Comparative study on the behaviour of GPC using silica fume and fly ash with GGBS exposed to elevated temperature and ambient curing conditions

Rao, A. Krishna; Kumar, D. Rupesh

doi:10.1016/j.matpr.2020.03.789

Cited by 12 publications

(1 citation statement)

References 12 publications

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“…As mentioned above, different hybrid methods are employed for developing predictive models to forecast f c of GPC that GGBS substituted with NZ and SF and different levels of NaOH concentration. For this purpose, a comprehensive set of experimental tests were collected on GPC specimens from the literature containing 254 data rows [17,44,45,[50][51][52][53][54][55][56][57][58][59][60][61][62][63].…”

Section: Explanation Of the Datasetmentioning

confidence: 99%

Retraction: Jin, J, Wu, T, Zhang, Z, Fan, J, Lee, X. Application of optimization‐based estimation analysis for predicting the compressive strength of eco‐friendly modified geopolymer concrete. Structural Concrete. 2022. https://doi.org/10.1002/suco.202201051

Jian-qing

Wu²,

Zhang

et al. 2022

Structural Concrete

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As one of the significant generators of greenhouse gases, the construction sector is under tremendous pressure due to the rising concern about global climate change and its detrimental effects on communities. Due to the environmental problems connected to the manufacture of cement, geopolymer concrete () has become a viable option for building materials. The results of this research assist in creating machine learning approaches for predicting the qualities of eco‐friendly concrete, which may be used as an alternative to conventional concrete to help lower emissions in the construction sector. In the current work, three hybrid techniques are used to create predictive models that estimate the compressive strength of when ground granulated blast‐furnace slag () is replaced with natural zeolite (), silica fume (), and various concentrations of . For this purpose, three machine learning methods were considered, named , , and hybridized with Fire Hawk Optimization (). The findings show that all approaches have excellent performance in projecting the of , both in terms of the permitted correlation between observed and predicted values. In conclusion, according to the results provided considering statistical indices, error distribution, and Taylor diagram analysis, it could be resulted that the proposed could be recognized as the outperformed model, where other algorithms were also trustable in prediction procedure of of .

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Section: Explanation Of the Datasetmentioning

confidence: 99%

Retraction: Jin, J, Wu, T, Zhang, Z, Fan, J, Lee, X. Application of optimization‐based estimation analysis for predicting the compressive strength of eco‐friendly modified geopolymer concrete. Structural Concrete. 2022. https://doi.org/10.1002/suco.202201051

Jian-qing

Wu²,

Zhang

et al. 2022

Structural Concrete

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Assessing the effects of Na₂SO₄ and NaCl on the properties of geopolymer concrete subjected to elevated temperatures

Yazıcı,

Karagöl

2024

Structural Concrete

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Since concrete is exposed to chemical, mechanical, or physical deteriorating effects simultaneously or successively under environmental conditions, this study focused on the durability of geopolymer concretes containing ground blast furnace slag (GGBFS) and fly ash (FA) under the effects of sulfate and salt after elevated temperatures. For this aim, five FA‐based geopolymer concrete mixtures with different GGBFS contents were produced and cured at 90°C for 72 h. First, the produced samples were exposed to 200, 400, 600, and 800°C for 2 h. Then, the samples were put into 5% sodium sulfate (Na2SO4) and 5% sodium chloride (NaCl) solutions for 30 days. The impacts of elevated temperature + Na2SO4 and elevated temperature + NaCl on geopolymer concrete were investigated by compressive strength, mass loss, visual examination, capillary water absorption, x‐ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FT‐IR). As a result, although cracking or strength decreases in concrete have been observed after only elevated temperatures, it has exhibited significant resistance to the integrated deterioration influences, has not disintegrated, and maintained its integrity under appropriate mix design and curing conditions. Shortly, the results demonstrated the ability of geopolymer concrete subjected to elevated temperatures with acceptable strength and durability under chemical effects, even if left for a short time.

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The effect of micro-SiO2 and micro-Al2O3 additive on the strength properties of ceramic powder-based geopolymer pastes

Kaya

2021

J Mater Cycles Waste Manag

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In this study, the effect of micro-SiO 2 (S) and micro-Al 2 O 3 (A) additives on the strength of geopolymer pastes was investigated. Micro S + A are added to the raw ceramic powder (CP) by weight. NaOH is used as activator. The ratio of NaOH is adjusted to contain 3%, 6% and 9% sodium (Na) in proportion to the binder weight. CP is mixed with micro S, micro A and NaOH + water in a standard cement mixer, it is placed in standard molds of 40 mm × 40 mm × 160 mm. The molds were wrapped in a fireproof oven bag and kept in the oven at 105 °C for 24 h. As a result of the mechanical tests on the samples compressive strength between 3.53 and 17.97 MPa were determined in the samples containing micro S and micro A. An increase in compressive strength was observed with the increase of S/A and (S + A)/CP ratio in the samples. As a result of the regression analysis, it was concluded that 1.60% for S/A, 8.52% for (S + A)/CP and 6.74% for Na in geopolymer pastes could be the optimum mixing ratio.

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Comparative study on the behaviour of GPC using silica fume and fly ash with GGBS exposed to elevated temperature and ambient curing conditions

Cited by 12 publications

References 12 publications

Retraction: Jin, J, Wu, T, Zhang, Z, Fan, J, Lee, X. Application of optimization‐based estimation analysis for predicting the compressive strength of eco‐friendly modified geopolymer concrete. Structural Concrete. 2022. https://doi.org/10.1002/suco.202201051

Retraction: Jin, J, Wu, T, Zhang, Z, Fan, J, Lee, X. Application of optimization‐based estimation analysis for predicting the compressive strength of eco‐friendly modified geopolymer concrete. Structural Concrete. 2022. https://doi.org/10.1002/suco.202201051

Assessing the effects of Na₂SO₄ and NaCl on the properties of geopolymer concrete subjected to elevated temperatures

The effect of micro-SiO2 and micro-Al2O3 additive on the strength properties of ceramic powder-based geopolymer pastes

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Comparative study on the behaviour of GPC using silica fume and fly ash with GGBS exposed to elevated temperature and ambient curing conditions

Cited by 12 publications

References 12 publications

Retraction: Jin, J, Wu, T, Zhang, Z, Fan, J, Lee, X. Application of optimization‐based estimation analysis for predicting the compressive strength of eco‐friendly modified geopolymer concrete. Structural Concrete. 2022. https://doi.org/10.1002/suco.202201051

Retraction: Jin, J, Wu, T, Zhang, Z, Fan, J, Lee, X. Application of optimization‐based estimation analysis for predicting the compressive strength of eco‐friendly modified geopolymer concrete. Structural Concrete. 2022. https://doi.org/10.1002/suco.202201051

Assessing the effects of Na2SO4 and NaCl on the properties of geopolymer concrete subjected to elevated temperatures

The effect of micro-SiO2 and micro-Al2O3 additive on the strength properties of ceramic powder-based geopolymer pastes

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Assessing the effects of Na₂SO₄ and NaCl on the properties of geopolymer concrete subjected to elevated temperatures