Siliceous fly ash and blast furnace slag based geopolymer concrete under ambient temperature curing condition

Das, Sourav Kumar; Shrivastava, Sandeep

doi:10.1002/suco.201900201

Cited by 32 publications

(16 citation statements)

References 28 publications

(34 reference statements)

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“…The σc of the FA-BGPC has reduced by 22.5% and 29.5% at 0.4 and 0.5 SH/SS ratios, respectively, as compared to the SH/SS ratio of 0.3. Similar results have been reported in other investigations, despite different SS/SH being utilized [83,100,112,144].…”

Section: Aggregate Contentsupporting

confidence: 91%

Compressive Strength of Sustainable Geopolymer Concrete Composites: A State-of-the-Art Review

et al. 2021

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The building industry, which emits a significant quantity of greenhouse gases, is under tremendous pressure due to global climate change and its consequences for communities. Given the environmental issues associated with cement production, geopolymer concrete has emerged as a sustainable construction material. Geopolymer concrete is an eco-friendly construction material that uses industrial or agricultural by-product ashes as the principal binder instead of Portland cement. Fly ash, ground granulated blast furnace slag, rice husk ash, metakaolin, and palm oil fuel ash were all employed as binders in geopolymer concrete, with fly ash being the most frequent. The most important engineering property for all types of concrete composites, including geopolymer concrete, is the compressive strength. It is influenced by different parameters such as the chemical composition of the binder materials, alkaline liquid to binder ratio, extra water content, superplasticizers dosages, binder content, fine and coarse aggregate content, sodium hydroxide and sodium silicate content, the ratio of sodium silicate to sodium hydroxide, the concentration of sodium hydroxide (molarity), curing temperature, curing durations inside oven, and specimen ages. In order to demonstrate the effects of these varied parameters on the compressive strength of the fly ash-based geopolymer concrete, a comprehensive dataset of 800 samples was gathered and analyzed. According to the findings, the curing temperature, sodium silicate content, and alkaline solution to binder ratio are the most significant independent parameters influencing the compressive strength of the fly ash-based geopolymer concrete (FA-BGPC) composites.

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Section: Aggregate Contentsupporting

confidence: 91%

Compressive Strength of Sustainable Geopolymer Concrete Composites: A State-of-the-Art Review

et al. 2021

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“…The reduction in the fc′ of the FA-GPC at the curing age of 28 days was 22.5% and 29.5% at 0.4 and 0.5 of SH to SS ratio, correspondingly, as compared to the SH to SS ratio of 0.3. Similar results can also be found in other studies even though different SS/SH was used [94,112,123,152]. Furthermore, an experimental research study has been carried out to investigate the effect of various parameters on the performance of FA-GPC.…”

Section: (Na2sio3/naoh) Ratiosupporting

confidence: 81%

“…For example, the compression strength of FA-GPC was improved by 8.5%, 14.7%, and 19.2% at 12, 14, and 16 molarities, respectively, as compared to the molarity of 10 M at the age of 28 days with the curing temperature of 60℃. In the same manner, some other research studies claimed that the fc′ was improved as the molarity of sodium hydroxide increased [88,114,122,123].…”

Section: Sodium Hydroxide (Naoh) Concentration (Molarity (M))mentioning

confidence: 69%

Compressive Strength of Geopolymer Concrete Composites: Modeling and Comprehensive Systematic Review

Ahmed

Mohammed

2021

Preprint

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The growing concern about global climate change and its adverse impacts on societies is putting severe pressure on the construction industry as one of the largest producers of greenhouse gases. Given the environmental issues associated with cement production, geopolymer concrete has emerged as a sustainable construction material. Geopolymer concrete is cementless concrete that uses industrial or agro by-product ashes as the main binder instead of ordinary Portland cement; this leads to being an eco-efficient and environmentally friendly construction material. Compressive strength is one of the most important mechanical property for all types of concrete composites including geopolymer concrete, and it is affected by several parameters like an alkaline solution to binder ratio (l/b), fly ash (FA) content, SiO2/Al2O3 (Si/Al) of the FA, fine aggregate (F) and coarse aggregate (C) content, sodium hydroxide (SH) and sodium silicate (SS) content, ratio of sodium silicate to sodium hydroxide (SS/SH), molarity (M), curing temperature (T), curing duration (CD) inside the oven and specimen ages (A). In this regard, a comprehensive systematic review was carried out to show the effect of these different parameters on the compressive strength of the fly ash-based geopolymer concrete (FA-GPC). In addition, multi-scale models such as Artificial Neural Network (ANN), M5P-tree (M5P), Linear Regression (LR), and Multi-logistic Regression (MLR) models were developed to predict the compressive strength of FA-GPC composites. For the first time, in the modeling process, twelve effective parameters including l/b, FA, Si/Al, F, C, SH, SS, SS/SH, M, T, CD, and A were considered the modeling input parameters. Then, the efficiency of the developed models was assessed by various statistical assessment tools like Root Mean Squared Error (RMSE), Mean Absolute Error (MAE), Scatter Index (SI), OBJ value, and the Coefficient of determination (R2). Results show that the curing temperature, sodium silicate content, and ratio of the alkaline solution to the binder content are the most significant independent parameters that influence on the compressive strength of the FA-GPC, and the ANN model has better performance for predicting the compressive strength of FA-GPC in compared to the other developed models.

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“…The invention of ambient‐cured geopolymer concrete is an economical solution, which can potentially reduce the consumption of conventional concrete in the construction industry 12,13 . However, high brittleness with low tensile and flexural strengths are the major challenges of geopolymer concrete 14,15 .…”

Section: Introductionmentioning

confidence: 99%

Behavior of axially loaded plain and fiber‐reinforced geopolymer concrete columns with glass fiber‐reinforced polymer cages

Ali

Sheikh

Hadi

2021

Structural Concrete

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In this study, the behavior of axially loaded plain and fiber‐reinforced geopolymer concrete columns reinforced with glass fiber‐reinforced polymer (GFRP) bars and helices was investigated. Ten ambient‐cured geopolymer concrete columns of 160 mm diameter and 640 mm height were cast and tested under concentric axial loads. The behavior of the columns was investigated under the effect of the type of reinforcement (steel vs. GFRP), pitch of the GFRP helices (40, 75, 100 mm), and addition of nonmetallic fibers, that is, glass fiber and polypropylene fiber. It was found that GFRP bar reinforced geopolymer concrete column achieved less axial load, confinement efficiency, and ductility compared to the geopolymer concrete column reinforced with the same amount of the steel reinforcement. Overall, the reduction in the pitch of the GFRP helices enhanced the confinement efficiency, post‐peak behavior, and ductility of the plain and fiber‐reinforced geopolymer concrete columns. Also, the addition of fibers significantly improved the ductility of the GFRP bar reinforced geopolymer concrete columns.

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Siliceous fly ash and blast furnace slag based geopolymer concrete under ambient temperature curing condition

Cited by 32 publications

References 28 publications

Compressive Strength of Sustainable Geopolymer Concrete Composites: A State-of-the-Art Review

Compressive Strength of Sustainable Geopolymer Concrete Composites: A State-of-the-Art Review

Compressive Strength of Geopolymer Concrete Composites: Modeling and Comprehensive Systematic Review

Behavior of axially loaded plain and fiber‐reinforced geopolymer concrete columns with glass fiber‐reinforced polymer cages

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