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Advances in Alkali-Activated Materials (AAMs) and Their Applications

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

Deadline for manuscript submissions: 20 July 2026 | Viewed by 502

Special Issue Editor


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Guest Editor
Composites Materials Group (CENM), School of Materials Engineering, Universidad del Valle, Calle 13 #100-00, E44, Cali 760032, Colombia
Interests: alkali-activated materials; geopolymers; building materials; valorization of industrial wastes and construction and demolition wastes; corrosion, durability and sustainability of cementitious materials; eco-friendly construction materials; 3D printing
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Special Issue Information

Dear Colleagues,

Alkali-activated materials (AAMs) represent a line of research that has attracted global interest in terms of providing a real alternative to replace Portland cement (OPC). However, despite this, it is believed that current and future research should focus on overcoming the challenges technology faces regarding its application at an industrial level. One of the main barriers to scaling at an industrial level is the scarcity of studies on truly available and sustainable raw materials (precursors and activators). In general, AAMs have a global warming potential (GWP) lower than that of ordinary Portland cement (OPC)—that is to say, the manufacturing processes can be less energy intensive according to the precursor and activator used. It is noted that “alkali-activated cements and concretes” (AACs), including so-called "geopolymers" (GPs), allow for the use of supplementary cementitious materials (wastes and industrial by-products) (SCMs) (100%) as the base material, giving rise to OPC-free cements, and other groups known as “hybrid cements” (HYCs) or “alkali-activated Portland blended cement”, which combine two technologies, i.e., the positive effects of OPC with AACs. AAMs can be utilized in many high-added-value applications such as soil stabilization, ceramics, and composite production, structural elements, repair and protective coatings, immobilization of toxic metals and nuclear wastes, thermal insulation, biomedical materials, and others.

The scope of this Special Issue “Advances in Alkali-Activated Materials (AAMs) and Their Applications” is to promote the broad potential of raw materials (precursors and activators), and a better understanding of the chemical, mechanical, and durability behaviors of AAMs in different applications. Potential topics for submissions include (but are not limited to) the following:

  • Precursors of alkali-activated materials (natural pozzolan, construction and demolition wastes, fly ashes, slags, and others);
  • Conventional and alternative activators;
  • Alkali-activated concretes (design methodology, properties, and durability);
  • One-part mix designs (“just add water” dry mixtures);
  • Hybrid cements;
  • Life cycle assessment (LCA);
  • 3D printing;
  • New Applications.

Prof. Dr. Ruby Mejía de Gutiérrez
Guest Editor

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 250 words) can be sent to the Editorial Office for assessment.

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.

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

  • alkali-activated materials
  • geopolymers
  • building materials
  • valorization of industrial wastes and construction and demolition wastes
  • corrosion, durability and sustainability of cementitious materials
  • eco-friendly construction materials
  • 3D printing

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Published Papers (1 paper)

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Research

17 pages, 4186 KB  
Article
Effect of a Composite Activator on Comprehensive Performance of Alkali-Activated Foam Concrete
by Zhongshuai Hu, Yuanliang Xiong, Yuchen Cai, Shaoyuan Zheng, Yuting Lv, Yan Li, Xinrong Zhao, Yongkang Wang and Liguo Ma
Materials 2026, 19(8), 1616; https://doi.org/10.3390/ma19081616 - 17 Apr 2026
Viewed by 277
Abstract
This study investigates the synergistic mechanism between composite activators (NaOH and Na2SiO3 blend) and the microstructure–macroperformance relationship of foam concrete, focusing on the influence of different activator dosages on foam concrete stability, compressive strength, and drying shrinkage behavior. Experimental results [...] Read more.
This study investigates the synergistic mechanism between composite activators (NaOH and Na2SiO3 blend) and the microstructure–macroperformance relationship of foam concrete, focusing on the influence of different activator dosages on foam concrete stability, compressive strength, and drying shrinkage behavior. Experimental results indicate that excessively high activator dosages impair foam concrete stability, reduce compressive strength, and accelerate drying shrinkage. However, an appropriate amount of composite activator effectively improves the stability of freshly mixed foam concrete, significantly reducing settlement rates. During the hardening stage, it optimizes pore size distribution, promotes the formation of denser hydration products, and enhances the mechanical properties of the pore framework, thereby synergistically improving the mechanical performance of foam concrete. Full article
(This article belongs to the Special Issue Advances in Alkali-Activated Materials (AAMs) and Their Applications)
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