Article
Chemistry, Physical
Francesca Russo, Rosa Veropalumbo, Salvatore Antonio Biancardo, Cristina Oreto, Fabio Scherillo, Nunzio Viscione
Summary: Secondary raw materials, such as jet grouting waste, can be injected back into the economic system for use in asphalt mixtures. This study compared mixtures using different fillers and found that the cold recycled asphalt mixture containing jet grouting waste (CRAJ) performed the best, promoting the reuse of waste materials and meeting technical standards.
Article
Green & Sustainable Science & Technology
Siqi Zhou, Zhanning Yang, Rongrong Zhang, Feng Li
Summary: Geopolymer road grouting pastes were prepared with different mixture ratios of volcanic ash (VA) and metakaolin (MK), and their mechanical and rheological properties were evaluated. The results showed that the mechanical strength increased with the content of MK, and the paste with a mass ratio of VA/MK at 1:0.33 achieved a balance of mechanical strength and rheological properties. The microscopic experiments indicated that MK enhanced the mechanical strength of geopolymer through its high content of amorphous phases, smaller particle size, and nucleation effect, showing potential as an eco-friendly alternative to cement in road engineering.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Construction & Building Technology
Shuai Zhang, Yan He, Honggang Zhang, Jie Chen, Leping Liu
Summary: The rheological properties and mechanical properties of OAASGM with different content of fine sand powder were systematically evaluated in this study. It was found that fine sand powder effectively improved the flowability and prolonged the setting time of OAASGM, meeting the requirements of semi-flexible pavement.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Environmental Sciences
Cristina Oreto, Rosa Veropalumbo, Nunzio Viscione, Salvatore Antonio Biancardo, Francesca Russo
Summary: This research aims to provide innovative asphalt mixture solutions by designing asphalt base layers containing solidified Jet Grouting Waste particles, and evaluated their engineering performance and environmental impact through Life Cycle Assessment tests.
ENVIRONMENTAL RESEARCH
(2021)
Review
Construction & Building Technology
Zhongbo Chen, Jun Qiao, Xiaoyu Yang, Yu Sun, Daquan Sun
Summary: This paper reviews research on the design and performance of grouting materials for pouring semi-flexible pavement. The findings suggest that there is room for improvement in terms of fluidity and strength of laboratory grouting materials. The review aims to provide researchers with a comprehensive understanding and promote the application of semi-flexible pavement.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Wenhuan Liu, Yiwen Jiang, Zhongzhong Zhao, Renhao Du, Hui Li
Summary: This study developed a green and low-carbon early strength multi-solid waste composite grouting material using industrial solid wastes, which exhibited excellent performance with high compressive strength and low dry shrinkage.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Construction & Building Technology
Shuai Zhang, Yan He, Jing Li, Leping Liu, Xuemin Cui
Summary: Due to the opposite polarities, combining alkali-activated slag grouting material and asphalt mixture is challenging. This study used potassium methylsilicate (PMS), a small molecular surfactant, to modify the grouting material. The results showed that PMS is stable in the grouting material and can bind to the gel. The addition of 6% PMS reduced the contact angle between the grouting material and SBS-modified asphalt by 41.60% and achieved a complete Interface transition zone (ITZ) between the modified grouting material and the asphalt mixture.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Shabir Hussain Khahro, Yasir Javed, Zubair Ahmed Memon
Summary: A low-cost smart road health monitoring system has been designed to reduce maintenance expenses by monitoring road conditions in real time. The system can identify road sections in need of repair and rehabilitation, providing assistance for maintenance.
Article
Construction & Building Technology
Asieh Davoodi, Mohsen Aboutalebi Esfahani, Meysam Bayat, Seyed Esmaeil Mohammadyan-Yasouj
Summary: The study found that 0.5% to 1% NS can prevent fluidity loss and increase drying shrinkage in the matrix. Three of the best performing mortars were evaluated, with the optimum mixture being NS1-RP5 containing 1% NS and 5% RP. This mixture exhibited the best performance and mechanical properties with an elastic modulus loss of about 20%.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Environmental Studies
Rosa Veropalumbo, Cristina Oreto, Nunzio Viscione, Salvatore Antonio Biancardo, Francesca Russo
Summary: This study investigates the potential production of sustainable asphalt mastics using recycled solid waste. The results show that the use of jet grouting waste as filler in asphalt mastics improves rigidity, elasticity, and resistance to permanent deformation compared to traditional limestone filler. Additionally, the use of jet grouting waste and shredded waste plastic as filler in asphalt mastics reduces environmental impacts, such as terrestrial ecotoxicity, freshwater eutrophication, global warming, and fossil resource scarcity.
