Crumb Rubber Concrete and/or Other Eco-Sustainable Concrete

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Materials Science and Engineering".

Deadline for manuscript submissions: closed (18 February 2022) | Viewed by 5036

Special Issue Editors


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Guest Editor
School of Civil Engineering, Research Center of Large-Span Spatial Structures, Tianjin University, Tianjin 300350, China
Interests: fracture behavior; structural health monitoring and resilience; high-performance materials
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Guest Editor
Department of Structural, Geotechnical and Building Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin, Italy
Interests: nondestructive testing (NDT); acoustic emission; electromagnetic emission; critical phenomena in structural mechanics; critical phenomena in geophysics; fracture mechanics; static and dynamic analysis of high-rise buildings
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This is a new Special Issue of the journal Applied Sciences.

Due to the massive use of concrete in the world and as a sector that is expected to continuously grow, resource consumption and emissions of concrete have become an important issue. In this context, how to find higher-performance eco-sustainable concrete or solutions to reduce greenhouse gas emissions in the short and long term is particularly important—in particular, how to find a suitable eco-sustainable solution through comprehensive judgment by balancing social needs, environmental requirements and technical feasibility, among them crumb rubber concrete, recycled aggregate concrete, solid waste concrete, low carbon emission cementitious materials, and so on.

The aim of this Special Issue is to reunite researchers working in the field of concrete, from the micro scale to the macro scale. We expect that this issue will provide novel insights into the transition to sustainable use of concrete. Both experimental and numerical studies are welcome.

Prof. Dr. Jie Xu
Prof. Dr. Giuseppe Lacidogna
Guest Editors

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Keywords

  • crumb rubber concrete
  • eco-sustainable
  • low-carbon emission
  • cement composites
  • high-performance admixture
  • high-quality aggregate
  • nanomaterials
  • molecular dynamics
  • structural health monitoring

Published Papers (2 papers)

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15 pages, 17196 KiB  
Article
Experimental Evaluation of Recycled Aggregates, Washing Water and Cement Sludge Recovered from Returned Concrete
by Alessandra Diotti, Luca Cominoli, Giovanni Plizzari and Sabrina Sorlini
Appl. Sci. 2022, 12(1), 36; https://doi.org/10.3390/app12010036 - 21 Dec 2021
Cited by 4 | Viewed by 2834
Abstract
In this paper, a new innovative technology for the treatment of returned concrete is proposed. This method is based on the application of physical–mechanical processes that allow to obtain new quality products: recycled aggregates, microfiltered water and cement sludge. Specifically, by means of [...] Read more.
In this paper, a new innovative technology for the treatment of returned concrete is proposed. This method is based on the application of physical–mechanical processes that allow to obtain new quality products: recycled aggregates, microfiltered water and cement sludge. Specifically, by means of a mechanical system equipped with buffer and Archimedes screws, fine (d < 5 mm) and coarse (d > 5 mm) aggregates are obtained. The water coming from the washing process is sent to a microfiltration process, where a filter membrane separates the liquid phase (microfiltered water) from the solid phase (cement sludge) and no type of potentially toxic additive is added. In this context, this paper investigates the feasibility of using all these components as new raw materials for sustainable concrete production. In particular, according to the requirements imposed by technical standards, an experimental program was developed, aimed at evaluating the physical, chemical, and mechanical properties of the analyzed materials. The results showed that both recycled aggregates, the microfiltered water and the cement sludge can be used to produce new structural concrete. In particular, it was proven that also the cement sludge, which generally represents the most critical component destined for disposal, can be reused as filler in the partial replacement of sand. Full article
(This article belongs to the Special Issue Crumb Rubber Concrete and/or Other Eco-Sustainable Concrete)
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24 pages, 8042 KiB  
Article
Damage Pattern Recognition and Crack Propagation Prediction for Crumb Rubber Concrete Based on Acoustic Emission Techniques
by Jianjie Sun, Xi Chen, Zhengwu Fu and Giuseppe Lacidogna
Appl. Sci. 2021, 11(23), 11476; https://doi.org/10.3390/app112311476 - 03 Dec 2021
Cited by 8 | Viewed by 1606
Abstract
In this study, the clustering method of the concrete matrix rupture and rubber fracture damages as well as the prediction of the ultimate load of crumb rubber concrete using the acoustic emission (AE) technique were investigated. The loading environment of the specimens was [...] Read more.
In this study, the clustering method of the concrete matrix rupture and rubber fracture damages as well as the prediction of the ultimate load of crumb rubber concrete using the acoustic emission (AE) technique were investigated. The loading environment of the specimens was a four-point bending load. Six clustering methods including k-means, fuzzy c-means (FCM), self-organizing mapping (SOM), Gaussian mixture model (GMM), hierarchical model, and density peak clustering method were analyzed; the results illustrated that the density peak clustering has the best performance. Next, the optimal clustering algorithm was used to cluster AE signals so as to study the evolution behavior of different damage modes, and the ultimate load of crumb rubber concrete was predicted by an artificial neural network. The results indicated that the combination of AE techniques and appropriate clustering methods such as the density peak clustering method and the artificial neural network could be used as a practical tool for structural health monitoring of crumb rubber concrete. Full article
(This article belongs to the Special Issue Crumb Rubber Concrete and/or Other Eco-Sustainable Concrete)
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