Advancements in low-carbon concrete as a construction material for the sustainable built environment

Developments in the Built Environment, Journal Year: 2023, Volume and Issue: 16, P. 100284 - 100284

Published: Nov. 30, 2023

Researchers seek sustainable materials for eco-friendly cement and concrete to reduce CO2 emissions. This paper offers an extensive overview of the research conducted on technology with minimal zero-carbon review reviews technologies lowering construction industry's carbon footprint, focusing alternative binders supplementary cementitious (SCMs). Additionally, explores transformative potential capture utilization sustainability. It also explored life cycle assessments, economic aspects, financial implications this technology. Overall, summarizes low-carbon in context development climate change mitigation. has been found that substituting SCMs reduces emissions without compromising strength durability. Materials such as slag, metakaolin, calcined clay, limestone can replace clinker, eliminating production. study highlights challenges, including market adoption material availability, offering insights successful implementation.

Language: Английский

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Recent advancements and future trends in 3D concrete printing using waste materials

Developments in the Built Environment, Journal Year: 2023, Volume and Issue: 16, P. 100187 - 100187

Published: June 29, 2023

3D printing concrete (3DPC) is an innovative construction technique that enables the creation of complex and customized structures. This technology offers advantages such as reduced material waste, faster times, ability to produce unique designs with intricate details. article reviews latest advancements in 3DPC technology, its potential transform building industries, developments systems, methodologies, materials, applications. The concludes several parameters mix proportions heavily influence process. Using waste supplementary cementitious materials (SCMs) can significantly improve 3DPC's rheology, but excessive use decrease early strength. Lastly, using recycled sand reduce flexural stiffness strength printed objects when loaded from different directions. also categorizes large-scale technologies into three primary categories, highlighting need optimize ink for better economic environmental outcomes 3DCP

Language: Английский

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Optimum usage of waste marble powder to reduce use of cement toward eco-friendly concrete

Journal of Materials Research and Technology, Journal Year: 2023, Volume and Issue: 25, P. 4799 - 4819

Published: June 18, 2023

In this study, waste marble powder (WMP) was used to replace cement of concrete in specific amounts. To accomplish aim, WMP replaced at 10%, 20%, 30%, and 40% the weight, a reference sample without (REF) created compare compressive strength, splitting tensile flexural strength. The replacement weight resulted 5.7%, 21.7%, 38.1%, 43.6% decreases strength compared with REF. Furthermore, results commonly followed same trend as However, led 5.3%, 8.6%, 19.4%, 26.7% addition, three different calculations, ranging from simple complex, were proposed compute mechanical resistances WMP. These calculations for practical applications validated using values literature implications obtained current research. While based on REF percentages, complex dependent design mixture, age samples, percentages. For ANN approach help coefficient determination (R2) K-fold-cross validation method. All methods provided high accurate estimation predict properties Based studies, utilizing 10% is recommended obtain optimum benefits considering both environmental aspects. Moreover, scanning electron microscope (SEM) energy dispersive X-ray (EDX) analyses then conducted observe interaction concrete. According SEM analyses, some pores detected ITZ observed reaction zone. On other hand, EDX presence manifested by levels Calcium.

Language: Английский

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A holistic review on the contribution of civil engineers for driving sustainable concrete construction in the built environment

Developments in the Built Environment, Journal Year: 2023, Volume and Issue: 16, P. 100273 - 100273

Published: Nov. 15, 2023

Comprehending civil engineer's crucial role in promoting sustainable construction practices is becoming increasingly essential as the globe faces severe environmental and economic concerns. This study discusses pivotal concrete construction, highlighting need for their expertise creating environmentally friendly resilient infrastructure. The manuscript further importance of procurement rules endorsing development, emphasizing well-crafted policies guidelines that incentivize eco-friendly practices. possible collaborative efforts between engineers policymakers are highlighted a fundamental driver construction. Furthermore, emergence low-carbon 3D printing technology also explored an innovative technique addressing its potential to reduce carbon emissions enhance efficiency. Moreover, valuable insights future research directions opportunities identified encourage investigation advancing

Language: Английский

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Behavior of Fibers in Geopolymer Concrete: A Comprehensive Review

Buildings, Journal Year: 2024, Volume and Issue: 14(1), P. 136 - 136

Published: Jan. 4, 2024

Over the last decades, cement has been observed to be most adaptive material for global development in construction industry. The use of ordinary concrete primarily requires addition cement. According record, there an increase direct carbon footprint during production. International Energy Agency, IEA, is working toward net zero emissions by 2050. To achieve this target, should a decline clinker-to-cement ratio. Also, deployment innovative technologies required production alternative binding materials can easy solution. There are several options substitute as agent, which available commercially. Non-crystalline alkali-aluminosilicate geopolymers have gained attention researchers over time. Geopolymer uses byproduct waste reduce dioxide Despite being advantageous, its utilization still limited it shows quasi-brittle behavior. Using different fibers started overcome weakness. This article emphasizes and reviews various mechanical properties fiber-reinforced geopolymer concrete, focusing on implementation wide range applications. study concludes that commercialized after establishment proper standards manufacturing.

