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Durability Studies on the Concrete and Related Composites (Second Edition)

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

Deadline for manuscript submissions: 10 August 2024 | Viewed by 534

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Guest Editor
Poznan University of Technology, Faculty of Civil and Transport Engineering, Instutute of Building Engineering, 60-965 Poznań, Poland
Interests: Building materials, concrete technology, nanotechnology, nanomaterials, chemical technology, fibre-reinforced concrete, durability, sustainable construction
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Special Issue Information

Dear Colleagues,

It is well known that the production of materials based on cement, especially concrete, is associated with high greenhouse gas emissions, mainly CO2, and a large carbon footprint. Therefore, in recent years, the cement and concrete industry has increasingly paid attention to the search for new material solutions that will contribute to the greater durability of this material. Durability is a very broad term, usually equated with a high strength material that will guarantee the long service life of cement-based materials. However, it is important to note that durability in this sense will also be affected by external factors acting on the material and determining its performance. These factors may be chemical in nature, such as carbonation, chloride or acid attack, or physical in nature, such as cyclic frost or abrasion, etc. This makes it important to take a complete look at the production of cement-based materials, taking into account the correlation between chemical composition, microstructure and external environmental factors, which will ensure high material durability and performance and will result in a lower environmental impact, thus contributing to more sustainable construction.

Therefore, topics of interest include, but are not limited to, the following:

  • Materials design and characterization for enhanced durability;
  • Concrete and cementitious composites including advanced nanomaterials;
  • Durability of concrete and cement-based materials (e.g., chloride attack, carbonation, sulfate attack, acid attack, alkali-silica reaction, freeze/thaw, abrasion, etc.);
  • Possibility of reusing old and recovery building materials or by-products in concrete in the aspect of durability and sustainable development;
  • Durability and sustainability assessment.

The aim of this Special Issue is to present the latest research and advances in this area, particularly on the microstructures and durability of concrete and cementitious materials in the aspect of sustainable development. Original research papers, state-of-the-art reviews, communications, and discussions are welcomed.

Prof. Dr. Agnieszka Ślosarczyk
Guest Editor

Manuscript Submission Information

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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

  • concrete
  • supplementary materials
  • cementitious-like composites
  • durability
  • environmental factors
  • nanotechnology in concrete
  • sustainable development
  • by-products
  • recycling concrete

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Published Papers (1 paper)

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Research

19 pages, 6005 KiB  
Article
Chloride Corrosion Process of Concrete with Different Water–Binder Ratios under Variable Temperature Drying–Wetting Cycles
by Lei Wang, Chunhong Chen, Ronggui Liu, Pinghua Zhu, Hui Liu, Hongwei Jiang and Jiang Yu
Materials 2024, 17(10), 2263; https://doi.org/10.3390/ma17102263 - 11 May 2024
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Abstract
In this paper, four water–binder ratios (w/b) of 0.29, 0.33, 0.39, and 0.46 were designed. A variable test temperature was implemented in the drying–wetting cycle test according to the temperature fluctuations in the actual service environment, and the constant temperature test was established [...] Read more.
In this paper, four water–binder ratios (w/b) of 0.29, 0.33, 0.39, and 0.46 were designed. A variable test temperature was implemented in the drying–wetting cycle test according to the temperature fluctuations in the actual service environment, and the constant temperature test was established as the control group. The mechanical properties and chloride corrosion resistance of concrete with different w/b ratios under variable temperature drying–wetting cycles, as well as the microstructure changes, phase composition, and damage mechanism inside the concrete, were investigated. The results showed that the mechanical properties of concrete increased first and then decreased with drying–wetting cycles increasing, whereas the chloride corrosion resistance continued to decline. A higher w/b exacerbated the deterioration of the concrete performance. A higher w/b increased the porosity, chloride diffusion depth, and chloride content, thus reducing the resistance of chloride corrosion. Compared with w/b = 0.29, the compressive strength, splitting tensile strength, mass, and relative dynamic elasticity modulus of w/b = 0.46 exposed to 60 drying–wetting cycles decreased by 54.50%, 52.44%, 0.96%, and 6.50%, respectively, while the porosity, peak chloride content, and erosion depth increased by 45.12%, 70.45%, and 45.00%. Compared with the drying–wetting cycle with a constant temperature, the cumulative damage caused by the drying–wetting cycle with a variable temperature was greater, resulting in more severe deterioration of concrete performance. The increase in the test temperature significantly accelerated the diffusion rate, penetration depth, and chemical binding capacity of chloride ions. After 60 drying–wetting cycles, the peak chlorine content and erosion depth of w/b = 0.46 under variable temperature cycles were 15.38% and 10.32% higher than those under a constant temperature, while the compressive strength, splitting tensile strength, mass, and relative dynamic elastic modulus were reduced by 7.76%, 14.81%, 0.33%, and 2.40%, respectively. Microscopic analysis confirmed that higher w/b and variable temperature cycles accelerated the decay of mechanical properties and the decline of chloride corrosion resistance. According to the numerical fitting analysis, the w/b should be 0.29~0.39 under the condition that the mechanical properties and chloride corrosion resistance of concrete are met. Full article
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