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Sustainable Development: Recycling and Reuse of Waste Materials in the...
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Sustainable Development: Recycling and Reuse of Waste Materials in the Construction Industry—2nd Edition

A special issue of Buildings (ISSN 2075-5309). This special issue belongs to the section "Building Materials, and Repair & Renovation".

Deadline for manuscript submissions: 10 March 2025 | Viewed by 1972

Special Issue Editor

Dr. Zengfeng Zhao

E-Mail Website
Guest Editor
Department of Structural Engineering, College of Civil Engineering, Tongji University, Shanghai 200092 , China
Interests: recycled aggregates; construction and demolition wastes; durability of concrete; sustainable cementitious materials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Buildings and other structures are responsible for nearly 40% of total direct and indirect CO2 emissions in the world. With the rapid development of the construction industry, increasing amounts of construction and demolition waste (CDW) are generated annually, while high-quality construction materials are in short supply. Presently, only a small proportion of CDW is reused and recycled in the construction industry. Components of CDW typically include concrete, wood, gypsum, asphalt, bricks, and other waste materials such as excavated soil and engineering slurry. Much of these waste materials could be recycled within the construction industry to decrease the amounts of waste which needs to be disposed in landfills, thus preserving natural resources. Meanwhile, structurally useful elements could also be reused for the production of new building materials.

This Special Issue aims to present the latest achievements in the field of the valorization of waste materials in the construction industry to decrease their environmental impact. Particular focus will be placed on the latest original scientific research and industrial applications. I invite you to submit interesting articles covering these topics and interdisciplinary articles are also very welcome.

Please do not hesitate to contact me with any questions that you may have about this Special Issue.

Dr. Zengfeng Zhao
Guest Editor

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. Buildings is an international peer-reviewed open access monthly 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 2600 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

  • recycled aggregates and sustainability
  • construction and demolition wastes
  • 3D printing concrete containing recycled materials
  • sustainable cementitious materials based on waste materials
  • life cycle assessment of concrete using recycled materials
  • recycled aggregates and sustainability
  • construction and demolition waste；

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Related Special Issue

Published Papers (3 papers)

