The use of crushed recycled glass for alkali activated fly ash based geopolymer concrete and prediction of its capacity

Journal of Materials Research and Technology, Journal Year: 2023, Volume and Issue: 24, P. 8267 - 8281

Published: May 1, 2023

The influence of waste glass aggregate (WGA) with fly ash in certain proportions was studied by different amounts molarity and WGA proportion on geopolymer concrete (GPC). For this aim, the values NaoH concentration consumed investigation were determined as 11, 13 16. At end examinations, workability, setting time, compression strength (CS) test, splitting tensile (ST) tests flexural (FS) are performed. conclusions demonstrated that slump increased (WG) percentages decreased. While concerning CS, ST FS combination increased, these test results tend to decrease correspondingly. NaOH altered from 11 16, increase. This examination study demonstrates had also a slight adverse capacity workability. Moreover, use 10% 16 is suggested gain optimum sustainable GPC considering both fresh hardening properties combined molarity. Furthermore, examination, offered models established related those built several standard codes. More importantly an equation derived predict compressive mixture utilized study. Additionally, scanning electron microscopy (SEM) analysis achieved example parts attained examples formed WGA.

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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Data-driven based estimation of waste-derived ceramic concrete from experimental results with its environmental assessment

Journal of Materials Research and Technology, Journal Year: 2023, Volume and Issue: 24, P. 6348 - 6368

Published: April 27, 2023

The significant requirement for natural resources, specifically as ingredients of cement, is accelerating due to the considerable growth construction sector. Further, cement production adversely affects climate change generation bulk CO2 emissions. At same time, a quantum ceramic waste generated either in process or demolition products each year. unavailability an adequate way dispose this negatively impacts environment and landfills. Numerous researchers have explored potential utilizing powder partial replacement reduce allied issues. Hence, current study, supervised machine learning (ML) algorithms, i.e., Decision Tree (DT), AdaBoost (AdB), Bagging (Bg), Random Forest (RF), Gradient Boosting (GB) XGBoost (XGB) are employed predicting Compressive Strength (CS) concrete (CWPC). performance models also assessed by using coefficient determination (R2), Mean Absolute Error (MAE), Root Square (RMSE), Nash Sutcliffe efficiency (NSE). k-fold cross-validation technique applied afterwards validate model's performance. For CS CWPC, RF algorithm most effective among with higher R2 value 0.97 significantly lesser RMSE MAE values 1.40 1.13, respectively. SHAP analysis shows that curing days feature has highest influence on CWPC. As per quantitative Environmental Impact Assessment (EIA), 10% CWP content can 6.78%, 8.68%, 7.18%, 7.19% reduced change, ecosystem quality, human health, Moreover, effects non-renewable energy depletion ozone layer, global warming primarily be maximum 7%, 6%, 9%, application ML techniques estimating CWPC would benefit field civil engineering terms conserving effort, time.

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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Mechanical behavior in terms of shear and bending performance of reinforced concrete beam using waste fire clay as replacement of aggregate

Case Studies in Construction Materials, Journal Year: 2023, Volume and Issue: 18, P. e02104 - e02104

Published: April 26, 2023

In this experimental and analytical study, waste fire clay (WFC) was consumed by the use of replacing fine aggregate (FA) in confident amounts. It is targeted to remove current sustainable complications confirming consumption WFC reinforced concrete beams (RCBs) as raw materials. For purpose, FAs were partially replaced with proportions 0 %, 10 20 30 %. Based on motivation, a series studies performed 12 + small-scale bending shear RCBs 100×150×1000mm, considering altered stirrup spacing. While percentage selected % weight, correspondingly, longitudinal reinforcement taken into account Ф12, Ф10, Ф8. Besides, while tension compression reinforcements constant 2Ф12 2Ф6, spacing chosen 160 mm, 200 270 mm. As result increasing tensile ratio has made less effective. Similarly, decreases, dominates behavior, increases, determines behavior. Finally, content for increases ability at maximum level range %−30 it can be said that optimum The results obtained prediction ACI-318 reason difference between expected actual values explained detail.

Language: Английский

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Lightweight expanded-clay fiber concrete with improved characteristics reinforced with short natural fibers

Case Studies in Construction Materials, Journal Year: 2023, Volume and Issue: 19, P. e02367 - e02367

Published: Aug. 4, 2023

Weight reduction should be accompanied by maintaining the strength and quality of materials utilized in construction. One comprehensive solutions to this problem can utilization dispersed fiber reinforcement concrete with plant fibers various origins, which led sustainable production concrete. Knowledge regarding behavior lightweight is currently rather limited. Therefore, primary aim article was study possibility creating expanded-clay (ECFC) improved characteristics, considering coconut (CF) sisal (SF) fibers. Test methods scanning electron microscopy (SEM) analyses were used for structural study. Dispersed expanded clay organic origin has a positive effect on its mechanical characteristics. The optimal content obtained terms ratio density. CF SF, provides highest increases compressive flexural strength, 2% mass cement. It found that SF ECFC performs better greater gains than CF. increased 8.9%, bending 16.1%, 10.1% 18.3%, respectively, compared fiber-free composite. coefficient constructive values up 16% higher 18% composite without Moreover, formulas derived predict SF.