Language: Английский

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Development of ultra-lightweight foamed concrete modified with silicon dioxide (SiO2) nanoparticles: Appraisal of transport, mechanical, thermal, and microstructural properties

Journal of Materials Research and Technology, Journal Year: 2024, Volume and Issue: 30, P. 3308 - 3327

Published: Feb. 6, 2024

Language: Английский

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Enhancing the sustainability, mechanical and durability properties of recycled aggregate concrete using calcium-rich waste glass powder as a supplementary cementitious material: An experimental study and environmental assessment

Sustainable Chemistry and Pharmacy, Journal Year: 2025, Volume and Issue: 44, P. 101985 - 101985

Published: March 8, 2025

Language: Английский

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Experimental investigation and analytical prediction of flexural behaviour of reinforced concrete beams with steel fibres extracted from waste tyres

Case Studies in Construction Materials, Journal Year: 2023, Volume and Issue: 19, P. e02227 - e02227

Published: June 19, 2023

In recent years, studies on the use of car tyre wastes in concrete have gained momentum. Especially, effect recycled waste steel wires (RWSWs) from tyres to be mixed into for using newly designed reinforced buildings performance construction elements is a fairly new research area. this study, bending behaviour 12 beams was investigated having 1/3 geometric scale, 100×150×1000 mm size, and produced with RWSW additives different volumetric ratios (1%, 2% 3%) under vertical loads. Another main parameter selected study amount varying tension reinforcements (2ϕ12, 2ϕ10 2ϕ8). The load carrying, stiffness, ductility, energy dissipation capacities were compared primary aim which examine present contribution RWSWs improvement beams. results revealed that mechanical properties hybrid vary depending dosages but are comparable those beams-only same fibre dosage. A positive obtained containing 2-3% RWSWs. Besides, found highly well mobilized at larger crack widths post-cracking strength recycled-fibre mixes significantly higher. Considering both fresh such as workability, recommended utilised On other hand, predictions methods given literature standards. Moreover, an equation derived better predict capacity

Language: Английский

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Rheological and mechanical characteristics of basalt fiber UHPC incorporating waste glass powder in lieu of cement

Ain Shams Engineering Journal, Journal Year: 2023, Volume and Issue: 15(3), P. 102515 - 102515

Published: Oct. 9, 2023

Ultra-High-Performance Concrete (UHPC) represents an exceptionally durable construction material distinguished by its notable strength, ductility, and durability. Previous investigations have demonstrated a limited exploration of UHPC containing basalt fiber waste glass as substitute for cement. Current study concentrates on assessing the impact incorporating powder (WGP) in lieu cement, workability, mechanical properties, microstructural attributes this composite. The substitution involved three distinct proportions pozzolanic powder: 10%, 20%, 30%, measured weight. A substantial number test specimens, exceeding one hundred, was accurately prepared to inspect engineering characteristics five varied formulations. Experimental outcomes underline that optimum compressive strength recorded at 28-day when employing 0.75% content replacing 20% cement with glass. This investigation establishes distinctive contribution WGP constituents enhancing microstructure UHPC.

Language: Английский

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Strength Reduction Due to Acid Attack in Cement Mortar Containing Waste Eggshell and Glass: A Machine Learning-Based Modeling Study

Buildings, Journal Year: 2024, Volume and Issue: 14(1), P. 225 - 225

Published: Jan. 14, 2024

The present study utilized machine learning (ML) techniques to investigate the effects of eggshell powder (ESP) and recycled glass (RGP) on cement composites subjected an acidic setting. A dataset acquired from published literature was employed develop learning-based predictive models for mortar’s compressive strength (CS) decrease. Artificial neural network (ANN), K-nearest neighbor (KNN), linear regression (LR) were chosen modeling. Also, RreliefF analysis performed relevance variables. total 234 data points train/test ML algorithms. Cement, sand, water, silica fume, superplasticizer, powder, 90 days CS considered as input outcomes research showed that could be applied evaluate reduction percentage in composites, including ESP RGP, after being exposed acid. Based R2 values (0.87 ANN, 0.81 KNN, 0.78 LR), well assessment variation between test anticipated errors (1.32% 1.57% 1.69% it determined accuracy ANN model superior KNN LR. sieve diagram exhibited a correlation amongst predicted target results. suggested RGP significantly influenced loss samples with scores 0.26 0.21, respectively. research, approach suitable predicting mortar environments, thereby eliminating lab testing trails.

Language: Английский

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