Exploration of fungal resistivity and mechanical performance of Zn-phases-doped geopolymers: ZnO and Zn/Al-LDH nanoparticles DOI
M. Ramadan,

D.G. Sayed,

Faten A. Selim

et al.

Construction and Building Materials, Journal Year: 2024, Volume and Issue: 457, P. 139369 - 139369

Published: Nov. 29, 2024

Language: Английский

Upgrading physico-mechanical characteristics and bacterial resistivity for cementless pastes modified with ZnAl2O4 nano-spinel: A comparative study with ZnO DOI
M. Ramadan, M.S. Amin,

Faten A. Selim

et al.

Journal of Building Engineering, Journal Year: 2024, Volume and Issue: unknown, P. 110700 - 110700

Published: Sept. 1, 2024

Language: Английский

Citations

3
Towards sustainability: Upcycling bypass dust for production of TiO2-grafting alkali-activated cement as cleaner building materials DOI
M. Ramadan,

S.M.A. El-Gamal,

Fatma Mostafa Helmy

et al.

Journal of Building Engineering, Journal Year: 2025, Volume and Issue: 107, P. 112795 - 112795

Published: April 30, 2025

Language: Английский

Citations

0
Recycling of environmental harmful industrial wastes in eco-friendly building materials production suitable for specific applications DOI
Mona Shehab,

S.M.A. El-Gamal,

Hossam Hassan

et al.

Journal of Building Engineering, Journal Year: 2024, Volume and Issue: unknown, P. 111201 - 111201

Published: Oct. 1, 2024

Language: Английский

Citations

3
Impact of WO<sub>3</sub>-Nanoparticles on the Setting Time and Early Strength for Different Cementitious Materials DOI

S.M.A. El-Gamal,

Mostafa A. Sayed,

Alaa Mohsen

et al.

Materials science forum, Journal Year: 2024, Volume and Issue: 1123, P. 125 - 133

Published: July 18, 2024

Generally, the setting time and early strength of cementitious materials are good indications to identify their suitability be employed as binding materials. Due high surface area nanomaterials, it is considered one optimal solutions modify these properties. Accordingly, this work focused on comparing impact laboratory-prepared tungsten oxide nanoparticles (WO 3 -NP) two materials: OPC alkali-activated slag (AAS). The initial/final-setting compressive up 28-days AAS specimens, modified with 1, 2 wt.% WO -NP, were investigated. results displayed that -NP has a significant acceleration both Moreover, dosage from (1 wt.%) upgraded by 19.5 15.1% for AAS, respectively after 7 days. nucleation-seeds nano-filler effect -NPs focal explanations behind improving properties via formation strength-giving phases then obtaining compact microstructure proved XRD SEM.

Language: Английский

Citations

2
Influence of Precursor Particle Size and Calcium Hydroxide Content on the Development of Clay Brick Waste-Based Geopolymers DOI Open Access
Ronaldo A. Medeiros-Junior, Marisa Thiesen, Andrea Murillo Betioli

et al.

Minerals, Journal Year: 2024, Volume and Issue: 14(11), P. 1169 - 1169

Published: Nov. 18, 2024

This study evaluated the effect of precursor particle size and calcium hydroxide (CH) incorporation on microstructure, compressive strength, rheological properties clay brick waste (BW)-based geopolymers. Rheological analyses were used to evaluate fresh state XRD, SEM, EDS performed analyze microstructure. The results showed that reduction in BW CH significantly contributed obtaining better strength Furthermore, decreased yield stress, plastic viscosity, hysteresis area geopolymers, while promoted opposite effect. Increasing content accelerated geopolymerization reactions reduced workability geopolymers over time. However, since milling process is costly, for 2 h was more efficient from a technical–economic point view. In addition, not only early hardening when necessary, but also improvement through matrix densification. Therefore, this show definition material proportions using as an aluminosilicate source.

Language: Английский

Citations

2
Recycling some byproducts for fabrication of green cement with good mechanical strength and high efficiency for wastewater treatment DOI Creative Commons

Fatma Mostafa Helmy,

S.M.A. El-Gamal,

M. Ramadan

et al.

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

Published: Nov. 13, 2024

Abstract This research aims to produce green cement, as an alternative traditional with outstanding performance. Five alkali-activated cement pastes were fabricated based on NaOH-activation of slag (GGBFS), bypass (B), and/or silica fume (S). Codes five are C, C-20B, C-30B, C-10B10S, and C-20B10S, C is the control paste containing 100% slag. The compressive strength was measured at different curing regimes: Conventional for 3 months autoclave 4 bar/153◦C, 7 bar/178◦C, 10 bar/198◦C h. XRD, TGA/DTG, SEM/EDX, BET/BJH techniques utilized clarify phase development, morphological texture features formed composite pastes. Besides, removal capacity some methylene blue indigo-carmine dyes from aqueous media evaluated. results confirmed that C10B10S (80%GGBFS + 10%B 10%S) have significant mechanical properties distinctive meso-porosity can remove both anionic cationic dyes.

Language: Английский

Citations

1
Exploration of fungal resistivity and mechanical performance of Zn-phases-doped geopolymers: ZnO and Zn/Al-LDH nanoparticles DOI
M. Ramadan,

D.G. Sayed,

Faten A. Selim

et al.

Construction and Building Materials, Journal Year: 2024, Volume and Issue: 457, P. 139369 - 139369

Published: Nov. 29, 2024

Language: Английский

Citations

1