Mechanical Properties and Mechanism of Geopolymer Cementitious Materials Synergistically Prepared Using Red Mud and Yellow River Sand DOI Open Access

Weizhun Jin,

Y B Chen, Yajun Lv

et al.

Materials, Journal Year: 2024, Volume and Issue: 17(15), P. 3810 - 3810

Published: Aug. 2, 2024

In order to reduce the negative impact on environment caused by massive accumulation of red mud (RM) and Yellow River sand (YRS), new alkali-excited granulated blast-furnace slag (GGBS)/RM/YRS (AGRY) geopolymer cementitious materials were prepared combining RM YRS with GGBS in different ratios using sodium silicate as alkali exciter. The effects dosage curing conditions mechanical properties, hydration products, pore structure investigated analyzed terms cost carbon emissions. results showed that when was 40%, compressive strength AGRY material could reach 48.8 MPa at 28 d under standard curing, which properties comparable those without YRS. has a more compact internal structure, combination promotes chemical reaction Al Si elements generates (N, C)-A-S-H gel are key enhancement material. addition, is only 90% cement for same low emission accounting 43% emission. This study not provides way resource utilization YRS, but also contributes an excellent environmentally friendly construction industry achieve goal development.

Language: Английский

Assessing performance and environmental benefits of high-performance geopolymer mortar incorporating pumice and rice straw ash DOI

Ezzat Elfadaly,

Ahmed M. Othman,

Mobarak Aly

et al.

Sustainable Chemistry and Pharmacy, Journal Year: 2025, Volume and Issue: 44, P. 101918 - 101918

Published: Jan. 24, 2025

Language: Английский

Citations

12
Proposed simplified methodological approach for designing geopolymer concrete mixtures DOI Creative Commons
George Uwadiegwu Alaneme, Kolawole Adisa Olonade, Ebenezer Esenogho

et al.

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: July 2, 2024

The development of geopolymer concrete offers promising prospects for sustainable construction practices due to its reduced environmental impact compared conventional Portland cement concrete. However, the complexity involved in mix design often poses challenges engineers and practitioners. In response, this study proposes a simplified approach designing mixtures, drawing upon principles from standards recommended molar ratios oxides synthesis. proposed methodology aims streamline process while optimizing key factors such as chemical composition, alkali activation solution, water content, curing conditions achieve desired compressive strength workability. By leveraging commonalities between concrete, seeks facilitate adoption practical applications. guidelines have been validated through examples cured under different conditions, including outdoor oven curing. Future research should focus on validating experimental studies exploring cost-effective alternatives solutions enhance feasibility scalability production. Overall, holds promise advancing utilization alternative industry.

Language: Английский

Citations

10
Performance of Sustainable Geopolymer Concrete Made of Different Alkaline Activators DOI Creative Commons
Yasmin R. Hamed, Mostafa M. Keshta,

Mohamed M. Yousry Elshikh

et al.

Infrastructures, Journal Year: 2025, Volume and Issue: 10(2), P. 41 - 41

Published: Feb. 16, 2025

A major challenge in modern infrastructure is the excessive reliance on traditional Portland cement, which contributes significantly to environmental degradation and durability issues. This study addresses need for sustainable durable construction materials by investigating geopolymer concrete as an eco-friendly alternative, optimizing its mechanical microstructural properties enhance long-term performance applications. The of made with silica fume (SF) fly ash (FA) utilizing different alkaline activators (AAs) was examined this study. included sodium hydroxide (SH), potassium (PH), silicate (SS) solutions. total twelve mixes were prepared evaluated. considered several variables, including SF content (ranging from 10% 100%), type AA (SH+SS or PH+SS), concentration, cementitious (AA/C) ratio. Workability, compressive strength, bending tensile water absorption among characteristics that assessed, both fresh hardened states proposed concrete. microstructure also performing X-ray diffraction (XRD), energy dispersive (EDX), scanning electron microscopy (SEM) investigations a few chosen mixes. findings showed when 10%, 20%, 30%, 100% replacement FA, slump rose 15%, 120%, respectively. However, strength increased only up 20% SF. Geopolymer PH activator exhibited 13% lower compared SH. influenced presence SF, leading formation ettringite. Some FA particles remained unreacted partially reacted, along voids, observed. contribute development concrete, offering promising solution green structural

