Influence of fiber characteristics on sulfate resistance of <scp>ambient‐cured</scp> geopolymer concrete

Kantarcı, Fatih

doi:10.1002/suco.202100540

Cited by 10 publications

(3 citation statements)

References 74 publications

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“…9,10 GC outperforms portland cement concrete (PCC) in terms of mechanical and durability properties. [11][12][13] There are many factors that affect the properties of GC such as the volume of aggregate in the total volume of concrete, the type of alkaline solutions and mixing ratios. 14,15 Atis ȩt al.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of fly ash and ground granulated blast furnace slag‐based geopolymer concrete: A comparative study

Yilmazoglu

Yıldırım

Behçet

et al. 2022

Structural Concrete

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Nowadays, geopolymers, which are more environmentally friendly than cement due to the high energy requirements and high carbon dioxide (CO 2 ) emissions of cement production, emerge as alternative binders. In this study, the mechanical and durability properties of geopolymer concrete (GC) based on ground granulated blast furnace slag (GGBS) (100GGBS), 50% fly ash (FA) and 50% GGBS (50FA50GGBS), and FA (100FA) with two different water/geopolymer solids ratios (W/GP) of 0.33 and 0.35 were investigated. Slump, compressive strength, splitting tensile strength, unit weight, water absorption, elevated temperature resistance, abrasion resistance, modulus of elasticity, and drying shrinkage tests were carried out. As the percentage of FA in the mixture increased, the slump of the concrete increased, while the cohesion of the concrete decreased and the setting time was delayed. The addition of GGBS increased the compressive strength and the splitting tensile strength of the GC by up to 377% and 278%, respectively. Under the effect of elevated temperature, the 100FA concrete showed less strength loss and weight loss than other concrete. After the abrasion test, 100GGBS concrete lost about 2.5 times less weight than 100FA concrete. The drying shrinkage of geopolymer mortar reached a maximum of 100 microstrains. Among all concrete, 50FA50GGBS-0.33 showed the highest performance in terms of overall performance.

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Section: Introductionmentioning

confidence: 99%

Performance evaluation of fly ash and ground granulated blast furnace slag‐based geopolymer concrete: A comparative study

Yilmazoglu

Yıldırım

Behçet

et al. 2022

Structural Concrete

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“…Polypropylene fibers are reported to improve the mechanical properties, sulfate resistance, and post-cracking behavior and increase the yield stress of geopolymer concrete, i.e., improvement in the mechanical and durability-related properties and their low cost combined with thermal stability, easy dispersal, and chemical inertness in alkaline environments make them suitable for use in concrete [34][35][36]. Hence, the combination of polypropylene fibers with higher percentages of GGBS might result in better compressive and flexural strengths, and related studies can be made in this field.…”

Section: Introductionmentioning

confidence: 99%

Development of GGBS-Based Geopolymer Concrete Incorporated with Polypropylene Fibers as Sustainable Materials

Thakur

Singh

et al. 2022

Sustainability

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Geopolymer concrete, because of its less embodied energy as compared to conventional cement concrete, has paved the way for achieving sustainable development goals. In this study, an effort was made to optimize its quality characteristics or responses, namely, workability, and the compressive and flexural strengths of Ground Granulated Blast-furnace Slag (GGBS)-based geopolymer concrete incorporated with polypropylene (PP) fibers by Taguchi’s method. A three-factor and three-level design of experiments was adopted with the three factors and their corresponding levels as alkali ratio (NaOH:Na2SiO3) (1:1.5 (8 M NaOH); 1:2 (10 M NaOH); 1:2.5 (12 M NaOH)), percentage of GGBS (80%, 90%, and 100%) and PP fibers (1.5%, 2%, and 2.5%). M25 was taken as the control mix for gauging and comparing the results. Nine mixes were obtained using an L9 orthogonal array, and an analysis was performed. The analysis revealed the optimum levels as 1:2 (10 molar) alkali ratio, 80% GGBS, and 2% PP fibers for workability; 1:2 (10 molar) alkali ratio, 80% GGBS, and 2.5% PP fibers for compressive strength; and 1:2 (10 molar) alkali ratio, 80% GGBS, and 1.5% PP fibers for flexural strength. The percentage of GGBS was found to be the most effective parameter for all three responses. The analysis also revealed the ranks of all the factors in terms of significance in determining the three responses. ANOVA conducted on the results validated the reliability of the results obtained by Taguchi’s method. The optimized results were further verified by confirmation tests. The confirmation tests revealed the compressive and flexural strengths to be quite close to the strengths of the control mix. Thus, optimum mixes with comparable strengths were successfully achieved by replacing cement with GGBS and thereby providing a better path for sustainable development.

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“…(Thuku Keithy Kamau, Benard Omondi, Janet Oyaro) (Ariffin et al, 2013;Bakharev, 2005;Kantarcı, 2022). In dissolving the source materials, (Hydrogen ions) OH ions aid in breaking the aluminosilicates (Waqas et al, 2021).…”

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confidence: 99%

Effect of Micro Lime on The Ambient Cured Sugarcane Bagasse Ash-Based Geopolymer Concrete

Kamau,

Omondi,

Oyaro

2023

jts

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Geopolymer concrete has been the ideal replacement for Ordinary Portland cement concrete in producing green concrete. The binder in geopolymer concrete is a cementitious paste made from amorphous Aluminosilicate and activated by an Alkaline solution. The geopolymerization process is initiated at elevated temperatures. Thus, the curing requires elevated temperatures. This curing method limits the application of geopolymer concrete in the construction industry. In a geopolymer mix, the presence of Calcium ions allows the formation of Calcium Aluminate Silicate and Calcium Silicate Hydrate gels, allowing ambient temperature curing. Therefore, this study investigates the effect of micro lime on the Sugarcane Bagasse Ash-based geopolymer concrete. The micro lime was added to the geopolymer concrete in 1, 3, 5 and 7% by the Sugarcane Bagasse Ash weight. A mix design was based on a Densified Mix Design Algorithm. The tests carried out included compressive strength and water absorption. Ambient curing of the SCBA-based geopolymer concrete was achieved with 1% of the micro lime. The compressive strength increased with the increase of the micro lime, 10N/mm2 at 1%, to 18.25N/mm2 at 7% micro lime. The ambient temperature-cured geopolymer concrete at 3% micro lime had the lowest water absorption rate.

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Influence of fiber characteristics on sulfate resistance of ambient‐cured geopolymer concrete

Cited by 10 publications

References 74 publications

Performance evaluation of fly ash and ground granulated blast furnace slag‐based geopolymer concrete: A comparative study

Performance evaluation of fly ash and ground granulated blast furnace slag‐based geopolymer concrete: A comparative study

Development of GGBS-Based Geopolymer Concrete Incorporated with Polypropylene Fibers as Sustainable Materials

Effect of Micro Lime on The Ambient Cured Sugarcane Bagasse Ash-Based Geopolymer Concrete

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