Characterization and properties of geopolymer nanocomposites with different contents of nano-CaCO3

Assaedi, Hasan; Alomayri, Thamer; Kaze, Cyriaque Rodrigue; Jindal, Bharat Bhushan; Subaer, Subaer; Shaikh, Faiz Uddin Ahmed; Alraddadi, Shoroog

doi:10.1016/j.conbuildmat.2020.119137

Cited by 112 publications

(43 citation statements)

References 28 publications

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“…Assaedi et al [ 61 ] investigated the influence of Calcium carbonate nanoparticles (nano-CaCO 3 ) on the microstructure and mechanical properties of geopolymer composite developed from activation of FA precursors. The authors identified that an additional level within 3 wt% allows nanofillers to provide significant strengthening effect and denser binding matrix.…”

Section: Geopolymer Cements: Basic Features and Novel Advancesmentioning

confidence: 99%

Geopolymers vs. Cement Matrix Materials: How Nanofiller Can Help a Sustainability Approach for Smart Construction Applications—A Review

2021

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In the direction of reducing greenhouse emissions and energy consumption related to the activities of the cement and concrete industry, the increasingly popular concept of eco-sustainability is leading to the development and optimization of new technologies and low impact construction materials. In this respect, geopolymers are spreading more and more in the cementitious materials field, exhibiting technological properties that are highly competitive to conventional Portland concrete mixes. In this paper, the mix design, mechanical properties, microstructural features, and mineralogical properties of geopolymer mixes are discussed, investigating the influence of the main synthesis parameters (curing regime, type of precursors, activator molarity, mix design) on the performance of the final product. Moreover, recent developments of geopolymer technology based on the integration of functional nanofillers are reported. The novelty of the manuscript is to provide a detailed collection of past and recent comparative studies between geopolymers and ordinary Portland concrete mixes in terms of strength properties, durability, fire resistance, and environmental impact by LCA analysis, intending to evaluate the advantages and limitations of this technology and direct research towards a targeted optimization of the material.

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Section: Geopolymer Cements: Basic Features and Novel Advancesmentioning

confidence: 99%

Geopolymers vs. Cement Matrix Materials: How Nanofiller Can Help a Sustainability Approach for Smart Construction Applications—A Review

2021

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“…In nature, carbonates are found in many minerals and play a crucial role in the carbon exchange of our planet [ 2 , 3 , 4 , 5 , 6 , 7 , 8 ]. Carbonate compounds are widely used in the construction industry, optics, and nanotechnology [ 9 , 10 , 11 , 12 , 13 , 14 , 15 ]. Appearance of the carbonate species due to chemical interaction with the atmosphere agents was detected at the surface of many oxide materials widely used in optical and electronic technologies [ 16 , 17 , 18 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Density Functional Theory Studies of Vibrational Spectra of Carbonates

Zhuravlev

Atuchin

2020

Nanomaterials

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Within the framework of the density functional theory (DFT) and the hybrid functional B3LYP by means of the CRYSTAL17 program code, the wavenumbers and intensities of normal oscillations of MgCO3, CaCO3, ZnCO3, CdCO3 in the structure of calcite; CaMg(CO3)2, CdMg(CO3)2, CaMn(CO3)2, CaZn(CO3)2 in the structure of dolomite; BaMg(CO3)2 in the structure of the norsethite type; and CaCO3, SrCO3, BaCO3, and PbCO3 in the structure of aragonite were calculated. Infrared absorption and Raman spectra were compared with the known experimental data of synthetic and natural crystals. For lattice and intramolecular modes, linear dependences on the radius and mass of the metal cation are established. The obtained dependences have predictive power and can be used to study solid carbonate solutions. For trigonal and orthorhombic carbonates, the linear dependence of wavenumbers on the cation radius RM (or M–O distance) is established for the infrared in-plane bending mode: 786.2–65.88·RM and Raman in-plane stretching mode: 768.5–53.24·RM, with a correlation coefficient of 0.87.

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“…Additionally, numerous later works about the applications of nanomaterials within the development industry have been carried out to make strides in the execution of development composites [27][28][29][30][31][32][33]. These works uncovered that the utilization of nanomaterials at lower doses rather than micro materials is compelling to improve the mechanical and strength behaviour of cementitious and Compressive strength.…”

Section: Introductionmentioning

confidence: 99%

“…nano CaCO 3 ). However, a recent study by Assaedi et al [30] has inspected the utilization of nano CaCO 3 up to an amount of 3% in GPC. This examination concluded that the mechanical properties of GPC can be made strides by the enhancement of nano CaCO 3 up to a measurement of 2% whereas it decreased the mechanical behaviour of GPC by expanding the amount of nano CaCO 3 to 3%.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and fracture behaviour of micro steel fibre-reinforced fly ash-based geopolymer paste containing nano CaCO₃

Alomayri

2021

Journal of Taibah University for Science

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The present study has investigated the mechanical properties of micro steel fibre-reinforced fly ash-based geopolymer pastes by adding different contents of nano CaCO 3 . Three contents (0%, 1%, 2%, and 3% by weight of fly ash) were evaluated for nano CaCO 3 while the content of micro steel fibres was kept constant at 0.5% by weight of paste. A control mix containing 0.5% micro steel fibres without any content of nano CaCO 3 was fabricated for comparison purposes. The evaluated mechanical characteristics of micro steel fibre-reinforced geopolymer pastes were the compressive strength, flexural strength, elastic modulus, Charpy impact strength, hardness, fracture toughness, toughness modulus, bending stress-strain response, bending load-deflection behaviour, compressive stress-strain response and toughness indices. The outcomes of the present study showed that the utilization of 2% nano CaCO 3 in micro steel fibre-reinforced GPC introduced the optimum mechanical performance for compressive strength, flexural strength, fracture toughness, elastic modulus, toughness modulus, and hardness. .

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Characterization and properties of geopolymer nanocomposites with different contents of nano-CaCO3

Cited by 112 publications

References 28 publications

Geopolymers vs. Cement Matrix Materials: How Nanofiller Can Help a Sustainability Approach for Smart Construction Applications—A Review

Geopolymers vs. Cement Matrix Materials: How Nanofiller Can Help a Sustainability Approach for Smart Construction Applications—A Review

Comprehensive Density Functional Theory Studies of Vibrational Spectra of Carbonates

Mechanical and fracture behaviour of micro steel fibre-reinforced fly ash-based geopolymer paste containing nano CaCO₃

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Characterization and properties of geopolymer nanocomposites with different contents of nano-CaCO3

Cited by 112 publications

References 28 publications

Geopolymers vs. Cement Matrix Materials: How Nanofiller Can Help a Sustainability Approach for Smart Construction Applications—A Review

Geopolymers vs. Cement Matrix Materials: How Nanofiller Can Help a Sustainability Approach for Smart Construction Applications—A Review

Comprehensive Density Functional Theory Studies of Vibrational Spectra of Carbonates

Mechanical and fracture behaviour of micro steel fibre-reinforced fly ash-based geopolymer paste containing nano CaCO3

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Product

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Mechanical and fracture behaviour of micro steel fibre-reinforced fly ash-based geopolymer paste containing nano CaCO₃