate solution'', Annual Book of ASTM Standard, USA, (2015).
- ASTM C 279, ''Standard Specification for Chemical-Resistant Masonry Units'' Annual Book of ASTM Standard, USA, (2017).
- Mehta P.K., Monteiro P.J.M., ''Concrete Microstructure, Properties and Materials'', McGraw-Hill, 659p, (2006).
- Neville A.M., ''Properties of Concrete'', Longman Group Limited, London, (2011).
- Cohen M.D., Bentur A., ''Durability of Portland cement-silica fume pastes in magnesium sulfate and sodium sulfate solutions'' ACI Materials Journal, 85(3), 148-157, (1988).
- George C., ''Industrial aluminous cements. Structure and performance of cements''. P. Barnes, London, Applied Science Publishers, 415-470, (1983).
Details
| Primary Language | Turkish |
|---|---|
| Subjects | Engineering |
| Journal Section | Research Article |
| Authors | |
| Publication Date | June 1, 2020 |
| Submission Date | November 15, 2018 |
| Published in Issue | Year 2020 Volume: 23 Issue: 2 |
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