Separação de resíduos sólidos urbanos na universidade Mandume Ya Ndemufayo: contributo para a sustentabilidade DOI Creative Commons

António Mambo,

Eugénia Maria Victória Tavares Raimundo

Revista Angolana de Ciencias, Journal Year: 2024, Volume and Issue: 6(2), P. e060205 - e060205

Published: Dec. 26, 2024

Context of the research: This study looks at separation Urban Solid Waste (MSW) origin, in perspective convergence with SDG 12 and adoption practices conducive to mitigation harmful effects waste on environment. Preserving environment is responsibility all active forces society. The notion effectiveness recycling gave new guise what was seen as useless waste. these according its rules an important stage process, which brings several advantages economy, concept sustainability based. For Angolan universities, having installed containers for solid disposal classified a quality indicator. Objective article: To understand how packaging that are produced Mandume Ya Ndemufayo University (UMN) done. Methodology: research, by design, case quantitative qualitative approach, achieve goal, we used questionnaire survey made through google form, participation 6 Dependent Bodies UMN. Results: It observed 83.3% Units integrate UMN do not separate organic from recyclables, while 16.7% sometimes performs separation. Conclusion: present presents generic information about conditions MSW sustainable practice, although it yet considered routine.

Language: Английский

Friction Prediction in Asphalt Pavements: The Role of Separated Macro- and Micro-Texture Parameters Under Dry and Wet Conditions DOI Creative Commons
Jie Gao,

Jingjing Fan,

Chong Gao

et al.

Lubricants, Journal Year: 2025, Volume and Issue: 13(4), P. 138 - 138

Published: March 24, 2025

The characteristics of pavement texture are key determinants skid resistance, directly affecting tire-pavement interactions. This study examines the relationship between separated textures and friction coefficients under dry wet conditions. Using 3D laser scanning, data were collected from 40 asphalt sections in Nanchang. processed through Fourier Transform Butterworth filtering, enabling separation macro- micro-textures. Based on ISO 25178-2, 16 parameters—including Sa (Arithmetic Mean Height), Str (Texture Aspect Ratio), Vmc (Core Material Volume), Ssk (Skewness)—were selected to represent micro-texture features. These parameters analyzed against coefficients, regression models developed predict FDry FWet. results show significant effects both coefficients. Among macro-texture parameters, strongly correlate with FDry, suggesting that greater surface roughness core material volume enhance Conversely, negatively correlates indicating skewed profiles improve resistance. Other also influence varying extents. For micro-texture, Sdc (Material Height Difference), Spd (Peak Density), Vvv (Valley Void Volume) primarily affect FWet, all showing positive correlations. indicates sharp peaks void structures resistance effectively reducing field testing complexity cost. provide an efficient tool for evaluating supporting performance maintenance management. highlights distinct roles macro offering insights optimizing design maintenance.

Language: Английский

Citations

0
Hydrogen peroxide activation of waste tire crumb rubber for improving compatibility with bitumen: Laboratory and molecular dynamics insights DOI Creative Commons

Nie Tian,

Piergiorgio Tataranni, Cesare Sangiorgi

et al.

Journal of Road Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: May 1, 2025

Language: Английский

Citations

0
From Waste to Roads: Improving Pavement Performance and Achieving Sustainability with Recycled Steel Slag and Low-Density Polyethylene DOI Creative Commons

Syed Amir Mehmood,

Muhammad Imran Khan, Sarfraz Ahmed

et al.

