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Journals / Balıkesir Üniversitesi Fen Bilimleri Enstitüsü Dergisi / 2018 / Cilt: 20 - Sayı: 1

Comparison of different pozzolans from strength and permeability performance of mortar mixtures containing plain, binary and ternary cementitious systems view point

Farklı puzolanların tekli, ikili ve üçlü çimentolu sistemleri içeren harç karışımlarının dayanımı ve geçirgenlik performansı açısından kıyaslanması

Ali MARDANI-AGHABAGLOU
Süleyman ÖZEN
Sultan Husein BAYQRA
Hassane Amidou OUEDRAOGO
Pages
612–625
Publication Date
2018-05-14
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

However, after 28 days, the mixture containing both metakaolin and silica fume with ternary cementitious system showed the most successful results.

📌 3 Key Takeaways

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Objective & Hypothesis:In this study, the effect of silica fume and metakaolin on the strength, transport properties and ultrasonic pulse velocity of the mortar mixtures containing plain, binary and ternary cementitious systems were investigated comparatively.
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Key Findings & Data:In the first and second series mixture, metakaolin and silica fume were used as 7.5wt% of the cement, respectively.
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Conclusion & Impact:However, after 28 days, the mixture containing both metakaolin and silica fume with ternary cementitious system showed the most successful results.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Metakaolin · silica fume · mortar mixture

Abstract

In this study, the effect of silica fume and metakaolin on the strength, transport properties and ultrasonic pulse velocity of the mortar mixtures containing plain, binary and ternary cementitious systems were investigated comparatively. For this purpose, in addition to the control mixture containing no mineral admixture, three series of mixtures were produced by replacing silica fume and metakaolin with cement in different ratios. In the first and second series mixture, metakaolin and silica fume were used as 7.5wt% of the cement, respectively. In the third series, a mixture containing 15% of mineral admixture was prepared by replacing both silica fume and metakaolin with 7.5wt% of cement. In the all of mixture, the water/cement ratio, sand/binder ratio and flow values were kept constant. Water reducing admixture was used in different ratio for providing the desired flow values. The time-dependent flow value, compressive and flexural strengths, water absorption capacity and ultrasonic pulse velocity of the mixtures were determined. According to the test results, irrespective of utilization of mineral admixture, the time-dependent flow value, strength, permeability and ultrasonic pulse velocity of the mixtures were positively affected by using admixture. This effect was more pronounced by elapsing time. In the early ages, the metakaolin-bearing mixture with binary cementitious system showed better performance compare to the other mixtures. However, after 28 days, the mixture containing both metakaolin and silica fume with ternary cementitious system showed the most successful results.

Özet

Bu çalışmada silis dumanı ve metakaolin kullanımının tekli, ikili ve üçlü çimentolu sistemleri içeren harç karışımlarının dayanımına, geçirgenlik özelliğine ve ultra ses geçiş hızına etkisi kıyaslamalı olarak incelenmiştir. Bu amaçla mineral katkı içermeyen kontrol karışımına ilaveten farklı oranlarda silis dumanı ve metakaolin çimento ile yer değiştirerek 3 seri karışım daha yapılmıştır. 1. ve 2. seride çimentonun %7,5’u ile ağırlıkça metakaolin ve silis dumanı yer değiştirmiştir. 3. seride ise çimentonun %7,5’u kadar hem metakaolin hem de silis dumanı kullanılarak toplamda %15 mineral katkı içeren karışım hazırlanmıştır. Tüm karışımlarda su/çimento oranı, kum/bağlayıcı oranı ve yayılma değeri sabit tutulmuştur. İstenilen yayılma değerini sağlamak için farklı oranlarda tek tip su azaltıcı katkı kullanılmıştır. Karışımların zamana bağlı yayılma değerleri, basınç ve eğilme dayanımları, su emme kapasiteleri ve ultra ses geçiş hızları belirlenmiştir. Deney sonuçlarına göre mineral katkı türünden bağımsız olarak mineral katkı kullanımı ile karışımların zamana bağlı yayılma, dayanım, geçirgenlik ve ultra ses geçiş hızı değerleri olumlu etkilenmiştir. Bu etki zamanla daha belirgin hale gelmiştir. İkili çimentolu sisteme sahip metakaolin içeren karışım erken yaşlarda diğer karışımlara göre daha iyi performans göstermiştir. Ancak 28 günden sonra hem metakaolin hem de silis dumanı içeren üçlü çimentolu sisteme sahip karışım en başarılı sonucu göstermiştir.

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Cite This Article

MARDANI-AGHABAGLOU, A., ÖZEN, S., BAYQRA, S. H., OUEDRAOGO, H. A. (2018). Comparison of different pozzolans from strength and permeability performance of mortar mixtures containing plain, binary and ternary cementitious systems view point. Balıkesir Üniversitesi Fen Bilimleri Enstitüsü Dergisi, Cilt: 20 - Sayı: 1, 612–625. https://ajindex.com/articles/251059

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