ENVIRONMENTAL IMPACT ASSESSMENT REVIEW
(2022)
Review
Chemistry, Physical
Muhammad Imran Khan, Muslich Hartadi Sutanto, Nur Izzi Md. Yusoff, Salah E. Zoorob, Waqas Rafiq, Mujahid Ali, Roman Fediuk, Nikolai Ivanovich Vatin
Summary: This review study presents and summarizes the effects of different compositions of cementitious grouts on the performance of semi-flexible layers. The influence of byproducts and other admixtures/additives on the mechanical properties of grouts is also discussed. Recommendations on the composition of cementitious grouts are provided.
Article
Chemistry, Physical
Teyba Wedajo Mahdi, Sanjaya Senadheera, Tewodros Ghebrab
Summary: The performance of asphalt binder reinforced with waste plastic polyethylene terephthalate (PET) was investigated, and it was found that the size, mix mechanism, and mix temperature of PET significantly influenced the physical properties and penetration index (PI) of the asphalt binder.
Article
Chemistry, Physical
Lingxiang Kong, Ling Xu, Yinfei Du, Jiao Jin, Giuseppe Loprencipe, Laura Moretti
Summary: This study proposed a new method to cool asphalt pavements by incorporating a hybrid mineral filler (HMF) with high emissivity into a reference asphalt mixture. The results showed that HMF increased the emissivity and rutting resistance of the asphalt mastic, and enhanced the thermal conductivity of the asphalt mixture. The combined effect of high emissivity and thermal conductivity led to a lower surface temperature in the tests.
Article
Engineering, Environmental
Mohammadjavad Kazemi, Elham H. Fini
Summary: There is an increased demand for durable and sustainable construction materials to improve the long-term performance of buildings and infrastructure. Polymer modification is a well-known method for enhancing the properties of construction materials, but the low compatibility between construction materials and polymers, especially from waste plastics and rubbers, has limited its effectiveness. This paper reviews studies on polymer functionalization to improve compatibility specifically for thermoplastic and thermosetting polymers, examining how it enhances the properties of construction materials.
RESOURCES CONSERVATION AND RECYCLING
(2022)
Article
Chemistry, Physical
Wei Jiang, Dongdong Yuan, Aimin Sha, Yue Huang, Jinhuan Shan, Pengfei Li
Summary: The ASP pavement utilizes SMA as the surface layer, with steel plate and plastic materials as main load-bearing layers, and a GFRP insulation layer, showing good mechanical properties and fatigue resistance. It has advantages in construction efficiency, environmental impact, and recyclability, making it worth further research and promotion.
Article
Engineering, Environmental
Yui Kawasaki, Sayaka Nagao-Sato, Misa Shimpo, Kahori Fujisaki, Emi Yoshii, Rie Akamatsu, Petra Warschburger
Summary: This study qualitatively describes sustainable dietary behaviors (SDBs) that Japanese and German adults can implement in their lives, and quantitatively compares the similarities and differences in understanding SDBs between the two samples. The study found that Japanese participants were more focused on food waste prevention, while German participants were more focused on solving environmental problems.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Kechun Chen, Yuan Ding, Liming Yang, Zhihao Wang, Haoxuan Yu, Difan Fang, Yufa Feng, Liying Hu, Chenxi Xu, Penghui Shao, Xubiao Luo, Liang Chen
Summary: This study proposes a targeted repair scheme for the recovery of graphite anodes from spent LIBs by systematically characterizing and analyzing the structure and composition of spent graphite (SG). The results show that the repair scheme achieves effective SG repair and the repaired graphite anode displays excellent lithium storage performance.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Takao Ueda, Shigeki Koyanaka, Tatsuya Oki
Summary: Fires caused by accidental crushing of batteries are a serious issue in the e-waste recycling process. A new in-line sorting system that uses X-ray scanning and deep learning has been developed to accurately detect batteries. Through a validation study, the system achieved higher accuracy compared to other existing programs.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Hannes Geist, Frank Balle
Summary: Research on circular economy often lacks empirical data, especially in the theory of circular process design and design for remanufacturing. This study systematically collected and analyzed engineering data on seven remanufacturing processes in the European automotive remanufacturing industry for the first time, providing empirical support for circular engineering challenges, potentials, and solutions.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Xiaojing Li, Fan Lue, Nanlin Liao, Hua Zhang, Na Yang, Pinjing He
Summary: This study assesses and predicts the greenhouse gas emissions on the timeline as waste treatment technologies develop in Shanghai from 1991 to 2025 using the Life Cycle Assessment (LCA) methodology. The findings demonstrate that GHG emission has reached net-zero in 2019 owing to the application of alternative technologies and waste segregation.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Bingchun Liu, Haoyang Wang, Xiaoqin Liang, Yibo Wang, Zijie Feng
