Geopolymer mortars having glassy materials considering mechanical and microstructural features

Journal of Building Engineering, Journal Year: 2024, Volume and Issue: 91, P. 109738 - 109738

Published: May 23, 2024

Language: Английский

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Experimental Study of Alkali-Activated Cementitious Materials Using Thermally Activated Red Mud: Effect of the Si/Al Ratio on Fresh and Mechanical Properties

Buildings, Journal Year: 2025, Volume and Issue: 15(4), P. 565 - 565

Published: Feb. 12, 2025

Bayer red mud (RM)-based geopolymers are economical and ecofriendly alternatives to cement because of their superior performance. This study investigated alkali-activated cementitious materials by combining RM, fly ash (FA) slag, the mixtures were used produce composites. The influence Si/Al molar ratio (3.30–3.79) on initial properties (setting time flowability) hardened (compressive strength, drying shrinkage water permeability) composite was studied. Na2O content fixed at 4 wt%, thermal activation temperature 800 °C. phase evolution geopolymerization mechanism effect material FTIR, XRD, TG–DTG SEM–EDS. results M1.2Si333 indicated that compressive strength blends can reach 33.5 MPa 28 days, with a rate 1.20%. Compressive decreases, while increases higher ratio. Microstructural analyses revealed low alkali activator modulus enhance dissolution precursors form C–(A)–S–H gels, which increase strength. promoted application RM-based geopolymer-engineered enhanced resource efficiency bauxite residue.

Language: Английский

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Investigating experimentally the potency of divergent sodium hydroxide and sodium silicate molar proportions on silica fume and obsidian‐based geopolymer mortars

Structural Concrete, Journal Year: 2025, Volume and Issue: unknown

Published: March 1, 2025

Abstract The search for and development of new binders that can replace traditional Portland cement is vital importance from an environmental perspective. Geopolymers are one the most important solutions in this regard. composed various types containing sufficient Al Si sources activated with alkaline activators. In addition to their high mechanical durability features beside cement, they alternatives reducing carbon emissions. Although obsidian (OB) silica fume (SF), which waste materials, have resources geopolymers, there been very few studies on these materials. purpose study experimentally investigate properties geopolymer mortars OB‐based geopolymers different proportions SF substituted ranging 2.5 10 weight percent. sodium silicate (Na 2 SiO 3 ), hydroxide (NaOH) has also used as activator molar such 6, 8, 10, 12, 14 M. alkali activator/binder proportion was standardized 0.45 curing temperature 150°C. experimental research diverse mixing ratios consisted stages. first stage, effects (SH) a constant concentration 12 M were measured all mixtures. second SH (SS) activators characteristics performance studied. third tests carried out determine compressive strength (CS) water absorption, sorptivity, UPV mortars. addition, microstructural x‐ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscope‐EDS changes microstructure. peak CS 66.24 MPa acquired sample S1. substitution does not significant positive effect properties. However, absorption sorptivity. maximum improvement tendency increases direct rate. rate control S1 5.95%, decreased 4.33% S5 10% substitution. SEM images clearly showed mortar specimens had structures matrix, capillary cracks, microvoids, matrices contributed positively strengths. Based results study, manufactured OB be develop environmentally friendly sustainable building

Language: Английский

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Physical, chemical and radiation shielding properties of metakaolin-based geopolymers containing borosilicate waste glass

Radiation Physics and Chemistry, Journal Year: 2024, Volume and Issue: 224, P. 112075 - 112075

Published: July 18, 2024

Language: Английский

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Preparation of geopolymers from thermally activated lithium slag: Activity enhancement and microstructure

Journal of Building Engineering, Journal Year: 2024, Volume and Issue: 88, P. 109256 - 109256

Published: April 7, 2024

Language: Английский

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Effect of waste glass powder on the durability and microstructural properties of fly ash-GGBS based alkali activated concrete containing 100 % recycled concrete aggregate

Construction and Building Materials, Journal Year: 2024, Volume and Issue: 447, P. 138024 - 138024

Published: Aug. 29, 2024

Language: Английский

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Performance modulation and optimization of PE fiber reinforced 3D-printed geopolymer

Construction and Building Materials, Journal Year: 2024, Volume and Issue: 429, P. 136449 - 136449

Published: May 1, 2024

Language: Английский

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Effects of binder component and curing regime on compressive strength, capillary water absorption, shrinkage and pore structure of geopolymer mortars

Construction and Building Materials, Journal Year: 2024, Volume and Issue: 442, P. 137707 - 137707

Published: Aug. 1, 2024

Language: Английский

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Geopolymer bricks: The next generation of construction materials for sustainable environment

Construction and Building Materials, Journal Year: 2024, Volume and Issue: 445, P. 137876 - 137876

Published: Aug. 17, 2024

Language: Английский

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Mechanism of geopolymeric solidification in shield-tunnelling slurry from diverse sources: The role of bentonite adsorption in influencing the reaction process

Construction and Building Materials, Journal Year: 2024, Volume and Issue: 431, P. 136627 - 136627

Published: May 15, 2024

Language: Английский

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