Tasarlanmış çimento esaslı kompozit ile uçucu kül ve cüruf esaslı tasarlanmış geopolimer kompozitlerin mekanik ve mikroyapısal özellikleri

Year 2023, , 452 - 471, 15.04.2023

Hatice Öznur Öz , Muhammet Güneş

https://doi.org/10.28948/ngumuh.1186020

Abstract

Bu çalışmada, literatürde M45 kodu ile bilinen standart tasarlanmış çimento esaslı kompozite (ECC) benzer taşıma gücü ve deformasyon kapasitesine sahip bir uçucu kül+yüksek fırın cürufu (UK+YFC) esaslı tasarlanmış geopolimer kompozit (EGC) karışımının geliştirilmesi amaçlanmıştır. Bu amaçla ECC’nin yanı sıra farklı oranlarda UK ve YFC içeren iki farklı EGC karışımı geliştirilmiştir. Üretilen bu üç karışımın taze ve reolojik özelliklerinin yanı sıra basınç dayanımı, elastisite modülü, hava kurusu birim hacim ağırlığı, yapısal verimliliği, ultrasonik titreşim hızı (UTH), kırılma tokluğu ve eğilme performansı 7. ve 28. günlerde belirlenmiştir. Sonuçta, ECC’den çok daha yüksek basınç dayanımına ve sünekliğe sahip bir EGC karışımı elde edilmiştir. Ayrıca, artan YFC içeriğinin mekanik dayanımı ve tokluğu artırdığı ancak, sünekliği azalttığı tespit edimiştir. Bu durumun nedenleri XRD, TGA/DTA ve FTIR analizleri ile mikroyapısal olarak araştırılmıştır.

Keywords

EGC, Uçucu kül, Cüruf, Mekanik ve mikroyapısal özellikler, ECC

Supporting Institution

Niğde Ömer Halisdemir Üniversitesi Bilimsel Araştırma Projeleri Koordinasyon Birimi

Project Number

MMT 2021/2-BAGEP

Thanks

Bu çalışma Niğde Ömer Halisdemir Üniversitesi Bilimsel Araştırma Projeleri Koordinasyon Birimi tarafından MMT 2021/2-BAGEP no’lu ve ‘‘Sentetik Vollastonit İçeren Tasarlanmış Geopolimer Kompozitlerin Taze, Mekanik, Durabilite ve Boyutsal Stabilite Özellikleri’’ başlıklı proje ile desteklenmiştir.

Mechanical and microstructural properties of engineered cementitious composite with fly ash and slag-based engineered geopolymer composites

Abstract

In this study, it was aimed to develop a fly ash+blast furnace slag (FA+BFS)-based engineered geopolymer composite (EGC) mixture having similar bearing strength and deformation capacity to the standard engineered cementitious composite (ECC) known with the M45 code in the literature. For this purpose, in addition to ECC, two different EGC mixtures incorporating different ratios of FA and BFS were produced. The compressive strength, modulus of elasticity, air dry unit volume weight, structural efficiency, ultrasonic pulse velocity (UPV), fracture toughness and flexural performance were determined on the 7th and 28th day as well as the fresh and rheological properties of these three mixtures. Finally, an EGC mixture having much higher compressive strength and ductility was obtained than that of ECC. Moreover, it was determined that increasing amount of BFS improved mechanical strength and toughness, but decreased ductility. The reasons of these situations were investigated microstructurally by XRD, TGA/DTA and FTIR analyzes.

Keywords

ECC, EGC, Fly ash, Slag, Mechanical and microstructural properties

Project Number

MMT 2021/2-BAGEP

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