Factors affecting production and properties of self-compacting geopolymer concrete – A review

Pradhan, Priyanka; Panda, Soumyaranjan; Parhi, Suraj Kumar; Panigrahi, Saubhagya Kumar

doi:10.1016/j.conbuildmat.2022.128174

Cited by 60 publications

(12 citation statements)

References 110 publications

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“…The GC-BF shows less degradation of elements, while more degradation of elements is observed in the GC-PF. The same behaviour is observed in earlier literature (Pradhan et al. , 2022; Wu et al.…”

Section: Microstructure Analysissupporting

confidence: 91%

“…The SEM analysis of 0, 60 and 120 min heating times for GC, GC-SF, GC-PF and GC-BF samples is shown in Figure 18. In an unheated condition, it was observed that the alkaline binders such as FA and GGBS were fully reacted and formed strong three dimensions GP gels such as C-S-H, N-S-(A)-H and C-(A)-S-H (Pradhan et al, 2022). The microstructure of N-S-(A)-H and C-(A)-S-H is shown in Figure 7.…”

Section: Sem Analysismentioning

confidence: 99%

“…The CaO reacts with excess water in fresh GC and forms C-S-H, N-A-S-H, and C-A-S-H gels (Prasad et al, 2022a, b). The GC exhibits high mechanical and durability properties (water absorption, acid attacks) and excellent bond strength than conventional concrete (CC) (Gupta et al, 2021;Pradhan et al, 2022). GC showed higher residual strength than CC in the case of fire and impact resistance.…”

Section: Introductionmentioning

confidence: 99%

“…The GC exhibits high mechanical and durability properties (water absorption, acid attacks) and excellent bond strength than conventional concrete (CC) (Gupta et al. , 2021; Pradhan et al. , 2022).…”

Section: Introductionmentioning

confidence: 99%

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Post-fire investigation on the mechanical properties and physical characteristics of fibre-reinforced geopolymer concrete

Prasad Burle,

Kiran,

Anand

et al. 2023

JSFE

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PurposeThe construction industries at present are focusing on designing sustainable concrete with less carbon footprint. Considering this aspect, a Fibre-Reinforced Geopolymer Concrete (FGC) was developed with 8 and 10 molarities (M). At elevated temperatures, concrete experiences deterioration of its mechanical properties which is in some cases associated with spalling, leading to the building collapse.Design/methodology/approachIn this study, six geopolymer-based mix proportions are prepared with crimped steel fibre (SF), polypropylene fibre (PF), basalt fibre (BF), a hybrid mixture consisting of (SF + PF), a hybrid mixture with (SF + BF), and a reference specimen (without fibres). After temperature exposure, ultrasonic pulse velocity, physical characteristics of damaged concrete, loss of compressive strength (CS), split tensile strength (TS), and flexural strength (FS) of concrete are assessed. A polynomial relationship is developed between residual strength properties of concrete, and it showed a good agreement.FindingsThe test results concluded that concrete with BF showed a lower loss in CS after 925 °C (i.e. 60 min of heating) temperature exposure. In the case of TS, and FS, the concrete with SF had lesser loss in strength. After 986 °C and 1029 °C exposure, concrete with the hybrid combination (SF + BF) showed lower strength deterioration in CS, TS, and FS as compared to concrete with PF and SF + PF. The rate of reduction in strength is similar to that of GC-BF in CS, GC-SF in TS and FS.Originality/valuePerformance evaluation under fire exposure is necessary for FGC. In this study, we provided the mechanical behaviour and physical properties of SF, PF, and BF-based geopolymer concrete exposed to high temperatures, which were evaluated according to ISO standards. In addition, micro-structural behaviour and linear polynomials are observed.

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Section: Microstructure Analysissupporting

confidence: 91%

Section: Sem Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Post-fire investigation on the mechanical properties and physical characteristics of fibre-reinforced geopolymer concrete

Prasad Burle,

Kiran,

Anand

et al. 2023

JSFE

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“…There are many factors that affect the properties of geopolymer materials, such as Si/Al ratio, moisture content, activators, curing conditions, and so on. − Davidovits reported that the structure of geopolymer materials is related to the Si/Al ratio. When the Si/Al ratios in the source material are 1, 2, and 3, the structure of the geopolymer will be poly(sialate) type (–Si–O–Al–O–), poly(sialate-siloxo) type (–Si–O–Al–O–Si–O–), and poly(sialate-disiloxo) type (–Si–O–Al–O–Si–O–Si–O–), respectively.…”

Section: Introductionmentioning

confidence: 99%

Tunable Thermal Conductivity of Sustainable Geopolymers by the Si/Al Ratio and Moisture Content: Insights from Atomistic Simulations

Liu,

2024

J. Phys. Chem. B

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In this work, the effects of the Si/Al ratio and moisture content on thermal transport in sustainable geopolymers have been comprehensively investigated by using the molecular dynamics simulation. The thermal conductivity of geopolymer systems increases with the increase of Si/Al ratio, and the phonon vibration frequency region, which plays a major role in the main increase of its thermal conductivity, is 8−25 THz, while the rest of the frequency interval contributes less. With the increase of moisture content, the thermal conductivity of geopolymer systems decreases at first, then increases, and finally stabilizes, which is contrary to the changing trend of the porosity of the system. This is mainly because the existence of pores leads to phonon scattering during thermal transport, which, in turn, affects the thermal conductivity of the system. When the moisture content is 5%, the thermal conductivity reaches a minimum value of about 1.103 W/ (m•K), which is 40.2% lower than the thermal conductivity of the system without a water molecule. This work will help to enhance the physical level understanding of the relationship between the geopolymer structures and thermal transport properties.

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Self-compacting Geopolymer Concrete: A Critical Review

Afrin,

Bano,

Deo

2024

Lecture Notes in Civil Engineering

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Factors affecting production and properties of self-compacting geopolymer concrete – A review

Cited by 60 publications

References 110 publications

Post-fire investigation on the mechanical properties and physical characteristics of fibre-reinforced geopolymer concrete

Post-fire investigation on the mechanical properties and physical characteristics of fibre-reinforced geopolymer concrete

Tunable Thermal Conductivity of Sustainable Geopolymers by the Si/Al Ratio and Moisture Content: Insights from Atomistic Simulations

Self-compacting Geopolymer Concrete: A Critical Review

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