Ultra-ductile behavior of fly ash-based engineered geopolymer composites with a tensile strain capacity up to 13.7%

Nguyễn, Huy Hoàng; Lương, Quang-Hiếu; Choi, Jeong-Il; Ranade, Ravi; Li, Victor C.; Lee, Bang Yeon

doi:10.1016/j.cemconcomp.2021.104133

Cited by 58 publications

(12 citation statements)

References 38 publications

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“…For instance, Ling et al (2019) developed a FA/GGBS-based EGC with high compressive strength of up to 102 MPa but achieved a relatively low tensile ductility of only 1.0%. On the other hand, Nguyen et al (2021) developed an ultra-ductile FA-based EGC with a tensile strain capacity of up to 13.7% but with low compressive strength, around 20 MPa. This observation was also shown in our mixtures added with QP.…”

Section: Discussion Of Resultsmentioning

confidence: 99%

Characterisation of “One-part” Ambient Cured Engineered Geopolymer Composites

Teo

Shirai

Lim

2023

ACT

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Engineered geopolymer composites (EGC) recently emerged as a promising alternative to resolve traditional concrete's CO 2 emission and brittleness. It features a cementless-based solution and possesses pseudo-strain-hardening (PSH) behaviour with high tensile ductility. There are two main obstacles associated with the use of geopolymer: firstly, the handling of user-hostile alkaline solutions and secondly, the necessity of heat curing. This paper aims to summarize the findings on the development and characterization of an ambient cured "one-part" EGC under the influence of various parameters, namely binder proportion between fly ash (FA) and ground granulated blast furnace slag (GGBS), quartz powder/binder ratio, alkali activator/binder ratio and water/binder ratio. Fresh and mechanical properties consisting of compressive strength, uniaxial tensile performance, and microstructure analysis were conducted. The results obtained indicate that increased FA content favours the attainment of PSH behaviour of the composite due to low matrix fracture toughness and fibre-matrix interfacial bond strength. Low water content and increased alkali activator content would greatly enhance the matrix toughness and fibre-matrix interfacial bond strength. The addition of quartz powder may favour strength attainment, but excessive quantities may have unfavourable consequences on the PSH behaviour.

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Section: Discussion Of Resultsmentioning

confidence: 99%

Characterisation of “One-part” Ambient Cured Engineered Geopolymer Composites

Teo

Shirai

Lim

2023

ACT

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“…EGC is one of the types of special concrete for which standards have not been prescribed, and since it is in the initial phases of development, several advanced studies are being carried out worldwide [ 37 , 38 ]. The available literature on the development of EGC is quite limited such that performing future studies on EGC requires more trials since assumptions cannot be made for any aspects.…”

Section: Research Significancementioning

confidence: 99%

“…The literature based on the material studies of engineered geopolymer composites (EGC) was collected. In total, 14 studies [ 38 , 39 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 ] were selected as per the criteria mentioned in Table 1 and the database was framed. A total of 72 datasets were collected from the carefully selected 14 studies with the aforesaid mix-influencing factors.…”

Section: Databasementioning

confidence: 99%

Artificial Neural Network with a Cross-Validation Technique to Predict the Material Design of Eco-Friendly Engineered Geopolymer Composites

et al. 2022

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A material-tailored special concrete composite that uses a synthetic fiber to make the concrete ductile and imposes strain-hardening characteristics with eco-friendly ingredients is known as an “engineered geopolymer composite (EGC)”. Mix design of special concrete is always tedious, particularly without standards. Researchers used several artificial intelligence tools to analyze and design the special concrete. This paper attempts to design the material EGC through an artificial neural network with a cross-validation technique to achieve the desired compressive and tensile strength. A database was formulated with seven mix-design influencing factors collected from the literature. The five best artificial neural network (ANN) models were trained and analyzed. A gradient descent momentum and adaptive learning rate backpropagation (GDX)–based ANN was developed to cross-validate those five best models. Upon regression analysis, ANN [2:16:16:7] model performed best, with 74% accuracy, whereas ANN [2:16:25:7] performed best in cross-validation, with 80% accuracy. The best individual outputs were “tacked-together” from the best five ANN models and were also analyzed, achieving accuracy up to 88%. It is suggested that when these seven mix-design influencing factors are involved, then ANN [2:16: 25:7] can be used to predict the mix which can be cross-verified with GDX-ANN [7:14:2] to ensure accuracy and, due to the few mix trials required, help design the SHGC with lower costs, less time, and fewer materials.

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“…Nguyen vd. [18], aktivatörlerin geopolimerik matris üzerinde etkilerini araştırmanın yanı sıra, %13.7 maksimum çekme gerilmesi ile ultra sünek EGC'yi geliştirmişlerdir. EGC'nin eğilme ve çekme davranışlarını inceleyen Trindade vd.…”

Section: Introductionunclassified

M45-ECC ve uçucu kül+cüruf esaslı tasarlanmış geopolimer kompozitlerin mekanik ve mikroyapısal özellikleri

Öz¹,

Güneş

2023

NÖHÜ Müh. Bilim. Derg.

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

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Ultra-ductile behavior of fly ash-based engineered geopolymer composites with a tensile strain capacity up to 13.7%

Cited by 58 publications

References 38 publications

Characterisation of “One-part” Ambient Cured Engineered Geopolymer Composites

Characterisation of “One-part” Ambient Cured Engineered Geopolymer Composites

Artificial Neural Network with a Cross-Validation Technique to Predict the Material Design of Eco-Friendly Engineered Geopolymer Composites

M45-ECC ve uçucu kül+cüruf esaslı tasarlanmış geopolimer kompozitlerin mekanik ve mikroyapısal özellikleri

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