Geopolymer concrete as green building materials: Recent applications, sustainable development and circular economy potentials

Shehata, Nabila; Mohamed, O. A.; Sayed, Enas Taha; Abdelkareem, Mohammad Ali; Olabi, Abdul Ghani

doi:10.1016/j.scitotenv.2022.155577

Cited by 175 publications

(48 citation statements)

References 105 publications

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“…According to the concept of sustainable development, new environmentally friendly construction materials can protect the environment and save construction costs [ 24 , 25 ]. Qin et al [ 44 ] used coral reef and coral sand as coarse and fine aggregates to prepare concrete samples in the context of offshore engineering.…”

Section: Resultsmentioning

confidence: 99%

“…Today, the complexity of civil engineering has prompted the industry to develop a variety of new materials. In line with the concept of sustainability, the construction industry is trying to replace ordinary silicate cement concrete using geopolymer concrete [ 23 , 24 , 25 ]. Similarly, the formulation of high-performance concrete from machine-made sand is one of the concrete material sustainability studies [ 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

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Orthogonal Experimental Study on Concrete Properties of Machine-Made Tuff Sand

et al. 2022

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Machine-made sand instead of natural sand has become an inevitable choice for the sustainable development of the concrete industry. Orthogonal experiment and grey correlation analysis were used to investigate the performance of machine-made tuff sand concrete. The optimal concrete mix ratio of machine-made sand was obtained by orthogonal test and its working performance was verified. Grey correlation analysis was applied to compare the factors affecting the mechanical properties of the machine-made sand concrete. The test results show that the sand rate has the greatest degree of influence on slump and slump expansion. The mineral admixture has the greatest effect on the 7-day compressive strength of the concrete. Additionally, the water–cement ratio has the greatest influence on the 28-day compressive strength. The mechanical and working properties of the machine-made sand concrete reach the optimum condition when the mineral admixture is 20%, the sand rate is 46%, the stone powder content is 10% and the water–cement ratio is 0.30. Comparing different fine aggregate concretes of similar quality, we conclude that the mechanical and working properties of tuff sand concrete and limestone sand concrete and river sand concrete are similar. The compressive strengths of the mechanism concrete show the greatest correlation with roughness and the least correlation with stone powder content. The stone powder content has almost no effect on the compressive strength of concrete when the stone powder content does not exceed a certain range. The results of the study point out the direction for the quality control of concrete with machine-made sand.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Orthogonal Experimental Study on Concrete Properties of Machine-Made Tuff Sand

et al. 2022

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“…The key factors for higher compressive strength at ambient temperature for reference mix and mix with 15% ceramic replacement are high surface area of binders, high ambient temperature, and presence of CaO in WCWP. The higher surface area of the binders and extended curing at room temperature can offer higher compressive strength of fly ash GPC [49]. Chindaprasirt and Rattanasak (2017) reported better later-age strength for fly ash GPC cured at 35 °C for 72 h compared to cure at 65 °C for 24 h [50].…”

Section: Mechanical Strength Of Gpcmentioning

confidence: 99%

Ceramic Waste Powder as a Partial Substitute of Fly Ash for Geopolymer Concrete Cured at Ambient Temperature

Bhavsar

Panchal

2022

Civ Eng J

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The growth of the construction industry has expanded the demand for ceramic building products such as ceramic tiles, which constitute essential building materials. Nonetheless, a huge quantity of waste powder is produced during the polishing of ceramic tiles. The disposal of ceramic waste powder is a key environmental concern that needs to be properly addressed. The purpose of this research is to evaluate the potential of recycling ceramic waste powder as a geopolymer binder. The main objective consists of exploring the impacts of two types of ceramic waste powder (vitrified tiles and wall tiles) on the partial substitution of fly ash in geopolymer concrete. For this, concrete was prepared under ambient conditions without oven curing. Slump, compressive strength, split tensile strength, and modulus of elasticity tests were performed to measure the workability and the mechanical properties of the geopolymer concrete. Its durability was evaluated through water absorption and sorptivity tests. The microstructural behavior was investigated using scanning electron microscopy and X-ray diffraction measurements. The investigation revealed that a 15% partial replacement of fly ash by wall-tile ceramic waste powder in geopolymer concrete gave similar compressive strength, a 3% increase in tensile strength, and a 7% improvement in the modulus of elasticity. Partial replacement of fly ash with 15% vitrified ceramic waste powder reduced sorptivity and improved the microstructure of geopolymer concrete. The findings revealed that ceramic waste powder can be used to replace 10–15% of the fly ash in M35 grade structural geopolymer concrete, which can be cured under ambient conditions. Doi: 10.28991/CEJ-2022-08-07-05 Full Text: PDF

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“… 24 Additionally, studies have investigated the possible production of effective geopolymer species using low-cost, natural, and easily available precursors, especially incorporated silica and alumina raw materials. 4 , 8 , 25 Recently, natural minerals containing metals or enriched with metal impurities have been evaluated as alternative adsorbents or raw materials for the development of other advanced structures. 3 Massive quantities of ferruginous kaolinite are produced annually as the byproducts of mining; such kaolinite has no economic value and its formation during the mining of pure kaolinite increases the hazardous environmental load.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Congo Red Adsorption and Photo-Fenton Oxidation over an Iron-Impeded Geopolymer from Ferruginous Kaolinite: Steric, Energetic, Oxidation, and Synergetic Studies

et al. 2022

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An iron-impeded geopolymer (Fe/GP) was synthesized from natural ferruginous kaolinite and optical waste for enhanced decontamination of Congo red (CR) dye. The adsorption properties of Fe/GP were assessed using an advanced monolayer equilibrium model of one energy ( R 2 > 0.99). Fe/GP possessed an active site density of 391.3 mg/g, which induced an adsorption capacity of 634 mg/g at the saturation state. The number of adsorbed CR molecules per site ( n = 1.56–1.62) reflected the possible uptake of two molecules per site via a multimolecular mechanism. The adsorption energy (5.12–5.7 kJ/mol) reflected the physical adsorption of the CR molecules via hydrogen bonding and/or van der Waals forces. As a catalyst, notable activity toward photo-Fenton oxidation was achieved even at high CR concentrations. Complete oxidation was observed after 30 (CR concentration: 10 mg/L), 50 (20 mg/L), 80 (30 mg/L), 120 (40 mg/L), and 140 min (50 mg/L). High oxidation efficiency was achieved using 0.1 g/L Fe/GP, 0.1 mL of hydrogen peroxide (H 2 O 2 ), and a visible light source. Increasing the Fe/GP dosage to 0.3 g/L resulted in complete oxidation of CR (100 mg/L) after 220 min. Therefore, synthetic Fe/GP can be used as a low-cost and superior catalyst and adsorbent for the removal of CR-based contaminants via adsorption or advanced oxidation processes.

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Geopolymer concrete as green building materials: Recent applications, sustainable development and circular economy potentials

Cited by 175 publications

References 105 publications

Orthogonal Experimental Study on Concrete Properties of Machine-Made Tuff Sand

Orthogonal Experimental Study on Concrete Properties of Machine-Made Tuff Sand

Ceramic Waste Powder as a Partial Substitute of Fly Ash for Geopolymer Concrete Cured at Ambient Temperature

Enhanced Congo Red Adsorption and Photo-Fenton Oxidation over an Iron-Impeded Geopolymer from Ferruginous Kaolinite: Steric, Energetic, Oxidation, and Synergetic Studies

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