Potential of Soil Stabilization Using Ground Granulated Blast Furnace Slag (GGBFS) and Fly Ash via Geopolymerization Method: A Review

Abdila, Syafiadi Rizki; Abdullah, Mohd Mustafa Al Bakri; Ahmad, Romisuhani; Burduhos-Nergis, Dumitru Doru; Rahim, Shayfull Zamree Abd; Omar, Mohd Firdaus; Sandu, Andrei Victor; Vizureanu, Petrică; Syafwandi,

doi:10.3390/ma15010375

Cited by 66 publications

(20 citation statements)

References 96 publications

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“…The mechanical strengths of the samples obtained, comparable to Portland cement, justify the use of these geopolymer pastes in the production of geopolymer concretes and in the production of precast concrete. Results obtained in the current study are in accordance with results previously obtained in the literature, while completing the knowledge about the production of alkaline-activated geopolymer materials [ 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 ].…”

Section: Resultssupporting

confidence: 91%

Influence of Fe2O3, MgO and Molarity of NaOH Solution on the Mechanical Properties of Fly Ash-Based Geopolymers

et al. 2022

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The use of waste from industrial activities is of particular importance for environmental protection. Fly ash has a high potential in the production of construction materials. In the present study, the use of fly ash in the production of geopolymer paste and the effect of Fe2O3, MgO and molarity of NaOH solution on the mechanical strength of geopolymer paste are presented. Samples resulting from the heat treatment of the geopolymer paste were subjected to mechanical tests and SEM, EDS and XRD analyses. Samples were obtained using 6 molar and 8 molar NaOH solution with and without the addition of Fe2O3 and MgO. Samples obtained using a 6 molar NaOH solution where Fe2O3 and MgO were added had higher mechanical strengths compared to the other samples.

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Section: Resultssupporting

confidence: 91%

Influence of Fe2O3, MgO and Molarity of NaOH Solution on the Mechanical Properties of Fly Ash-Based Geopolymers

et al. 2022

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“…The red mud dump can produce strong alkaline leachate, which can also harm people and animals near the dump . Therefore, many researchers have used red mud, fly ash, and coal gangue to prepare geopolymers and roadbed materials and achieved some good application results. , However, it is worth noting that the red mud contains many available chemical components such as aluminum, iron, and scandium, in which the content of aluminum and iron accounts for 40–60% of the total amount. , Efficient recovery of aluminum and iron from red mud is an important way for its comprehensive utilization of “reduction, recycling, and harmlessness”. At present, the extraction of aluminum and iron from red mud mainly involves magnetization roasting-magnetic separation for the recovery of iron and alkali roasting-alkali leaching for the recovery of aluminum.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Application of Polyaluminum Ferric Sulfate from Red Mud: Behaviors of Leaching, Polymerizing, and Coagulation

Li,

Zhang,

Zhu

2024

ACS Omega

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Red mud is a solid waste containing valuable components, such as aluminum and iron. This paper aims to recover aluminum and iron from red mud by acid leaching and prepare polyaluminum ferric sulfate (PAFS) to apply for the turbidity reduction treatment of coal slurry water. The behaviors of leaching, polymerizing, and coagulation were analyzed by leaching thermodynamics and advanced micro-detection methods. More than 90% of aluminum and 60% of iron in red mud were dissolved into the leaching solution by using 50% sulfuric acid (v/v) with 7 mL/g at 100 °C for 2 h, where the crystal lattice of cancrinite was significantly destroyed to promote the dissolution of aluminum. The low polymerization (Al + Fe) a , medium polymerization (Al + Fe) b , and high polymerization (Al + Fe) c could be generated in PAFS by adjusting the basicity of the leaching solution with 0.7−0.9. The removal efficiency of turbidity of wastewater could reach more than 95% by using PAFS at 25 mg/L in the pH range of 6.0−7.0. The turbidity reduction mechanism included not only the electric neutralization of (Al + Fe) a but also the adsorption of (Al + Fe) b and the entrapment effect of (Al + Fe) c . This current study contributes to the future development of red mud based on flocculants containing aluminum and iron for wastewater treatment.

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“…A mix with a binder to sand ratio of 0.5 has been adopted for concrete patch repair [ 20 ]. Flyash and GGBS-based geopolymers have also been used for soil stabilization, particularly for the applications of road construction in Subgrade layers [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Flexural Performance and Microstructural Studies of Trough-Shaped Geopolymer Ferrocement Panels

Malathy¹,

Mohan²,

Kathirvel

et al. 2022

Materials

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Geopolymer mortar is the best solution as an alternative to cement mortar in civil engineering. This paper deals with the effect of geopolymer mortar on the strength and microstructural properties under ambient curing conditions. In this research, geopolymer mortars were prepared with fly ash and steel slag (in the ratio 1:2.0, 1:2.5 and 1:3.0) as precursors with NaOH and Na2SiO3 as activator solution solutions (in the ratios of 0.5, 0.75 and 1.0) with concentrations of NaOH as 8 M, 10 M, 12 M and 14 M to study the compressive strength behaviour. From the experimental results, it was observed that the geopolymer mortar mix with the ratio of fly ash and steel slag 1:2.5, 12 M NaOH solution and the ratio of NaOH and Na2SiO3 0.5 exhibits the maximum compressive strength results in the range of 55 MPa to 60 MPa. From the optimized results, ferrocement panels of size 1000 mm × 1000 mm × 50 mm were developed to study the flexural behaviour. The experimental results of the flexural strength were compared with the analytical results developed through ABAQUS software. It was observed that the Trough-shaped geopolymer ferrocement panel exhibits 56% higher value in its ultimate strength than the analytical work. In addition to the strength properties, microstructural analysis was carried out in the form of SEM, EDAX and XRD from the tested samples.

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Potential of Soil Stabilization Using Ground Granulated Blast Furnace Slag (GGBFS) and Fly Ash via Geopolymerization Method: A Review

Cited by 66 publications

References 96 publications

Influence of Fe2O3, MgO and Molarity of NaOH Solution on the Mechanical Properties of Fly Ash-Based Geopolymers

Influence of Fe2O3, MgO and Molarity of NaOH Solution on the Mechanical Properties of Fly Ash-Based Geopolymers

Preparation and Application of Polyaluminum Ferric Sulfate from Red Mud: Behaviors of Leaching, Polymerizing, and Coagulation

Flexural Performance and Microstructural Studies of Trough-Shaped Geopolymer Ferrocement Panels

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