Compressive strength variation of alkali activated fly ash/slag concrete with different NaOH concentrations and sodium silicate to sodium hydroxide ratios

Niş, Anıl

doi:10.29187/jscmt.2019.39

Cited by 9 publications

(5 citation statements)

References 15 publications

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“…A value of 1.17 was found the best for GPC under ambient curing [ 51 ]. Other tests by Niş [ 64 ] showed that the critical silicate modulus depends on the molarity, in which for 14 M there was a ratio of 1, while for lower molarities the recommended value is 2. This finding supports that obtained previously by Rattanasak and Chindaprasirt [ 65 ].…”

Section: State-of-the-art Review Of Mechanical Properties Of Geopolymer Concretementioning

confidence: 99%

Survey of Mechanical Properties of Geopolymer Concrete: A Comprehensive Review and Data Analysis

2021

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Mechanical properties and data analysis for the prediction of different mechanical properties of geopolymer concrete (GPC) were investigated. A relatively large amount of test data from 126 past works was collected, analyzed, and correlation between different mechanical properties and compressive strength was investigated. Equations were proposed for the properties of splitting tensile strength, flexural strength, modulus of elasticity, Poisson’s ratio, and strain corresponding to peak compressive strength. The proposed equations were found accurate and can be used to prepare a state-of-art report on GPC. Based on data analysis, it was found that there is a chance to apply some past proposed equations for predicting different mechanical properties. CEB-FIP equations for the prediction of splitting tensile strength and strain corresponding to peak compressive stress were found to be accurate, while ACI 318 equations for splitting tensile and elastic modulus overestimates test data for GPC of low compressive strength.

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Section: State-of-the-art Review Of Mechanical Properties Of Geopolymer Concretementioning

confidence: 99%

Survey of Mechanical Properties of Geopolymer Concrete: A Comprehensive Review and Data Analysis

2021

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“…Nis [ 139 ] investigated geopolymer content using various NaOH concentrations and sodium silicate to sodium hydroxide ratios. The sodium silicate (Na 2 SiO 3 ) and sodium hydroxide (NaOH) solutions were used with four different sodium silicate to sodium hydroxide ratios (1, 1.5, 2, and 2.5) and three different molarities (6 M, 10 M, and 14 M) for alkali activation to evaluate the impact of these parameters on the compressive strength of the alkali-activated fly ash/slag concrete under ambient-curing (AC) and delayed oven-curing (OC) conditions.…”

Section: Injection Moulding Processmentioning

confidence: 99%

“…Based on various studies [ 137 , 138 , 139 , 140 , 141 ], the mechanical characteristics may be affected by the use of different ratios of sodium silicate, sodium hydroxide, and fly ash/alkaline activator. The strongest strength resulted from the fly ash/alkaline activator ratio of 2.0 and the sodium silicate/sodium hydroxide ratio of 2.5, which were used as the ideal ratio for sample preparation.…”

Section: Injection Moulding Processmentioning

confidence: 99%

“…For each mixed sample, a 100 mm × 200 mm cylinder mould was employed. The compressive strength and setting times of ASTM C 191-08 [ 139 ] were evaluated at 3, 7, 14, 28, and 56 days of curing. At 17 °C, the alkali-activated fly ash/slag paste took 55 min to start and 160 min to finish when the NaOH solution was 4 M and the water glass to NaOH solution by weight ratio was 0.5, as illustrated in Figure 12 .…”

Section: Injection Moulding Processmentioning

confidence: 99%

“… Compressive strengths of alkali-activated fly ash/slag specimens based on alkaline activator ratio type [ 139 ]. …”

Section: Figurementioning

confidence: 99%

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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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Multivariable models including artificial neural network and M5P-tree to forecast the stress at the failure of alkali-activated concrete at ambient curing condition and various mixture proportions

Ahmed

Mohammed

2022

Neural Comput & Applic

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Compressive strength variation of alkali activated fly ash/slag concrete with different NaOH concentrations and sodium silicate to sodium hydroxide ratios

Cited by 9 publications

References 15 publications

Survey of Mechanical Properties of Geopolymer Concrete: A Comprehensive Review and Data Analysis

Survey of Mechanical Properties of Geopolymer Concrete: A Comprehensive Review and Data Analysis

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

Multivariable models including artificial neural network and M5P-tree to forecast the stress at the failure of alkali-activated concrete at ambient curing condition and various mixture proportions

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