Language: Английский

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From Volcanic Popcorn to the Material of the Future: A Critical Review of Expanded Perlite Applications and Environmental Impacts

Sustainability, Journal Year: 2025, Volume and Issue: 17(4), P. 1454 - 1454

Published: Feb. 11, 2025

The comprehensive review delves into the diverse applications of expanded perlite, highlighting need for sustainable solutions in face changing market demands. analysis environmental impact traditional materials reveals critical issues, including increased energy consumption, resource depletion, and increasing waste generation. search safe with reduced renewable properties is proving to supporting a future. not only points out economic benefits widespread use containing perlite various industries but also presents current trends this material, options environmentally friendly solutions. This study examines idea Life Cycle Assessment (LCA), application which provides valuable insight production, transportation, potential recycling material. Furthermore, paper identifies most promising areas where further research needed, providing state affairs future challenges associated

Language: Английский

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Mechanical performance of geopolymer concrete with micro silica fume and waste steel lathe scraps

Case Studies in Construction Materials, Journal Year: 2023, Volume and Issue: 19, P. e02548 - e02548

Published: Oct. 5, 2023

Environmental studies for solutions are among the most important agendas of scientific world. Most new taking into account environmental effects. However, it is interesting world to find accumulated problems, reduce harmful production, and turn wastes that cause pollution useful products. In addition incorporating fly ash, a recognized environmentally friendly sustainable material, geopolymer concrete utilizes micro silica fume as binding agent. Furthermore, waste lathe scraps introduced enhance safeguard concrete's mechanical properties. During preparation phase, significant enhancements have been identified in workability setting time concrete. A total 16 test samples were prepared study. Micro 0%, 5%, 10% 20% 1%, 2% 3% examined. Experimental findings reveal 5% resulted notable improvements compressive, flexural, splitting tensile strength, with increases 14.4%, 7.45%, 6.18% respectively. higher additions found decrease these strengths. contrast, inclusion 1% led strength by 11.4%, 6.35%, 8.23% reduced capacity. The demonstrated combining scrap provided highest 25.7%, 12.0% Considering workability, time, observed all tests, recommended optimal mixture together scrap.

Language: Английский

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Compressive Strength Prediction of Rice Husk Ash Concrete Using a Hybrid Artificial Neural Network Model

Materials, Journal Year: 2023, Volume and Issue: 16(8), P. 3135 - 3135

Published: April 16, 2023

The combination of rice husk ash and common concrete both reduces carbon dioxide emission solves the problem agricultural waste disposal. However, measurement compressive strength has become a new challenge. This paper proposes novel hybrid artificial neural network model, optimized using reptile search algorithm with circle mapping, to predict RHA concrete. A total 192 data 6 input parameters (age, cement, ash, super plasticizer, aggregate, water) were utilized train proposed model compare its predictive performance that five other models. Four statistical indices adopted evaluate all developed evaluation indicates achieved most satisfactory prediction accuracy regarding R2 (0.9709), VAF (97.0911%), RMSE (3.4489), MAE (2.6451). also had better than previously models on same data. sensitivity results show age is important parameter for predicting

Language: Английский

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Feasibility analysis of the preparation of geopolymers from different types of coal based ash: Reaction, synthesis, and properties

Case Studies in Construction Materials, Journal Year: 2024, Volume and Issue: 20, P. e03234 - e03234

Published: April 30, 2024

This study compared the feasibility of circulating fluidized bed boiler fly ash (CFBFA), pulverized coal furnace (PCFA), and gasification slag (CGS) for preparation geopolymers by investigating Si Al dissolution reaction raw materials, product structure, development mechanical properties geopolymers. The results indicated that mechanism preparing were same three kinds based ash, i.e., depolymerization repolymerization Si-O Al-O bonds in materials. loose porous microstructure CFBFA resulted a high ratio amorphous Al, its self-hardening generated ettringite crystals. initial strength geopolymer (CFBFAG). active PCFA CGS released slowly during curing process, which was conducive to an enhanced compressive later stage. strengths (CGSG) after 90 days reached 52.1 MPa, 139% 11.4% higher than CFBFAG PCFAG time respectively. A analysis showed CGSG had denser more ordered gel network other geoploymers. Compared with PCFA, found have greater application potential

Language: Английский

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