Buildings, Journal Year: 2025, Volume and Issue: 15(3), P. 476 - 476

Published: Feb. 3, 2025

The use of waste, recycled, and modified materials is increasingly popular in roadway construction for sustainability pavement longevity. This research examines the combination steel slag (SS) low-density polyethylene (LDPE), commonly used plastic bags manufacturing by-products, to mitigate environmental pollution. LDPE was tested as a binder modifier two bitumen grades, 60–70 80–100, at concentrations 3%, 5%, 7% by weight. SS replacement coarse aggregate. physical properties both unmodified grades were analyzed before creating testing hot-mix asphalt (HMA) samples. dynamic modulus these samples measured temperatures 4.4 °C, 21.1 37.8 54.4 °C with frequencies 0.1 Hz, 0.5 1 5 10 25 Hz. Master curves developed, data underwent design experiment (DOE) computational intelligence (CI) analyses. Using KENPAVE, mechanistic–empirical tool, analysis assessed life enhancements damage ratio each grade. results showed that adding increases softening point penetration grade but decreases ductility due increased stiffness, leading premature fatigue failure higher levels. Both 3% SS-modified improved Marshall Stability across all temperature frequency ranges. Specifically, enhanced stability 13–16% SS-LDPE 30–32%. KENPAVE improvement 19–25% reduction 15–18%. In comparison, demonstrated 50–60% 25–35%. Overall, this study concludes LDPE- SS-LDPE-modified HMA 80–100 provide optimal improving performance.

Language: Английский

Citations

0
Recycled Materials in Construction: Trends, Status, and Future of Research DOI Open Access

Jiawei Wu,

Xunrong Ye,

Huachun Cui

et al.

Sustainability, Journal Year: 2025, Volume and Issue: 17(6), P. 2636 - 2636

Published: March 17, 2025

The utilization of recycled materials has emerged as a pivotal strategy for mitigating resource depletion and reducing carbon emissions in the construction industry. However, existing reviews predominantly focus on specific technical aspects, often overlooking interdisciplinary complexities associated with systems engineering challenge. This study systematically 1533 documents from Web Science Core Collection, integrating quantitative qualitative analytical approaches to assess current state future trajectory field, thereby addressing research gaps. findings highlight substantial evolution building waste recovery multifaceted domain encompassing value assessment, circular economy principles, advanced technologies, collaboration, long-term societal benefits. identifies six key themes materials: life cycle biological natural materials, concrete, asphalt infrastructure, demolition waste, environmental impacts composite factors. Furthermore, is categorized into two primary dimensions: strategies technological tools. analysis directions underscores potential AI-driven innovations their role enhancing human living environments. developing countries continue face critical challenges, necessitating further integration knowledge exchange. Finally, this proposes comprehensive systematic disciplinary framework that offers valuable insights strategic planning advancements field.

Language: Английский

Citations

0
Advances in the research of interfacial properties of reclaimed asphalt mixture: A comprehensive review DOI
Jincheng Wang,

Zizhen Dong,

Jinxi Zhang

et al.

Journal of Cleaner Production, Journal Year: 2024, Volume and Issue: 481, P. 144154 - 144154

Published: Nov. 1, 2024

Language: Английский

Citations

2
Separação de resíduos sólidos urbanos na universidade Mandume Ya Ndemufayo: contributo para a sustentabilidade DOI Creative Commons

António Mambo,

Eugénia Maria Victória Tavares Raimundo

Revista Angolana de Ciencias, Journal Year: 2024, Volume and Issue: 6(2), P. e060205 - e060205

Published: Dec. 26, 2024

Context of the research: This study looks at separation Urban Solid Waste (MSW) origin, in perspective convergence with SDG 12 and adoption practices conducive to mitigation harmful effects waste on environment. Preserving environment is responsibility all active forces society. The notion effectiveness recycling gave new guise what was seen as useless waste. these according its rules an important stage process, which brings several advantages economy, concept sustainability based. For Angolan universities, having installed containers for solid disposal classified a quality indicator. Objective article: To understand how packaging that are produced Mandume Ya Ndemufayo University (UMN) done. Methodology: research, by design, case quantitative qualitative approach, achieve goal, we used questionnaire survey made through google form, participation 6 Dependent Bodies UMN. Results: It observed 83.3% Units integrate UMN do not separate organic from recyclables, while 16.7% sometimes performs separation. Conclusion: present presents generic information about conditions MSW sustainable practice, although it yet considered routine.

Language: Английский

Citations

0