Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
6.8
3.3
Journals
Sustainability
Special Issues
Complex Solid Waste and Multipath Recycling
sustainability-logo
Submit to Sustainability Review for Sustainability Propose a Special Issue

Journal Menu

► Journal Menu

Journal Browser

► Journal Browser
share announcement

Complex Solid Waste and Multipath Recycling

A special issue of Sustainability (ISSN 2071-1050). This special issue belongs to the section "Waste and Recycling".

Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 8642

Special Issue Editors

Dr. Qiong Liu

E-Mail Website
Guest Editor
1. Department of Civil Engineering, Tongji University, Shanghai 200092, China
2. School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
Interests: recycled concrete; recycled powder; composite admixture; construction and demolished waste; decoration solid waste
Prof. Dr. Bin Lei

E-Mail Website
Guest Editor
School of Infrastructure Engineering, Nanchang University, Nanchang 330031, China
Interests: recycled aggregate concrete; durability of concrete; properties of asphalt concrete
Special Issues, Collections and Topics in MDPI journals
Dr. Changqing Wang

E-Mail Website
Guest Editor
School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
Interests: sustainable concrete; recycling technology; recycled materials; recycled concrete
Special Issues, Collections and Topics in MDPI journals
Dr. Jingwei Ying

E-Mail Website
Guest Editor
School of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China
Interests: recycled concrete; concrete durability; nano modified cement-based materials.

Special Issue Information

Dear Colleagues,

The resourceful treatment of solid waste is a key factor in realizing sustainable urban development. The world produces between 7 and 10 billion tons of urban solid trash each year, comprising construction and demolition waste, municipal solid waste, commercial and industrial waste, etc. The chaotic dumping and landfilling of solid waste is a dissipation of "urban mines", which may result in secondary pollution.

Therefore, the aim of this Special Issue is to publish research on urban solid waste recycling, as well as the related life circle analysis and carbon footprint. Understanding the recycling methods of various solid wastes is essential for sustainable development.

Numerous researchers have concentrated their efforts on the resource exploitation of solid waste and have produced productive outcomes. Recent years have seen an increase in the complexity of urban solid waste, which has benefitted from advances in material science and presents an obstacle to recycling. A wide range of paths for recycling and regenerating solid waste have been developed, posing both obstacles and opportunities for urban solid waste recycling.

In this Special Issue, original research articles and reviews are welcome. Research areas may include (but are not limited to) the following: construction and demolished waste, decoration solid waste, industrial solid waste, garbage sorting, crushing/grinding analysis, recycled coarse aggregate, recycled fine aggregate, recycled powder, composite admixture, recycled cement, recycled concrete, recycled concrete structures, renewable plastic, renewable wood, life circle analysis, carbon storage, carbon utilization, and carbon footprints.

Dr. Qiong Liu
Prof. Dr. Bin Lei
Dr. Changqing Wang
Dr. Jingwei Ying
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Sustainability is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • construction and demolished waste
  • decoration solid waste
  • garbage sorting
  • recycled aggregate
  • recycled powder
  • renewable plastic
  • renewable wood
  • life circle analysis
  • carbon footprint

Published Papers (5 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

14 pages, 2397 KiB  
Article
Studying Thermal and Mechanical Properties of Recycled Concrete by Using Ceramic Aggregate
by Yumei Wang, Jinyan Wang, Zhiheng Deng and Jianzhuang Xiao
Sustainability 2023, 15(3), 2642; https://doi.org/10.3390/su15032642 - 1 Feb 2023
Cited by 2 | Viewed by 1877
Abstract
Ceramic aggregate has the characteristics of light weight, heat insulation, and low cost, and recycled aggregate is a type of green material that realizes the re-crushing of construction waste. This paper studied the impact of replacing natural coarse aggregate with ceramic aggregate and [...] Read more.
Ceramic aggregate has the characteristics of light weight, heat insulation, and low cost, and recycled aggregate is a type of green material that realizes the re-crushing of construction waste. This paper studied the impact of replacing natural coarse aggregate with ceramic aggregate and natural sand with recycled fine aggregate, on the physical, mechanical, and thermal properties of concrete. Recycled fine aggregate was used to completely replace natural sand. A total of five concrete mixes (including a reference mix) were prepared with different levels of ceramic aggregate (0%, 30%, 50%, 70%, 100%). Density, compressive strength, thermal conductivity, and thermal inertia index were measured to evaluate the performance of each mixture, and ceramic concrete board and hollow blocks were designed for testing the thermal properties. Results of testing show that density, strength, and thermal performance are interrelated. The smaller the density, the lower the strength, and it indicates that ceramic aggregate has a negative influence on strength in concrete. Meanwhile, the smaller the density, the higher the thermal resistance, and the addition of ceramic aggregate can improve the thermal insulation of concrete. The mechanical and thermal properties are both affected by the ceramic replacement ratio. Ceramic aggregate improves the thermal properties of recycled concrete, and the negative influence of ceramic aggregate on compressive strength can be controlled by the replacement ratio of aggregate in concrete. Based on the overall comparison and analysis, a mix with 50% ceramic aggregate shows relatively better strength and thermal insulation compared to other mixes. The use of ceramic aggregate in combination with recycled fine aggregate can effectively reduce the environmental pollution and make an economical substitute for their natural counterparts. Full article
(This article belongs to the Special Issue Complex Solid Waste and Multipath Recycling)
►▼ Show Figures

