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Advances in Hydration, Microstructure, and Properties of Modern Cement and Concrete Composites

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

Deadline for manuscript submissions: 20 November 2025 | Viewed by 614

Special Issue Editors

State Key Laboratory of Engineering Materials for Major Infrastructure, Jiangsu Key Laboratory of Construction Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
Interests: cement chemistry; microstructure; calcium silicate hydrate; shotcrete; cement-based functional materials
School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China
Interests: cement hydration; particle-packing model; defect percolation and tortuosity; fiber-reinforced concrete

Special Issue Information

Dear Colleagues,

Modern cement and concrete composites have evolved significantly in recent decades, driven by the urgent need for sustainable, durable, and high-performance construction materials. The complexity of these materials has increased dramatically due to the incorporation of diverse components such as chemical admixtures, mineral additives, and novel supplementary cementitious materials. These advancements have not only enhanced material performance but also introduced new challenges in understanding their hydration kinetics, microstructural evolution, and multi-scale structure–property relationships.

This Special Issue aims to highlight cutting-edge research focused on the fundamental mechanisms governing the hydration processes, microstructural development, and engineering properties of modern cementitious systems. Topics of interest include, but are not limited to, the following:

  • Multi-component interactions: Effects of chemical admixtures, nanomaterials, and mineral additives on hydration kinetics and phase assemblages.
  • Microstructural characterization: Advanced experimental techniques for probing multi-scale microstructural features.
  • Property enhancement: Solutions and mechanisms for property enhancement of cementitious materials (mechanical strength, durability, shrinkage, rheology, etc.).
  • Modern design and simulation approaches: Designing of novel cement and concrete composites and computational modeling (e.g., phase-field, molecular dynamics, and machine learning) for predicting hydration behavior, microstructure formation, and performance optimization.
  • Sustainability-driven innovations: Strategies for reducing carbon footprint, including low-clinker cements, alkali-activated systems, and carbon-capture technologies.

This Special Issue will provide a platform to disseminate foundational research that informs professionals on the topics of rational design, processing, and application of next-generation cement and concrete composites. We warmly welcome your contributions to advance the scientific understanding of modern cement-based materials.

Dr. Xin Liu
Dr. Mingqi Li
Guest Editors

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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

  • hydration
  • microstructure
  • properties
  • modellings
  • material design
  • low carbon
  • modern cement and concrete

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Published Papers (1 paper)

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Research

26 pages, 30904 KiB  
Article
Study on the Alkali-Activated Mechanism of Yellow River Sediment-Based Ecological Cementitious Materials
by Ge Zhang, Enhui Jiang, Kunpeng Li, Huawei Shi, Chen Chen and Chengfang Yuan
Materials 2025, 18(7), 1559; https://doi.org/10.3390/ma18071559 - 29 Mar 2025
Viewed by 252
Abstract
As one of the key components in geopolymer systems, the activator significantly influences the properties of cementitious materials. This study investigates the effects of key activator parameters, specifically alkali equivalent and activator modulus, on the setting time, workability, hydration characteristics, compressive strength, and [...] Read more.
As one of the key components in geopolymer systems, the activator significantly influences the properties of cementitious materials. This study investigates the effects of key activator parameters, specifically alkali equivalent and activator modulus, on the setting time, workability, hydration characteristics, compressive strength, and splitting tensile strength of Yellow River sediment-based slag eco-friendly cementitious materials. Tests such as setting time, slump, flowability, hydration heat, and strength were conducted to evaluate these effects. Additionally, X-ray diffraction (XRD), differential thermal analysis (DTA), mercury intrusion porosimetry (MIP), and scanning electron microscopy with energy dispersive spectroscopy (SEM-EDS) tests were conducted to investigate the mechanisms and variations in microstructural properties. The results indicate that the alkali equivalent and activator modulus significantly affect the setting time, workability, reaction process, and strength of Yellow River sediment-based eco-friendly cementitious materials. An excessively high or low alkali equivalent and activator modulus result in either insufficient or excessive activation, adversely affecting the densification process of the hardened matrix. When the alkali equivalent is 5% and the activator modulus is 1.2, the matrix demonstrates superior flowability, well-regulated and sustained heat evolution during hydration, and achieves compressive and splitting tensile strengths of 61.68 MPa and 4.37 MPa, respectively. Under optimal alkaline conditions, slag dissolution, hydrolysis of silicon–oxygen and aluminum–oxygen tetrahedra, and the formation of low-calcium calcium silicate hydrate (C-S-H) and calcium aluminum silicate hydrate (C-A-S-H) phases are effectively promoted, leading to the development of a wrinkled three-dimensional polymeric gel structure. This structure fills the matrix pores, optimizes the pore structure, and contributes to strength development. Full article
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