Language: Английский

Citations

1
Robust prediction models for flow and compressive strength of sustainable cement grouts for grouted macadam pavement using RSM DOI
Muhammad Imran Khan

Construction and Building Materials, Journal Year: 2024, Volume and Issue: 448, P. 138205 - 138205

Published: Sept. 9, 2024

Language: Английский

Citations

7
Impact of Pumice Substitution on Mortar Properties: A Case Study on Mechanical Performance and XRD Analysis DOI Creative Commons
Pablo Julián López González, Rodrigo Vivar-Ocampo, Humberto Raymundo González-Moreno

et al.

Infrastructures, Journal Year: 2025, Volume and Issue: 10(4), P. 95 - 95

Published: April 11, 2025

The incorporation of sustainable construction is essential for minimizing the environmental footprint cementitious composites. This research examines mechanical behavior and microstructural features alternative mortars in which pumice acts as a partial cement replacement. By applying Taguchi methodology, nine mortar mix variations were assessed at different replacement rates (15%, 25%, 50%), their strength was compared against control mixture without substitution. Additionally, an X-ray diffraction (XRD) analysis identified mineral components to evaluate performance durability. Based on statistical variance (ANOVA), with up 25% substitution are suggested they attain values comparable those mixture. study contributes advancement environmentally materials provides valuable insights into viability using infrastructure developments.

Language: Английский

Citations

0
Sustainable Utilization of Waste Pumice Powder in Slag-Based Geopolymer Concretes: Fresh and Mechanical Properties DOI Open Access
Zrar Safari, Khaleel H. Younis, Ibtisam Kamal

et al.

Sustainability, Journal Year: 2024, Volume and Issue: 16(21), P. 9296 - 9296

Published: Oct. 25, 2024

In societies worldwide, there is significant pressure on the construction industry to employ waste/recycled materials instead of natural-sourced develop infrastructures mitigate negative environmental consequences. This study investigated feasibility using waste pumice powder as a binder in place granular blast-furnace slag manufacture geopolymer concrete. Three sets GC mixes were developed with three ratios alkaline activator/binder (A/B) 0.45, 0.5, and 0.55. Eight prepared for each set, eight replacement GGBFS WPP (0%, 30%, 50%, 60%, 70%, 80%, 90%, 100%). The influence addition substitute source aluminosilicate precursors fresh (workability setting time), mechanical (compressive strength flexural strength), physical characteristics (density water absorption), microstructure morphology WPP/slag-based geopolymers studied. A linear correlation between UPV compressive was found. results revealed that times workability are affected by A/B ratio content WPP. reduces increases time (both initial final). There drop strengths percentage increased. maximum (60 MPa) (4.96 at an 0.45 100% mix obtained. However, containing 50% 28 MPa after days curing ambient temperature achieved, which acceptable structural applications.

Language: Английский

Citations

2
Mechanical Properties and Mechanism of Geopolymer Cementitious Materials Synergistically Prepared Using Red Mud and Yellow River Sand DOI Open Access

Weizhun Jin,

Y B Chen, Yajun Lv

et al.

Materials, Journal Year: 2024, Volume and Issue: 17(15), P. 3810 - 3810

Published: Aug. 2, 2024

In order to reduce the negative impact on environment caused by massive accumulation of red mud (RM) and Yellow River sand (YRS), new alkali-excited granulated blast-furnace slag (GGBS)/RM/YRS (AGRY) geopolymer cementitious materials were prepared combining RM YRS with GGBS in different ratios using sodium silicate as alkali exciter. The effects dosage curing conditions mechanical properties, hydration products, pore structure investigated analyzed terms cost carbon emissions. results showed that when was 40%, compressive strength AGRY material could reach 48.8 MPa at 28 d under standard curing, which properties comparable those without YRS. has a more compact internal structure, combination promotes chemical reaction Al Si elements generates (N, C)-A-S-H gel are key enhancement material. addition, is only 90% cement for same low emission accounting 43% emission. This study not provides way resource utilization YRS, but also contributes an excellent environmentally friendly construction industry achieve goal development.

Language: Английский

Citations

1