Figure 1

17 pages, 6220 KiB  
Article
Evolution of Electrochemical Impedance Spectra Characteristics of Cementitious Materials after Capturing Carbon Dioxide
by Qiong Liu, Huilin Tang, Lin Chi, Kailun Chen, Lei Zhang and Chaoxiong Lu
Sustainability 2023, 15(3), 2460; https://doi.org/10.3390/su15032460 - 30 Jan 2023
Cited by 5 | Viewed by 1476
Abstract
The electrochemical parameters of cement-based materials with different water–cement ratios in carbon curing and water curing were measured with electrochemical impedance spectroscopy (EIS). The optimized circuit model and corresponding electrical parameters were obtained to illustrate the variation of the microstructure of cementitious materials [...] Read more.
The electrochemical parameters of cement-based materials with different water–cement ratios in carbon curing and water curing were measured with electrochemical impedance spectroscopy (EIS). The optimized circuit model and corresponding electrical parameters were obtained to illustrate the variation of the microstructure of cementitious materials after carbon capturing. The results show that, to a large extent, the semicircle diameter in the high frequency area gradually increased along with carbon curing and water curing. However, carbon curing showed a difference that the semicircle diameter in the high frequency appeared at the minimal value at 3 days, which was higher than that at 1 day and 7 days. This should be the result of the joint influence of water content and porosity in the cement matrix. It was also found that the mass increase rates of carbonation with water–cement ratios of 0.4, 0.5, and 0.6 were basically stable at 3.4%, 5.0%, and 5.5%, respectively. The electrochemical parameters ρct2 of cement mortar corresponding to carbon curing were around three times that of water curing specimens, mainly due to the reduction of soluble materials and refinement of connecting pores in the microstructure of cementitious materials. A quadratic function correlation between the mass increase rate and ρct2 in the carbonation process of cement mortar was built, which proved that EIS analysis could be applied to monitor the carbon capturing of cement-based materials, either for newly mixed concrete or for recycled concrete aggregates. Full article
(This article belongs to the Special Issue Complex Solid Waste and Multipath Recycling)
►▼ Show Figures

Figure 1

14 pages, 6367 KiB  
Article
Preparation of Mullite/PU Nanocomposites by Double Waste Co-Recycling
by Xiaohua Gu, Yanwei Zhu, Siwen Liu, Shangwen Zhu and Yan Liu
Sustainability 2022, 14(21), 14310; https://doi.org/10.3390/su142114310 - 2 Nov 2022
Cited by 3 | Viewed by 1285
Abstract
The massive accumulation of industrial waste has become an environmental problem that is very difficult to deal with. In this paper, mullite whisker nanomaterials were developed independently using industrial waste residues, which were used to degrade polyurethane (PU) solid waste by alcoholysis with [...] Read more.
The massive accumulation of industrial waste has become an environmental problem that is very difficult to deal with. In this paper, mullite whisker nanomaterials were developed independently using industrial waste residues, which were used to degrade polyurethane (PU) solid waste by alcoholysis with ethylene glycol (EG) and ethanolamine (ETA) bi-component, and mullite modified regenerated polyol materials were obtained by double waste synergistic recycling. Mullite/PU foam nanocomposites were prepared by one-step foaming. The analysis of the test results shows that, at EG/ETA = 2:1 and mullite whisker addition of 0.15%, the regenerated rigid PU foam obtained has low thermal conductivity and higher compressive strength, at which time the regenerated PU foam has the best performance. The FTIR test results show that the silanol of mullite reacts with isocyanate during foaming and is attached to the polyurethane chain, such that the compressive strength and thermal insulation properties are maximized. It provides a new way to create a “double waste synergy” for preparing high-value materials by comprehensively utilizing resources. Full article
(This article belongs to the Special Issue Complex Solid Waste and Multipath Recycling)
►▼ Show Figures

