Investigation of Alkali-Activated Slag-Based Composite Incorporating Dehydrated Cement Powder and Red Mud DOI Open Access
Aref A. Abadel, Hussam Alghamdi,

Yousef R. Alharbi

et al.

Materials, Journal Year: 2023, Volume and Issue: 16(4), P. 1551 - 1551

Published: Feb. 13, 2023

Recycled construction cementitious materials (RCCM) and red mud (RM) could be considered a type of discarded material with potential properties. Generally, landfilling stacking are utilized to dispose this solid waste, which can detrimental the environment sustainability sector. Accordingly, productive process for making eco-efficient alkali-activated slag-based samples inclusion RCCM is studied in paper. Dehydrated cement powder (DCP) attained through high-temperature treatment RCCM, obtained from alumina industry. Subsequently, DCP RM as partial substitute granulated blast furnace slag (GBFS) mixtures. Two different batches were designed; first batch had only at dosage 15%, 30%, 45%, 60% GBFS, second both GBFS. Different strength durability characteristics assessed. The findings show that when dehydrated high quantities, specimens enhanced, compressive improving by 42.2% 28 days. Such improvement was 7.5% each added. results revealed have negative effect on workability, whilst they positive impact drying shrinkage well mechanical strength. X-ray diffraction micro-structural analysis showed amount increased, smaller number reactive products forms, microstructure denser than case made alone. It also confirmed used optimized dosages, sustainable binder substitute; thus, valorizing wastes inhibiting their environmental footprint.

Language: Английский

Shear strength of eco-friendly self-compacting concrete beams containing ground granulated blast furnace slag and fly ash as cement replacement DOI Creative Commons
Mahmoud Elsayed, Bassam A. Tayeh, Yazan I. Abu Aisheh

et al.

Case Studies in Construction Materials, Journal Year: 2022, Volume and Issue: 17, P. e01354 - e01354

Published: July 27, 2022

Language: Английский

Citations

42
Properties of concrete with addition carbon nanotubes: A review DOI
Jawad Ahmad, Zhiguang Zhou

Construction and Building Materials, Journal Year: 2023, Volume and Issue: 393, P. 132066 - 132066

Published: June 15, 2023

Language: Английский

Citations

41
Mechanical performance of fiber-reinforced concrete and functionally graded concrete with natural and recycled aggregates DOI Creative Commons

Sabireen,

Faheem Butt, Afnan Ahmad

et al.

Ain Shams Engineering Journal, Journal Year: 2023, Volume and Issue: 14(9), P. 102121 - 102121

Published: Jan. 11, 2023

This study aims to assess the mechanical performance of functionally graded concrete (FGC) in comparison conventional plain cement (PCC) and fibre-reinforced (FRC). For this purpose, five mixes were prepared, defined eleven patterns, including PCC as a control mix, two FRC mixes, eight combinations for FGC mixes. The hooked-end steel fibres recycled thin polyethylene terephthalate (PET) strips from used bottles utilized 0.75 % volume mix natural aggregates replaced by 15 weight with plastic (RPA) (RCA) all specimens was assessed compressive, split tensile flexural strength tests, whereas quality evaluated ultrasonic pulse velocity (UPV) test. results revealed that containing has 50.6 higher compressive strength, while PET-FRC exhibited 42.4 lower than PCC. best combination is RCA + SFRC (H), which showed 27.6 more (SFRC) highest 47.5 (J), yielding 29.3 On other hand, both contribute enhancement FRC. (K) yielded upper bottom layers, respectively, giving 40 specimen. UPV values depicted enhanced concrete. value recorded (G) fibres, almost reached limit recommended values.

Language: Английский

Citations

34
Eco-friendly concrete incorporating palm oil fuel ash: Fresh and mechanical properties with machine learning prediction, and sustainability assessment DOI Creative Commons
Noor Md. Sadiqul Hasan, Md. Habibur Rahman Sobuz, Nur Mohammad Nazmus Shaurdho

et al.

Heliyon, Journal Year: 2023, Volume and Issue: 9(11), P. e22296 - e22296

Published: Nov. 1, 2023

Rising natural resource consumption leads to increased hazardous gas emissions, necessitating the concrete industry's focus on sustainable alternatives like palm oil fuel ash (POFA) replace cement. Also, advanced machine learning (ML) techniques can uncover previously unreported insights about effects of POFA that may be missing from literature. Hence, this study investigates influence varying concentrations fresh and mechanical characteristics with quantifying ML approaches microstructural performance, as well environmental impact structural concrete. For this, cement substitutions 5 %, 15 25 35 45 % (by weight cement) were utilized. enhanced overall workability, slump increments ranging approximately 9 %-55 compacting factor 4 %-12 %. Mechanical performance improved up replacement levels, highest enhancements observed in compressive (4.5 %), splitting tensile (36 flexural (31 %) strength, for mix containing POFA. The finer particle size by reducing porosity, aligning strength. was assessed measuring eCO2 revealing a potential reduction 44 Incorporating %-15 yielded ideal results, significantly enhancing sustainability cost-effectiveness. Regarding approach, it low regression coefficient (R2) contrasts sharply higher R2 values random forest (RF) ensemble model, indicating satisfactory precision prediction experimental results.

Language: Английский

Citations

33
Investigation of Alkali-Activated Slag-Based Composite Incorporating Dehydrated Cement Powder and Red Mud DOI Open Access
Aref A. Abadel, Hussam Alghamdi,

Yousef R. Alharbi

et al.

Materials, Journal Year: 2023, Volume and Issue: 16(4), P. 1551 - 1551

Published: Feb. 13, 2023

Recycled construction cementitious materials (RCCM) and red mud (RM) could be considered a type of discarded material with potential properties. Generally, landfilling stacking are utilized to dispose this solid waste, which can detrimental the environment sustainability sector. Accordingly, productive process for making eco-efficient alkali-activated slag-based samples inclusion RCCM is studied in paper. Dehydrated cement powder (DCP) attained through high-temperature treatment RCCM, obtained from alumina industry. Subsequently, DCP RM as partial substitute granulated blast furnace slag (GBFS) mixtures. Two different batches were designed; first batch had only at dosage 15%, 30%, 45%, 60% GBFS, second both GBFS. Different strength durability characteristics assessed. The findings show that when dehydrated high quantities, specimens enhanced, compressive improving by 42.2% 28 days. Such improvement was 7.5% each added. results revealed have negative effect on workability, whilst they positive impact drying shrinkage well mechanical strength. X-ray diffraction micro-structural analysis showed amount increased, smaller number reactive products forms, microstructure denser than case made alone. It also confirmed used optimized dosages, sustainable binder substitute; thus, valorizing wastes inhibiting their environmental footprint.

Language: Английский

Citations

31