Summary: The expansion of the photovoltaic market has resulted in a significant increase in PV waste. Therefore, conducting scientific research to determine the importance of the circular economy for sustainable growth in the PV industry is essential. The study demonstrates that accurate prediction of PV installed capacity and quantifying the importance of recycling in balancing the supply and demand of raw materials can be achieved through a multi-factor installed capacity prediction model and recovery potential prediction.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Review
Engineering, Environmental
Chuanzhen Zhang, Baojing Gu, Xia Liang, Shu Kee Lam, Yi Zhou, Deli Chen
Summary: Reactive nitrogen is crucial for agriculture and human nutrition, but mismanagement can have detrimental effects on human health and ecosystem services, hindering the achievement of the 2030 Sustainable Development Goals. Progress towards nitrogen-related targets varies across countries, highlighting the need for integrated management to achieve overall synergies.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Alessandro Gatto, Marijke Kuiper, Corina van Middelaar, Hans van Meijl
Summary: This study examines the economic and environmental effects of transitioning towards more circular food systems in the European Union (EU27) by feeding animals with low-opportunity-cost feed and better utilizing local feed resources. The results show that providing subsidies for circularity and promoting the use of low-cost feed can increase animal production, but also have negative impacts on land use and emissions. On the other hand, promoting domestic feed sourcing through import tariffs can decrease animal production and greenhouse gas emissions in agriculture. However, complementary policies are needed to mitigate drawbacks and enhance benefits of a more circular agri-food system.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Jinbo Zhang, Liu Chen, Yulei Xie, Pingjian Yang, Zheng Li, Huaicheng Guo, Yang Zhang, Lirong Liu
Summary: This study examines the impact of carbon taxes on low-carbon development and climate change mitigation. By constructing a cross-system bi-layer model, the study finds that reasonable carbon taxes can promote the stability of the energy network, reduce carbon emissions and air pollutants, and optimize production efficiency and the structure of the energy system. This study contributes to a better understanding of the effects and implementation pathways of carbon taxes.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Konstantin Born, Mehmet Metehan Ciftci
Summary: Increasing recycling of metals is important for reducing reliance on mining, but it cannot fully meet future metal demand. Primary production of metals is expected to continue rising, highlighting the need for alternative circular economy strategies such as demand reduction and mitigating harmful impacts of primary metal production.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Yinqiu Ma, Lin Huang, Jiahui Li, Wei Cao, Yumei Cai
Summary: Afforestation and reforestation, such as China's Grain for Green Program, have shown to effectively mitigate greenhouse gas emissions and contribute to carbon sink capacity. This study highlights the significant carbon potential of the program and its potential application in other countries to reduce CO2 in the atmosphere.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Arlind Dervishaj, Kjartan Gudmundsson
Summary: This paper reviews digital tools for supporting the Circular Economy (CE) in the built environment and provides suggestions. The study identifies limitations in the functionalities of current tools, including a lack of representative data for LCA and underdeveloped circularity indicators. Further development is needed in terms of interoperability aspects, integration of more sources of data for LCA and circularity, and possibilities for a comprehensive evaluation of design choices.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Mohamadreza Y. Azarfam, Anuj Maheshwari, Frank D. Blum, Siddhesh Chaudhari, Clinton Switzer, Ranji Vaidyanathan, Jay C. Hanan, Sudheer Bandla
Summary: This study introduces a feasible method for manufacturing recycled composites using post-consumer carpets and recycled resin. The resulting composites have impressive strength and modulus, surpassing commercial thermoplastics and making them suitable for structural applications. This research presents a promising approach to address carpet landfilling and reduce reliance on additives.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Pujiang Shi, Tianle Huang, Hong Kit Lim, Chiew Kei Tan, Jong-Min Lee, Chor Yong Tay
Summary: This study developed a highly porous bioadaptive 3D sponge-like construct from plastic materials in discarded keyboards for advanced in vitro applications. The findings demonstrate the potential of using discarded keyboards as a waste-to-resource feedstock to achieve waste reduction and maximize value-capture.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Kuo-Jui Wu, Hailing Qiu, Caiyan Huang, Anthony S. F. Chiu, Ming-Lang Tseng
Summary: Government resource allocation practices for achieving carbon neutrality should be guided by dynamic system theory to identify potential dynamics. Carbon intensity control dynamics have a significant influence on other dynamics.
RESOURCES CONSERVATION AND RECYCLING
(2024)