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Journals / Niğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi / 2023 / Cilt: 12 - Sayı: 1

Effect of fine pumice aggregate on performance of cement based self-leveling screed

İnce pomza agreganın çimento esaslı kendiliğinden yayılan tesviye şapının performansına etkisi

Lütfullah GÜNDÜZ
Şevket Onur KALKAN
Pages
225–238
Publication Date
2023-01-15
DOI
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AI Summary & Key Takeaways

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

According to the results of the study, the flowability property of the mortars decreases as the amount of pumice entering the mixture increases.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Screeds are building materials used to fix surface defects and bevel floors.
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Key Findings & Data:In this study, self-compacting and lightweight screeds with a density value of 1080 – 1156 kg/m3 were produced.
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Conclusion & Impact:According to the results of the study, the flowability property of the mortars decreases as the amount of pumice entering the mixture increases.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Pomza agrega · Çimento · Kendiliğinden yayılan

Abstract

Screeds are building materials used to fix surface defects and bevel floors. Conventional cementitious screeds require extra labor to level the surface and create an extra dead load in buildings as they are produced using normal weight aggregates. In this study, self-compacting and lightweight screeds with a density value of 1080 – 1156 kg/m3 were produced. In the produced composite mortars, pumice in two different sizes was used as the main aggregate and melamine sulfonate-based superplasticizer was used to provide self-leveling. Within the scope of the study, flowability, density, porosity, 1, 7, 28 and 120 days compressive and flexural strength, abrasion resistance, surface hardness and shrinkage and expansion properties of composite mortars were determined. According to the results of the study, the flowability property of the mortars decreases as the amount of pumice entering the mixture increases. Similarly, as the amount of pumice increases, the porosity of the mortar increases, the unit volume mass decreases, and accordingly its mechanical performance decreases.

Özet

Şaplar, yüzey kusurlarını düzeltmek ve zeminlere eğim vermek için kullanılan yapı malzemeleridir. Konvansiyonel çimento esaslı şaplar, yüzey düzlemek için fazladan işçilik gerektirmekte ve normal yoğunluklu agregalar kullanılarak üretildiği için binalarda fazladan ölü yük oluşturmaktadır. Bu çalışmada, 1080 – 1156 kg/m3 yoğunluk değerlerinde oldukça hafif ve kendiliğinden yerleşme özelliği iyileştirilmiş şap harçları üretilmiştir. Üretilen kompozit harçlarda ana agrega olarak iki farklı boyutta pomza ve kendiliğinden yayılmayı sağlamak için melamin sülfonat esaslı süper akışkanlaştırıcı kullanılmıştır. Çalışma kapsamında kompozit harçların yayılma, yoğunluk, gözeneklilik, 1, 7, 28 ve 120 günlük basınç ve eğilme dayanımı, aşınma direnci, yüzey sertliği, negatif rötre ve pozitif rötre özellikleri belirlenmiştir. Çalışma sonuçlarına göre, karışıma giren pomza miktarı arttıkça harçların yayılma özelliği azalmaktadır. Benzer şekilde pomza miktarı arttıkça harcın gözenekliliği artmakta, birim hacim kütlesi azalmakta, buna bağlı olarak da mekanik performansı azalmaktadır.

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Cite This Article

GÜNDÜZ, L., KALKAN, Ş. O. (2023). Effect of fine pumice aggregate on performance of cement based self-leveling screed. Niğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi, Cilt: 12 - Sayı: 1, 225–238. https://ajindex.com/articles/877063

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