Journal ArticleDOI
A Comprehensive Review on Recycled Aggregate and Recycled Aggregate Concrete
TLDR
In this paper, the authors provide a comprehensive review on recycled aggregate (RA) and recycled aggregate concrete (RAC) regarding their history, recycling, reuse and manufacture process, inherent defects (e.g. existing of additional interfacial transition zones in RAC), and materials properties.Abstract:
Using recycled aggregate s from construction and demolition waste can preserve natural aggregate resources, reduce demand of landfill, and contribute to sustainable built environment. This study provides a comprehensive review on recycled aggregate (RA) and recycled aggregate concrete (RAC) regarding their history, recycling, reuse and manufacture process, inherent defects (e.g. existing of additional interfacial transition zones in RAC), and materials properties. Specifically, these properties of RAC include fresh concrete workability, physical and chemical properties (i.e. density, carbonation depth, and chloride ion penetration), mechanical properties (i.e. compressive, flexural, and splitting tensile strength as well as elastic modulus), and long-term performance (i.e. freezing-thawing resistance, alkali-silica reaction resistance, creep, and dry shrinkage). On top of that, methods for improving RAC mechanical properties and long-term performance are summarized and categorized into three groups, i.e. (1) reduction of recycled aggregate porosity, (2) reduction of old mortar layer on recycled aggregate surface, and (3) property improvement without recycled aggregate modification (i.e. different concrete mixing design and addition of fibre reinforcement). Next, current regression-based models and artificial intelligence models on the prediction of compressive strength, modulus, and compressive stress-strain curves of RAC are reviewed and the ir limitations of those models are discussed. Furthermore, the state-of-the-art RAC applications are presented. Additionally, challenges of RAC application are reviewed taking China as an example. The link between material from CDW and EU green policy are discussed by analysing the previous research projects funded by European Commission. Finally, future perspectives of RAC research focus are discussed, i.e. development of “green” treatment methods on recycled aggregate s , further direction on nanoparticle application in RAC, and the establishment of database for RAC strength prediction.read more
Citations
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Journal ArticleDOI
Characterization of sustainable mortar containing high-quality recycled manufactured sand crushed from recycled coarse aggregate
TL;DR: In this paper , an innovative and viable approach is proposed to crush recycled coarse aggregate into recycled manufactured sand, which has high quality properties similar to the manufactured sand crushed from natural stone, for preparing high-quality recycled mortar with high strength and good durability.
Journal ArticleDOI
Mechanical properties and uniaxial compressive stress-strain behavior of fully recycled aggregate concrete
TL;DR: In this article , the authors proposed a fully recycled aggregate concrete (FRAC), which was prepared by completely replacing natural aggregates (NA) with recycled coarse and fine aggregates and partially replacing cement with recycled powder (RP).
Journal ArticleDOI
Eco-friendly design of Warm mix asphalt (WMA) with recycled concrete aggregate (RCA): A case study from a developing country
TL;DR: In this paper , the authors developed a trade-off methodology based on the Life Cycle Assessment (LCA) technique and statistical analysis to determine the maximum RCA content to be incorporated into WMA without generating greater environmental impacts.
Journal ArticleDOI
Geopolymers made of recycled brick and concrete powder – A critical review
TL;DR: An overview of published articles about geopolymers containing recycled brick powder (RBP) and recycled concrete powder (RCP) during the last decade (2012 to 2021) is presented in this paper .
Journal ArticleDOI
Potential use of recycled concrete aggregate (RCA) for sustainable asphalt pavements of the future: A state-of-the-art review
Xiong Xu,Yinzhe Luo,Anand Sreeram,Qiaoyun Wu,Guo Jin Chen,Shukai Cheng,Zong Wu Chen,Xuyong Chen +7 more
TL;DR: In this paper , the authors reviewed the previous relevant literature on this topic and summarized the potential use of recycled concrete aggregates (RCA) for asphalt pavement related applications and concluded that the potential application of RCA is a promising candidate to replace the excessive use of natural aggregate for the construction of high quality and sustainable asphalt pavements of the future.
References
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Book
Concrete: Microstructure, Properties, and Materials
P.K. Mehta,Paulo J.M. Monteiro +1 more
TL;DR: Concrete: Microstructure, Properties, and Materials as mentioned in this paper provides complete details on the microstructure-property relationship approach to provide scientific explanation for the strength and durability of concrete.
Journal ArticleDOI
Nanotechnology in concrete – A review
TL;DR: In this paper, the state of the field of nanotechnology in concrete is reviewed and the impact of recent advances in instrumentation and computational materials science and their use in concrete research is discussed.
Journal ArticleDOI
The Interfacial Transition Zone (ITZ) Between Cement Paste and Aggregate in Concrete
TL;DR: In this article, the authors describe the so called interfacial transition zone (ITZ) in concrete as the region of the cement paste around the aggregate particles, which is perturbed by the presence of the aggregate, and show that the higher porosity present initially is significantly diminished by the migration of ions during hydration.
Journal ArticleDOI
Mechanical Properties of Recycled Aggregate Concrete Under Uniaxial Loading
TL;DR: In this article, the compressive strength and the stress-strain curve (SSC) of recycled aggregate concrete (RAC) with different replacement percentages of recycled coarse aggregate (RCA) are investigated experimentally.
Journal ArticleDOI
Fibre reinforced cement-based (FRC) composites after over 40 years of development in building and civil engineering
TL;DR: In this paper, the main fields of application of FRC composites are examined and future perspectives discussed, and some attention is paid to computation methods and composite materials' design approaches.