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Research

22 pages, 54621 KiB  
Article
Experimental Study on the Mechanical Properties of Metallurgical Slag Aggregate Concrete and Artificial Aggregate Concrete
by Xueyuan Zhang, Meiling Gao, Daoming Zhang, Biao Zhang and Mengyao Wang
Buildings 2024, 14(8), 2548; https://doi.org/10.3390/buildings14082548 - 19 Aug 2024
Viewed by 327
Abstract
Three types of aggregate, including metallurgical slag aggregate (steel slag, copper slag, and iron sand), rare earth porcelain sand (REPS) aggregate as artificial aggregate, and recycled aggregate, were selected to produce concrete with the same basic mixture proportions in order to investigate the [...] Read more.
Three types of aggregate, including metallurgical slag aggregate (steel slag, copper slag, and iron sand), rare earth porcelain sand (REPS) aggregate as artificial aggregate, and recycled aggregate, were selected to produce concrete with the same basic mixture proportions in order to investigate the influence of aggregate types and aggregate replacement rates on their mechanical properties. Three levels of aggregate replacement rate—20%, 35%, and 50% for coarse aggregate (CA) and 20%, 30%, and 40% for fine aggregate (FA)—were employed in this study. The results indicate that replacing natural sand with metallurgical slag aggregate as FA enhances the mechanical properties of concrete. Among these, iron sand (IS) shows superior enhancement effects compared with copper slag (CS), and CS outperforms steel slag (SS). Specifically, at a 30% IS replacement rate, the compressive strength and splitting tensile strength of IS aggregate concrete are 32.8% and 35.6% higher than those of natural aggregate concrete, respectively. REPS used as CA demonstrates significant improvements in compressive strength, while REPS used as FA notably enhances splitting tensile strength. For recycled aggregate concrete with recycled coarse aggregate replacement rates of 35% and 50%, mechanical properties are effectively strengthened by incorporating CS as FA at a 30% replacement rate and REPS as CA at a 20% substitution ratio, respectively. Additionally, XRF and XRD techniques were employed to confirm aggregate composition and were combined with SEM and EDS techniques to analyze the concrete microstructure, clarifying the strengthening mechanisms of metallurgical and artificial aggregates on concrete. Full article
(This article belongs to the Special Issue Sustainable Development: Recycling and Reuse of Waste Materials in the Construction Industry—2nd Edition)
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20 pages, 6630 KiB  
Article
Behavior of Lightweight Self-Compacting Concrete with Recycled Tire Steel Fibers
by Abdullah Alabdulkarim, Ahmed K. El-Sayed, Abdulaziz S. Alsaif, Galal Fares and Abdulrahman M. Alhozaimy
Buildings 2024, 14(8), 2463; https://doi.org/10.3390/buildings14082463 - 9 Aug 2024
Viewed by 578
Abstract
The utilization of recycled materials in concrete technology has gained significant attention in recent years, promoting sustainability and resource conservation. This paper investigates the behavior of lightweight self-compacting concrete (LWSCC) with recycled tire steel fibers (RTSFs). The effects of RTSFs on the flowability [...] Read more.
The utilization of recycled materials in concrete technology has gained significant attention in recent years, promoting sustainability and resource conservation. This paper investigates the behavior of lightweight self-compacting concrete (LWSCC) with recycled tire steel fibers (RTSFs). The effects of RTSFs on the flowability of the composite material and its density were assessed. The mechanical properties of the developed material were examined and beam tests were performed, aiming to assess its feasibility for structural applications. The compressive and tensile strengths were determined to evaluate the mechanical properties of the developed concrete mixtures. The beam tests were conducted to assess the flexural behavior of the beam specimens. Three different steel fiber contents of 0, 0.5, and 1% volumetric fractions of concrete were used in this study. The test results indicate that incorporating the fibers did not negatively impact the flowability and density of the LWSCC mixtures. In addition, the use of RTSFs enhanced the tensile strength of the developed concrete mixtures, where fibrous concrete showed increases in the splitting tensile strength in the range of 38 to 76% over that of non-fibrous concrete. On the other hand, the compressive strength of the mixtures was not affected. The test beams with RTSFs exhibited improved flexural performance in terms of delaying and controlling cracking, enhancing ultimate load, and increasing ductility. Compared with the control non-fibrous beam, the increases in the cracking load, ultimate load, and ductility index were up to 63.8, 9.3, and 16%, respectively. The test results of the beams were compared with theoretical predictions, and good agreement was found. Full article
(This article belongs to the Special Issue Sustainable Development: Recycling and Reuse of Waste Materials in the Construction Industry—2nd Edition)
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16 pages, 5281 KiB  
Article
Influence of Nano-Silicon Dioxide in the Enhancement of Surface Structure of Public Filler and Properties of Recycled Mortar
by Ming Zhang, Chen Cheng, Kingsley Chiang, Xinxin Wang, Yazhi Zhu, Zengfeng Zhao and Hui Luo
Buildings 2024, 14(7), 2093; https://doi.org/10.3390/buildings14072093 - 8 Jul 2024
Viewed by 745
Abstract
This paper proposes a method of enhancing public filler (PF) with nano-SiO2 (NS) to prepare modified recycled aggregate mortar (RAM). The improvement effect of NS solution at different concentrations and immersion times on the macroscopic physical properties of recycled public fine aggregates [...] Read more.
This paper proposes a method of enhancing public filler (PF) with nano-SiO2 (NS) to prepare modified recycled aggregate mortar (RAM). The improvement effect of NS solution at different concentrations and immersion times on the macroscopic physical properties of recycled public fine aggregates (PFA) was investigated. Moreover, the effect of NS on the basic physical properties and durability of recycled mortar (RM) and the reinforcement mechanism of NS on recycled mortar was analyzed through various techniques. Results indicated that the modification effect of NS could remove loose cement mortar from the surface of PFA. It reacted with calcium hydroxide and calcite to generate nano-particles that could fill pores in PFA. The water absorption rate of PFA decreased to 9.3% when immersed in 2% NS solution for 72 h. There was no significant improvement in the mechanical properties of RM when the solution concentration and immersion time were increased. However, the compressive strength of RM prepared by modifying PFA with 2% NS was increased by about 21.9%, and the capillary water absorption and electric flux were reduced by 56.3% and 15.1%, respectively. Micro-analysis results showed that the volcanic ash effect of NS enabled it to react with Ca(OH)2 adhered to the surface of PFA, generating C-S-H and improving the interfacial bonding of PFA. Moreover, NS adsorbed on the surface of PFA dispersed into the freshly mixed cement slurry, which further enhanced the internal structure of PFA. Full article
(This article belongs to the Special Issue Sustainable Development: Recycling and Reuse of Waste Materials in the Construction Industry—2nd Edition)
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