Influence of Using Various Percentages of Slag on Mechanical Properties of Fly Ash-based Geopolymer Concrete

Hussein, Sarah Sameer; Fawzi, Nada Mahdi

doi:10.31026/j.eng.2021.10.04

Cited by 10 publications

(11 citation statements)

References 1 publication

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“…Hussein and Fawzi [ 135 ] analysed different contents of geopolymer by using different ratios of fly ash (FA) to ground granulated blast furnace slag (GGBFS). Cement, fine aggregate, and coarse aggregate were used in the preparation of MR0 and MR1, while fly ash to slag ratios for MG0, MG1, MG2, and MG3 were 0.75:0.25, 0.65:0.35, and 0.55:0.45 and mixed with fine aggregate and coarse aggregate in MR1, MG1, MG2, and MG3 with 0.5% copper fibre added.…”

Section: Injection Moulding Processmentioning

confidence: 99%

Potential of New Sustainable Green Geopolymer Metal Composite (GGMC) Material as Mould Insert for Rapid Tooling (RT) in Injection Moulding Process

et al. 2023

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The investigation of mould inserts in the injection moulding process using metal epoxy composite (MEC) with pure metal filler particles is gaining popularity among researchers. Therefore, to attain zero emissions, the idea of recycling metal waste from industries and workshops must be investigated (waste free) because metal recycling conserves natural resources while requiring less energy to manufacture new products than virgin raw materials would. The utilisation of metal scrap for rapid tooling (RT) in the injection moulding industry is a fascinating and potentially viable approach. On the other hand, epoxy that can endure high temperatures (>220 °C) is challenging to find and expensive. Meanwhile, industrial scrap from coal-fired power plants can be a precursor to creating geopolymer materials with desired physical and mechanical qualities for RT applications. One intriguing attribute of geopolymer is its ability to endure temperatures up to 1000 °C. Nonetheless, geopolymer has a higher compressive strength of 60–80 MPa (8700–11,600 psi) than epoxy (68.95 MPa) (10,000 psi). Aside from its low cost, geopolymer offers superior resilience to harsh environments and high compressive and flexural strength. This research aims to investigate the possibility of generating a new sustainable material by integrating several types of metals in green geopolymer metal composite (GGMC) mould inserts for RT in the injection moulding process. It is necessary to examine and investigate the optimal formulation of GGMC as mould inserts for RT in the injection moulding process. With less expensive and more ecologically friendly components, the GGMC is expected to be a superior choice as a mould insert for RT. This research substantially impacts environmental preservation, cost reduction, and maintaining and sustaining the metal waste management system. As a result of the lower cost of recycled metals, sectors such as mould-making and machining will profit the most.

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Section: Injection Moulding Processmentioning

confidence: 99%

Potential of New Sustainable Green Geopolymer Metal Composite (GGMC) Material as Mould Insert for Rapid Tooling (RT) in Injection Moulding Process

et al. 2023

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“…Portland cement-based concrete deteriorates in adverse situations, either standard or extreme. The effects of corrosion and cracking on safety, design life, and service behavior are substantial [4]. The concrete's quasi-brittle properties and tensile destructive potential are greatly restored by short fibers [5].…”

Section: Introductionmentioning

confidence: 99%

Behavior of Reactive Powder Concrete reinforced with Hybrid Fibers containing Sustainable Materials

Hendi,

Aljalawi

2024

Eng. Technol. Appl. Sci. Res.

