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Advances in Concrete and Binders for Sustainable Engineering
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Advances in Concrete and Binders for Sustainable Engineering

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Construction and Building Materials".

Deadline for manuscript submissions: 20 June 2024 | Viewed by 563

Special Issue Editors

Prof. Dr. Mónica López-Alonso

E-Mail Website
Guest Editor
Department of Construction Engineering and Projects, University of Granada, 18071 Granada, Spain
Interests: recycled materials; eco-efficient concrete; recycled aggregates; waste and by-products; sustainable construction; cement-based materials; health and safety at work; construction risk prevention
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Alessandra Bonoli

E-Mail Website
Guest Editor
Department of Civil, Chemical, Environmental and Materials Engineering (DICAM), Alma Mater Studiorum—Università di Bologna, 40131 Bologna, Italy
Interests: sustainability in building and construction; waste recycling; circular economy; life cycle assessment
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Francisco Agrela

E-Mail Website
Guest Editor
Area of Construction Engineering, University of Cordoba, 14071 Córdoba, Spain
Interests: sustainable construction; recycled materials; life cycle assessment; waste and byproduct application; recycled aggregate cement-based materials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The management of different industrial waste and by-products, such as recycled aggregates from construction and demolition waste, alumina by-products, biomass ash, and olive stone or reinforcing fibers, as well as the reduction of landfill deposits by incorporating these products in a second life cycle, is the aim of this work.

Over the last two decades, the application of these materials as mixed recycled aggregates or recycled concrete aggregates in engineering works has been studied intensively.

Additionally, the application of some of these by-products in the production of concrete has been the subject of numerous investigations, with the aim of applying these types of materials as a supplementary cementing material, limestone filler, or as a replacement for natural aggregates.

To summarize, sustainable construction materials can reduce the number of constitutive elements of concrete required for civil construction as well as be a viable material for road pavement base layers.

For this reason, this Special Issue presents current research that is applicable for engineering projects, with a focus on the use of efficient materials in some stages of the life cycle in order to improve the reduction in CO2 demand.

Prof. Dr. Mónica López-Alonso
Prof. Dr. Alessandra Bonoli
Prof. Dr. Francisco Agrela
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. Materials 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 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

  • sustainability
  • eco-efficiency
  • advanced materials
  • road pavements
  • concrete
  • environmental
  • life cycle analysis
  • aggregates
  • supplementary cementitious materials
  • civil engineering

Published Papers (1 paper)

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Research

18 pages, 1444 KiB  
Article
Effect of Recycled Fine Aggregates on the Mechanical and Drying Shrinkage Properties of Alkali-Activated Recycled Concrete
by Ling Luo, Wu Yao and Gang Liao
Materials 2024, 17(9), 2102; https://0-doi-org.brum.beds.ac.uk/10.3390/ma17092102 - 29 Apr 2024
Viewed by 208
Abstract
In this paper, the workability, mechanical, ion leaching, and drying shrinkage properties of alkali-activated concrete with recycled coarse and fine aggregates were studied, and the pore structure and micro-morphology of different alkali-activated recycled aggregate concretes (AARACs) were characterized by using the mercury intrusion [...] Read more.
In this paper, the workability, mechanical, ion leaching, and drying shrinkage properties of alkali-activated concrete with recycled coarse and fine aggregates were studied, and the pore structure and micro-morphology of different alkali-activated recycled aggregate concretes (AARACs) were characterized by using the mercury intrusion method and scanning electron microscopy, respectively. The experimental results showed that with the increase in the replacement rate of the recycled fine aggregate (RFA), the flowability showed a decreasing trend. Adding a certain amount of RFA improves the mechanical properties of the AARAC. The compressive strength at a curing age of 28 days was 65.3 MPa with 70 wt% RFA replacement. When the replacement rate of the RFA was 100 wt%, the maximum splitting tensile strength (4.5 MPa) was obtained at a curing age of 7 days. However, the addition of the RFA had little effect on the flexural strength of the AARAC. As an extension of the curing age, the splitting tensile strength, flexural strength, tension-to-compression ratio, and flexure-to-compression ratio all showed an increasing trend at first and then a decreasing trend. At a curing age of 7 days, the tension-to-compression ratio and flexure-to-compression ratio were both high (except for those of R100), indicating that the ductility and toughness of the specimen were improved. The addition of the RFA increased the drying shrinkage of the AARAC. At a curing age of 120 days, compared to the specimen without the RFA, the drying shrinkage rate of the specimen with the addition of 70 wt% RFA increased by 34.15%. As the curing age increased, the microstructure of the reaction products became denser, but the proportion of large-diameter pores increased. This study evaluated the application of RFA in AARAC. The experimental results showed that the RFA-based AARAC had acceptable mechanical and durability properties. Full article
(This article belongs to the Special Issue Advances in Concrete and Binders for Sustainable Engineering)
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