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Multi-Scale Structural Characterization of Cement-Based Composites (2nd Edition)

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

Deadline for manuscript submissions: closed (20 April 2024) | Viewed by 902

Special Issue Editors

College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
Interests: microstructures; cement-based materials; characterization methods; durability
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School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China
Interests: mass transport; durability; microstructures; NMR
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Guest Editor
China Building Materials Academy, Beijing 100024, China
Interests: non-destructive material characterization; frost damage; electrical resistivity; durability, 3D-printed cement composites
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College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
Interests: textile-reinforced concrete composites; UHPC; FRC; dynamic behaviour
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Guest Editor
College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, China
Interests: concrete; construction materials; corrosion resistant technology; structure dynamics; geopolymer
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Guest Editor
College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
Interests: life-cycle assessmemt; low-carbon cement; strain-hardening composites
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Special Issue Information

Dear Colleagues,

Cement-based composites, which play important roles in civil structures and infrastructure, have recently attracted increasing attention from both scientific and engineer communities. Due to the complexities of the raw materials, design codes, casting methods, curing conditions, and serving environments, the structural characterization of cement-based composites involves significant challenges. The multi-scale nature of cement-based composites causes near-insuperable obstacles for their microstructure characterization, as the commonly used techniques (such as SEM and XCT) have limited scopes in terms of structural characterization. Furthermore, the sustainability requirements for cement-based materials in terms of reducing CO2 emmissions and other environmental impacts make the large-scale uses of solid wastes and the development of highly durable concrete necessary. Additionally, 3D-printed concrete requires viscous fresh materials, involving a layer–layer structure that is different from that of ordinary in-situ-cast concrete. The transport of water and ions in porous cement-based composites relies on the pore structure and the interactions between the species and the cement skeleton. The multi-scale structural characterization of cement-based compsites would help in developing smarter, more sustainble, and more durable materials for civil structures and infrastructure. Therefore, we propose a Special Issue of Materials, including—but not limited to—the topics shown below:

(1) Advanced techniques for multi-scale structural characterization of cement-based composites;

(2) Advanced knowledge of multi-scale structures of cement-based composites;

(3) Multi-scale structural design, fabrication, and synthesis for cement-based composites;

(4) Multi-scale structural characterization of smart, 3D-printed, and sustainable cement-based composites;

(5) Multi-scale, structure-associated mechanical and durability performance assessment for cement-based composites;

(6) Structure changes of cement-based composites in harsh environments.

We warmly welcome researchers and engineers to submit contributions to this Special Issue.

Dr. Qiang Zeng
Dr. Chunsheng Zhou
Dr. Zhendi Wang
Dr. Jiyang Wang
Prof. Dr. Dongming Yan
Dr. Shaoqin Ruan
Guest Editors

Manuscript Submission Information

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Keywords

  • cement-based composites
  • structural characterization
  • multi-scale
  • advanced techniques
  • performances
  • environments

Published Papers (1 paper)

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Research

21 pages, 20982 KiB  
Article
Study on Frost Resistance and Interface Bonding Performance through the Integration of Recycled Brick Powder in Ultra-High-Performance Concrete for Structural Reinforcement
by Yike Zhang, Ali Raza, Muhammad Umar, Yang Chen and Chengfang Yuan
Materials 2023, 16(21), 6999; https://doi.org/10.3390/ma16216999 - 01 Nov 2023
Viewed by 740
Abstract
This study aims to address the issues posed by frost damage to concrete structures in cold regions, focusing on reinforcement and repair methods to increase the service life of existing structures instead of costly reconstruction solutions. Due to the limitations of conventional concrete [...] Read more.
This study aims to address the issues posed by frost damage to concrete structures in cold regions, focusing on reinforcement and repair methods to increase the service life of existing structures instead of costly reconstruction solutions. Due to the limitations of conventional concrete in terms of durability and strength, this research focused on ultra-high-performance concrete (UHPC) by replacing part of the cement with recycled brick powder (RBP) to strengthen ordinary C50 concrete, obtaining UHPC-NC specimens. Mechanical tests investigated the bonding performance of UHPC-NC specimens under various conditions, including interface agents, surface roughness treatments, and freeze–thaw after 0, 50, 100, and 150 cycles with a 30% replacement rate of RBP. Additionally, a multi-factor calculation formula for interface bonding strength was established according to the test data, and the bonding mechanism and model were analyzed through an SEM test. The results indicate that the interface bonding of UHPC-NC specimens decreased during salt freezing compared to hydro-freezing, causing more severe damage. However, the relative index of splitting tensile strength for cement paste specimens showed increases of 14.01% and 14.97%, respectively, compared to specimens without an interface agent. Using an interface agent improved bonding strength and cohesiveness. The UHPC-NC bonding model without an interfacial agent can be characterized using a three-zone model. After applying an interfacial agent, the model can be characterized by a three-zone, three-layer bonding model. Overall, the RBP-UHPC-reinforced C50 for damaged concrete showed excellent interfacial bonding and frost resistance performance. Full article
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