Special Issue "Recycled Concrete Towards a Sustainable Society"

Submission Deadline: 31 August 2021
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Guest Editors
Jianzhuang Xiao , Professor, School of civil engineering, Tongji University, China.

Dr. Jianzhuang Xiao is the winner of National Outstanding Youth Fund, Humboldt Scholar of Germany, chairman of RILEM International Committee on structural behavior and innovation of recycled concrete, deputy chairman of Sustainable Civil Engineering Research Committee and chairman of Recycled Concrete Academic Exchange Committee. He is also editor of several national and industrial standards, author of 3 books and of more than 100 publications in refereed journals, and as editor or reviewer of many SCI journals. He is specialized in material behavior and structural performance of recycled aggregate concrete, fire response and resistance of high-performance concrete structures, rehabilitation and strengthening with composite material and committed to basic research and industrial innovation of solid waste recycling in recent years.


Summary

The shortage of concrete materials has become increasingly prominent in the building industry. Waste concrete recycling is an effective way to overcome this resource shortage, which attracts the most interest from researchers to builders. Therefore, significant researches have been conducted, and some recycling techniques have been successfully applied in engineering projects. However, the high efficiency and full utilization of waste building materials still require significant research and innovation.


This Special Issue “Recycled Concrete Towards a Sustainable Society” mainly focuses on the current research progress of the recycled aggregate and concrete. It will cover the aspects of the experimental and theoretical innovation related to the recycled coarse aggregate concrete, recycled fine aggregate concrete, recycled powder concrete, recycled brick aggregate concrete, spoil recycled material and new-type recycled concrete etc. The scope of interests includes but is not limited to the following topics: 

(1) Waste concrete crushing and recycled aggregate production technologies;

(2) The basic performance and degradation mechanism of recycled aggregate;

(3) The strength and constitutive relationship of recycled concrete;

(4) The durability of recycled concrete;

(5) The performance improvement technology and mix proportion design method of recycled concrete;

(6) The seismic performance and design method of recycled concrete;

(7) New-type recycled concrete and structures (full regeneration recycled concrete, 3D printed recycled concrete, composite recycled concrete structure, removable structures, etc.);

(8) Recycled concrete products.


Keywords
Recycled concrete; Recycled aggregate; Material properties; Concrete structure; Mechanical properties; Durability; Production and application

Published Papers
  • Utilization of Recycled Concrete Powder in Cement Composite: Strength, Microstructure and Hydration Characteristics
  • Abstract Recycled concrete powder (RCP) is used more and more in cement-based materials, but its influence on the hydration process is still unclear. Therefore, this paper studied the influence of recycled concrete powder (RCP) on the hydration process of cement and provides a theoretical basis for the hydration mechanism of cement composite materials. The hydration heat method was used to systematically analyze the thermal evolution process of cement paste with or without RCP. Hydration products were identified using X-ray diffraction (XRD) and thermal analysis (TG–DSC). The pore structure change of cement pastes was analyzed by mercury intrusion porosimetry (MIP) method. The… More
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  • Study on Carbonation Damage Constitutive Curve and Microscopic Damage Mechanism of Tailing Recycled Concrete
  • Abstract To improve the resource utilization of recycled aggregate concrete (RAC) and make use of the unique pozzolanic activation characteristics of iron ore tailing (IOT), the constitutive curves of tailing recycled concrete (TRC) before and after carbonization were analyzed theoretically, experimentally and microscopically. Firstly, according to the experimental data, the damage constitutive and related damage parameters of TRC were theoretically established by Weibull probability distribution function. Secondly, the comprehensive damage parameter b under different working conditions was studied. Finally, the damage mechanism was formed by EDS and SEM. The results showed that the damage constitutive model based on Weibull probability distribution… More
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  • Crack Propagation and Failure Characteristics of Modeled Concrete with Natural and Brick Aggregates
  • Abstract The failure characteristics of recycled concrete containing brick aggregates are still indistinct, especially how the angular aggregates effect the crack propagation. Based on the concept of modeled concrete, the development of cracks in concrete containing the natural aggregate and brick aggregate under a compression loading was studied. The strain distribution was analyzed with the Digital Image Correlation (DIC). The modeled aggregates include circular and squared ones, and the squared modeled aggregates were placed in different orientations, including 0°, 22.5° and 45°. The results show that when the aggregate is placed at 45°, the upper and lower vertices of the aggregate… More
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  • Experimental and Theoretical Study on the Flexural Behavior of Recycled Concrete Beams Reinforced with GFRP Bars
  • Abstract This paper experimentally investigated the flexural behavior of reinforced recycled aggregate concrete (RAC) beams reinforced with glass fiber-reinforced polymer (GFRP) bars. A total of twelve beams were built and tested up to failure under four-point bending. The main parameters were reinforcement ratio (0.38%, 0.60%, and 1.17%), recycled aggregate replacement ratio (R = 0, 50%, and 100%) and longitudinal reinforcement types (GFRP and steel). The flexural capacity, failure modes, flexibility deformation, reinforcement strains and crack distribution of the tested beams were investigated and compared with the calculation models of American code ACI 440.1-R-15, Canadian code CSA S806-12 and ISIS-M03-07. The tested… More
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  • Bond Behavior between BFRP Bars and Hybrid Fiber Recycled Aggregate Concrete after High Temperature
  • Abstract The aim of this study is to improve the bond performance of basalt fiber reinforced polymer (BFRP) bars and recycled aggregate concrete (RAC) after being exposed to high temperatures. The bond behavior (failure modes, bond strength, bond stress-slip curves) between BFRP bars and hybrid fiber recycled aggregate concrete (HFRAC) after being exposed to temperatures ranging from 20°C up to 500°C was studied by using pull-out tests. The effect of high temperatures on mechanical properties of concrete (compressive strength, splitting tensile strength) and tensile strength of BFRP bars was also investigated. The bond strength decreased as the temperature increased and the… More
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