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This study investigates the behavior of recycled Reactive Powder Concrete (RPC), made from finely ground recycled raw materials and containing a certain percentage of recycled copper (electrical waste copper wire) and steel fibers. This concrete has a relatively low water-to-binder ratio and is composed of cement, fine aggregate, and ultrafine powders, such as quartz powder and silica fume. The properties of Fiber-Reinforced Reactive Powder Concrete (FR-RPC) containing micro-steel fibers, recycled copper fibers, and a mixture of steel-recycled and copper fibers were investigated. A micro-steel fiber RPC (MF1) was used as a reference mix, having 1% steel fibers by volume with 13 mm length and 0.2 mm diameter. Recycled copper fiber RPC (MF2) was prepared utilizing 1% recycled copper fibers by volume, with a diameter of 0.2 mm and a length of 10 mm. In addition, Hybrid FR-RPC (HFR-RPC) samples were prepared by mixing micro steel fibers and recycled copper fibers in proportions of 0.5-0.5% (MF3), 0.4-0.6% (MF4), and 0.3-0.7% (MF5), respectively. The compressive strength, flexural strength, and splitting tensile strength of these FR-RPC mixes were studied. The results displayed that MF3 achieved slightly lower compressive strength, flexural strength, and splitting tensile strength than MF1 and higher than MF2, MF4, and MF5. Although the mechanical strengths of MF3 were marginally lower than those of MF1, compressive strength, flexural strength, and splitting tensile strength were almost the same. Therefore, copper wire waste fibers can be employed along with steel fibers with excellent results.

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“…Sodium hydroxide, a caustic liquid, is commonly employed in conjunction with sodium silicate at a 2.5:1 ratio. Sodium is favored over potassium due to its comparatively cheaper cost [6]. The primary objective of this research is to investigate the flexural strength of fly ash-metakaolin geopolymer mortar reinforced with rice husk fibers and the effect of waste paper ash addition.…”

Section: Introductionmentioning

confidence: 99%

The Effect of the Utilization of Sustainable Materials on Some Mechanical Properties of Geopolymer Mortar

Mohammed,

Fawzi

2024

Eng. Technol. Appl. Sci. Res.

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Geopolymer concrete has been developed as a means of reducing carbon dioxide (CO₂) emissions due to concrete manufacturing, which account for around 5–10% of the total global CO₂ emissions. Additionally, this innovative material aims to utilize industrial waste as a sustainable resource. This study concentrates on developing a geopolymer mortar composition comprising 70% fly ash and 30% metakaolin. The mixture also includes 14 molars of sodium hydroxide, sodium silicate, saturated surface dry sand, water at a volume of 10% of the mix, and 1.5% superplasticizer. The solution-to-solid materials ratio was established at 0.55 while the ratio between sodium silicate and sodium hydroxide was established at 2.5:1. The geopolymer mortar was enhanced by rice husk fibers at varying volume percentages of 1%, 1.5%, and 2%. Additionally, waste paper, in the form of paper ash, was introduced as filler at a volume percentage of 5%. Following the demolding process, the specimens were cured in the controlled environment of an oven, with the temperature set at 60 °C for a period of 24 hr. Subsequently, the cured samples were stored for 7 and 28 days and then were tested. When different amounts of rice husk fibers were mixed in with a fixed amount of 5% paper ash, the flexural resistance of the geopolymer mortar increased significantly. After 7 days of curing, it was seen that the flexural strength experienced an increase of 4%, 13%, and 25%, and a further increase of 11%, 18%, and 31% after 28 days of curing. The results of the impact test showed a notable enhancement in impact resistance and energy absorption when incorporating paper ash and rice husk fibers. Specifically, the initial crack results exhibited a 50% rise, while the specimen failure after 28 days of curing showed a 66% improvement.

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Influence of Using Various Percentages of Slag on Mechanical Properties of Fly Ash-based Geopolymer Concrete

Cited by 10 publications

References 1 publication

Potential of New Sustainable Green Geopolymer Metal Composite (GGMC) Material as Mould Insert for Rapid Tooling (RT) in Injection Moulding Process

Potential of New Sustainable Green Geopolymer Metal Composite (GGMC) Material as Mould Insert for Rapid Tooling (RT) in Injection Moulding Process

Behavior of Reactive Powder Concrete reinforced with Hybrid Fibers containing Sustainable Materials

The Effect of the Utilization of Sustainable Materials on Some Mechanical Properties of Geopolymer Mortar

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