Figure 1

16 pages, 28137 KiB  
Article
Crack Propagation and Failure Mechanism of Modeled Recycled Concrete under Shear Stress
by Shijun Wang, Shengjiang Peng, Chang Sun, Amardeep Singh, Ziyun Cheng and Yunfei Tian
Sustainability 2022, 14(9), 5552; https://doi.org/10.3390/su14095552 - 5 May 2022
Viewed by 1323
Abstract
In this study, the failure processes of modeled concrete specimens under shear force were studied. To investigate the cracks propagation and failure modes, modeled natural aggregate, modeled recycled aggregate, and modeled brick aggregate were used as coarse aggregate in the modeled concrete. Through [...] Read more.
In this study, the failure processes of modeled concrete specimens under shear force were studied. To investigate the cracks propagation and failure modes, modeled natural aggregate, modeled recycled aggregate, and modeled brick aggregate were used as coarse aggregate in the modeled concrete. Through digital image correlation (DIC) technology, the displacement field and strain field could be obtained by analyzing the change of the speckle position on the surface of the specimens. It was found that the shear strength of the modeled natural concrete (MNC) was the highest, the modeled recycled concrete (MRC) was the second, and the modeled brick aggregate concrete (MBC) was the lowest and only half of that of MNC. The shear crack of the MNC first appeared at the interface transition zone (ITZ) and propagated, resulting in the shear failure. The shear crack of MRC first appeared in the new ITZ and then expanded to the old ITZ. The shear crack of MBC extended through the brick aggregate. The study also found that, along with the compressive stress trace range, the MNC and the MRC have four vertical compressive strain concentration zones, while the MBC has only two strain concentration zones, which should result from the fact that the elastic modulus of the brick aggregate is lower than the surrounding hardened mortar. Therefore, there are no compressive strain concentration zones near the brick aggregate. Full article
(This article belongs to the Special Issue Complex Solid Waste and Multipath Recycling)
►▼ Show Figures

Figure 1

14 pages, 2729 KiB  
Article
Utilization of Different Grain Size of Municipal Solid Waste Bottom Ash in High-Performance Mortars
by Xiongwei Li, Yanwei Guo, Rahul Sharma, Amardeep Singh, Hao Zhang, Jiarui Zhang and Yu Fu
Sustainability 2022, 14(7), 4263; https://doi.org/10.3390/su14074263 - 3 Apr 2022
Cited by 5 | Viewed by 1795
Abstract
Globalization is bringing increased industrialization and municipal solid waste (MSW). This is a major concern in heavily populated areas. In order to reduce MSW generation, incineration is commonly used, resulting in two types of ashes: bottom and fly ash. Bottom ash is gathered [...] Read more.
Globalization is bringing increased industrialization and municipal solid waste (MSW). This is a major concern in heavily populated areas. In order to reduce MSW generation, incineration is commonly used, resulting in two types of ashes: bottom and fly ash. Bottom ash is gathered at the incineration bed and is larger in mass than fly ash. To test the qualities of high-performance mortar, MSW-BA in three sizes (fine, medium, and coarse) was replaced with sand at three replacement levels of 10%, 20%, and 30%. The high-performance mortar integrating MSW-BA was tested for hardened density, mechanical properties such as compressive and flexural strength, resistance to NaOH solution, and heavy metal leaching. The substitution level of MSW-BA increased the hardened density of the mortar mixes. The volume change and residual strength of the mortar mixes were measured following exposure to the NaOH solution. Fine-particle mortar mixes shrank whereas medium- and coarse-particle mortar mixes expanded. The largest loss in flexural and compressive strength was recorded when 20% of sand was replaced with a fine fraction of MSW-BA. Heavy metals including cadmium and copper were not leached from MSW-BA combinations of any size. The minuscule amounts of lead and zinc discovered were well below acceptable limits. The present study illustrates the MSW-BA can be utilized as a substitute for sand in the development of high-performance mortar. Full article
(This article belongs to the Special Issue Complex Solid Waste and Multipath Recycling)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-5
Back to TopTop