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

Rubberized geopolymer composites: A comprehensive review DOI
Shaker Qaidi, Ahmed Salih Mohammed, Hemn Unis Ahmed

et al.

Ceramics International, Journal Year: 2022, Volume and Issue: 48(17), P. 24234 - 24259

Published: June 13, 2022

Language: Английский

Citations

193
Concrete Containing Waste Glass as an Environmentally Friendly Aggregate: A Review on Fresh and Mechanical Characteristics DOI Open Access
Shaker Qaidi, ‎Hadee Mohammed Najm,

Suhad M. Abed

et al.

Materials, Journal Year: 2022, Volume and Issue: 15(18), P. 6222 - 6222

Published: Sept. 7, 2022

The safe disposal of an enormous amount waste glass (WG) in several countries has become a severe environmental issue. In contrast, concrete production consumes large natural resources and contributes to greenhouse gas emissions. It is widely known that many kinds may be utilized rather than raw materials the field construction materials. However, for wide use building construction, it necessary ensure characteristics resulting are appropriate. Recycled one most attractive can used create sustainable compounds. Therefore, researchers focus on cement mortar by utilizing as aggregate or pozzolanic material. this article, literature discussing recycled partial complete replacement aggregates been reviewed focusing effect fresh mechanical properties concrete.

Language: Английский

Citations

184
Ultra-high-performance geopolymer concrete: A review DOI
Shaker Qaidi, Dawood Sulaiman Atrushi, Ahmed Salih Mohammed

et al.

Construction and Building Materials, Journal Year: 2022, Volume and Issue: 346, P. 128495 - 128495

Published: July 20, 2022

Language: Английский

Citations

148
Ultra-high-performance fiber-reinforced concrete. Part IV: Durability properties, cost assessment, applications, and challenges DOI Creative Commons
Mahmoud H. Akeed, Shaker Qaidi, Hemn Unis Ahmed

et al.

Case Studies in Construction Materials, Journal Year: 2022, Volume and Issue: 17, P. e01271 - e01271

Published: June 28, 2022

Ultra-high-performance concrete (UHPC) is a type of cement-based composite for new construction and/or restoration existing structures to increase service life. It an innovative material that can be suitable alternative exposed aggressive conditions. After decades research and development, wide range commercial UHPC compositions have been produced worldwide cover growing number applications demand high-quality materials. has significant advantages over regular concrete, but its use limited due design codes prohibitive cost. Therefore, comprehensive investigation the durability characteristics essential provide fundamental information testing requirements procedures expand practical applications. Part I reviewed developments, principles, raw materials UHPFRC. II hydration microstructure III fresh hardened properties This IV covers properties, cost assessment, applications, challenges V mixture design, preparation, mixing, casting, curing review expected advance knowledge promote further UHPC.

Language: Английский

Citations

142
Fly Ash-Based Geopolymer Composites: A Review of the Compressive Strength and Microstructure Analysis DOI Open Access
Shaker Qaidi, ‎Hadee Mohammed Najm,

Suhad M. Abed

et al.

Materials, Journal Year: 2022, Volume and Issue: 15(20), P. 7098 - 7098

Published: Oct. 12, 2022

Geopolymer (GP) concrete is a novel construction material that can be used in place of traditional Portland cement (PC) to reduce greenhouse gas emissions and effectively manage industrial waste. Fly ash (FA) has long been utilized as key constituent GPs, GP technology provides an environmentally benign alternative FA utilization. As result, thorough examination manufactured using precursor (FA-GP concrete) employed replacement for conventional become crucial. According the findings current investigations, FA-GP equal or superior mechanical physical characteristics compared PC concrete. This article reviews clean production, mix design, compressive strength (CS), microstructure (Ms) analyses collect publish most recent information data on In addition, this paper shall attempt develop comprehensive database based previous research study expounds impact substantial aspects such physio-chemical precursors, mixes, curing, additives, chemical activation CS The purpose work give viewers greater knowledge consequences uses making effective

Language: Английский

Citations

119
Ultra-high-performance fiber-reinforced concrete. Part I: Developments, principles, raw materials DOI Creative Commons
Mahmoud H. Akeed, Shaker Qaidi, Hemn Unis Ahmed

et al.

Case Studies in Construction Materials, Journal Year: 2022, Volume and Issue: 17, P. e01290 - e01290

Published: June 30, 2022

Recently, Ultra-High-Performance Fiber-Reinforced Concrete (UHPFRC) has offered notable advantages over other types of concrete. Therefore, a comprehensive investigation the latest developments in (UHPC) is necessary to provide essential information for materials testing requirements and procedures expand its practical applications. The present work four-part review UHPFRC. current first part focuses attention on developments, principles, raw Part II covers hydration microstructure III reviewed fresh hardened properties IV durability properties, cost assessment, applications, challenges This expected advance fundamental knowledge UHPC promote further research applications UHPC.

