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Effects of Adding Cement Admixtures on the Microstructure and Properties...
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Effects of Adding Cement Admixtures on the Microstructure and Properties of Cement Materials (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: 20 October 2025 | Viewed by 291

Special Issue Editors

Dr. Hongwei Wang

E-Mail Website
Guest Editor
School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Interests: underground sustainable backfill; solid waste resource utilization; new low-carbon cementitious materials; sustainable geotechnical engineering; mining safety
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Ying Shi

E-Mail Website
Guest Editor
School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Interests: recycle of industrial solid waste; cemented waste backfill; biological treatment of waste; MICP; detoxication of tailings
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Cement, as the most widely used construction material, is often influenced by the addition of various additives, which can greatly improve its performance. With the increasing interest in additives, there have been significant advancements in the hydration process and microstructure of cement.

Additives play a crucial role in the production and utilization of modern cement. They can be utilized to meet diverse requirements, such as enhancing the strength of cement and concrete, adjusting the setting time of cement, and controlling the water requirements of concrete. In addition to these performance benefits, additives also contribute to reducing production costs and minimizing adverse environmental impacts.

This Special Issue aims to gather research papers and review articles that address the challenges associated with the application of additives in cement and concrete materials. We welcome research papers focusing on numerical simulations of additives, as well as manuscripts presenting experimental verification.

Dr. Hongwei Wang
Prof. Dr. Ying Shi
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

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Keywords

  • cement admixtures
  • microstructure
  • hydration process
  • mechanical properties
  • durability
  • compressive strength
  • tensile strength
  • chemical admixtures
  • supplementary cementitious materials (SCMS)
  • cement paste
  • concrete performance
  • permeability
  • shrinkage
  • cracking resistance
  • sustainable construction materials
  • high-performance concrete
  • carbon emissions reduction
  • durability enhancement

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Published Papers (1 paper)

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15 pages, 4450 KiB  
Article
Effect of Nano-SiO2 on the Hydration, Microstructure, and Mechanical Performances of Solid Waste-Based Cementitious Materials
by Zian Geng, Yu Zhang, Yiwen Zhou, Jiapeng Duan and Zhuqing Yu
Materials 2025, 18(11), 2636; https://doi.org/10.3390/ma18112636 - 4 Jun 2025
Viewed by 73
Abstract
Solid waste-based cementitious materials (SWBC) are composed of steel slag (SS), granulated blast furnace slag (GBFS), fly ash (FA), desulfurization gypsum (DG), and Portland cement (PC). Currently, SWBC holds great potential as a sustainable building material; however, its low early compressive strength and [...] Read more.
Solid waste-based cementitious materials (SWBC) are composed of steel slag (SS), granulated blast furnace slag (GBFS), fly ash (FA), desulfurization gypsum (DG), and Portland cement (PC). Currently, SWBC holds great potential as a sustainable building material; however, its low early compressive strength and volume expansion limit its range of application. Therefore, the main objective of this study is to enhance the mechanical properties and dimensional stability of SWBC by adding nano-SiO2, while also improving its resistance to chloride ions, thereby promoting its use in the field of sustainable building materials. A comprehensive experimental approach integrating mechanical performance testing, shrinkage analysis, and chloride diffusion coefficient evaluation was established, with the testing methods of thermogravimetric analysis-differential scanning calorimetry (TG-DSC), X-ray diffraction (XRD), and scanning electron microscopy (SEM). The study found that adding nano-SiO2 enhanced the nucleation of calcium silicate hydrates (C-S-H) gel in hydrated SWBC, leading to improved compressive strength and reduced chloride permeability when SiO2 addition was 0.5%. When the hydration period extends to 28 days, the modified SWBC achieves a compressive strength of 56 MPa. However, excessive nano-SiO2 (≥1%) inhibited the long-term hydration of SWBC but had no significant effect on the final compressive strength. Full article
(This article belongs to the Special Issue Effects of Adding Cement Admixtures on the Microstructure and Properties of Cement Materials (2nd Edition))
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