Language: Английский

Citations

108
The Present State of the Use of Waste Wood Ash as an Eco-Efficient Construction Material: A Review DOI Open Access
Rebeca Martínez‐García,

P. Jagadesh,

Osama Zaid

et al.

Materials, Journal Year: 2022, Volume and Issue: 15(15), P. 5349 - 5349

Published: Aug. 3, 2022

A main global challenge is finding an alternative material for cement, which a major source of pollution to the environment because it emits greenhouse gases. Investigators play significant role in waste disposal by developing appropriate methods its effective utilization. Geopolymers are one best options reusing all industrial wastes containing aluminosilicate and materials concrete applications. Waste wood ash (WWA) used with other geopolymer production found pulp paper, wood-burning facilities, wood-fired plants. On hand, WWA manufacturing industry necessitates acquisition large tracts land rural areas, while some industries use incinerators burn waste, contributes air pollution, environmental problem. This review paper offers comprehensive current utilization partial replacement mineral materials, such as fly ash, base mortar production. usage construction sector offered, development tendencies assessed about mechanical, durability, microstructural characteristics. The impacts pozzolanic eco-concreting usages summarized. According findings, incorporating into useful sustainable progress reduction mostly behaves filler filling action moderate amounts offer fairly higher compressive strength concrete. detail study on mineralogy properties must be performed fill potential research gap.

Language: Английский

Citations

97
Application of Ultra-High-Performance Concrete in Bridge Engineering: Current Status, Limitations, Challenges, and Future Prospects DOI Creative Commons

Shaker Abdal,

Walid Mansour, Ibrahim Saad Agwa

et al.

Buildings, Journal Year: 2023, Volume and Issue: 13(1), P. 185 - 185

Published: Jan. 10, 2023

Ultra-high-performance concrete (UHPC) is a form of cementitious composite that has been the most innovative product in technology over last three decades. broadly employed for design numerous forms construction owing to its excellent mechanical characteristics and durability, studies on behavior have grown fast While utilization ultra-high-performance bridge engineering (BE) limited high costs, little recognized about UHPC various BE elements. As result these issues, comprehensive review current development trends should be conducted determine present state perspective. This study presents state-of-the-art applications BE. also discusses status, limitations, challenges, areas further investigation The aim this research help stakeholders understand distinctive characteristics, benefits, barriers broad applications. understanding will aid increasing entire market share both national worldwide building sectors.

Language: Английский

Citations

92
A Study on the Properties of Geopolymer Concrete Modified with Nano Graphene Oxide DOI Creative Commons

Ahmed M. Maglad,

Osama Zaid, Mohamed Moafak Arbili

et al.

Buildings, Journal Year: 2022, Volume and Issue: 12(8), P. 1066 - 1066

Published: July 22, 2022

This paper reports the results of a study conducted to examine impacts adding graphene oxide (GO) GBFS-fly ash-based geopolymer concrete. The concrete’s compressive strength, thermal conductivity, and modulus elasticity were assessed. X-ray diffraction (XRD) analysis was understand differences in mineralogical composition rapid chloride penetration test (RCPT) investigate changes permeability ions imposed by GO addition. showed that 0.25 wt.% increases strength GBFS-FA concrete 30.5% 37.5%, respectively. In contrast, reduced 35.3% relative GO-free counterparts. Thermal conductivity decreased as dosage increased, with maximum reduction 33% being observed FA65-G35 samples. Additionally, XRD suitability present research demonstrates very promising features GO-modified exhibit improved development durability compared traditional concrete, thus further advocating for wider utilization manufactured from industrial byproducts.

Language: Английский

Citations

90
Ultra-high-performance fiber-reinforced concrete. Part III: Fresh and hardened properties DOI Creative Commons
Mahmoud H. Akeed, Shaker Qaidi, Hemn Unis Ahmed

et al.

Case Studies in Construction Materials, Journal Year: 2022, Volume and Issue: 17, P. e01265 - e01265

Published: June 23, 2022

Ultra-high-performance concrete (UHPC) refers to cement-based materials exhibiting a compressive strength higher than 150 MPa, high ductility, and excellent durability. Besides, over the last twenty years, remarkable advances have taken place in research application of Ultra-High-Performance Fiber-Reinforced Concrete (UHPFRC). Therefore, comprehensive investigation durability characteristics UHPC is essential provide fundamental information for material testing requirements procedures expand its practical applications. Part I reviewed developments, principles, raw UHPFRC. II hydration microstructure This III covers fresh hardened properties IV properties, cost assessment, applications, challenges V mixture design, preparation, mixing, casting, curing review expected advance knowledge promote further applications UHPC.

Language: Английский

Citations

84