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Thermal, Hygrothermal, Structural and Fire Resistance Analyses of Structural Lightweight Concrete

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Energy Science and Technology".

Deadline for manuscript submissions: closed (30 November 2022) | Viewed by 2466

Special Issue Editors


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Guest Editor
GICONSIME Research Group, University of Oviedo, 33204 Gijón, Spain
Interests: numerical simulation; coupled problems

E-Mail Website
Guest Editor
GICONSIME Research Group, University of Oviedo, 33204 Gijón, Spain
Interests: building materials; thermal analysis; fire resistance analysis; numerical simulation

E-Mail Website
Guest Editor
GICONSIME Research Group, University of Oviedo, 33204 Gijón, Spain
Interests: numerical simulation; advanced materials; energy efficiency
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
GICONSIME Research Group, University of Oviedo, 33204 Gijón, Spain
Interests: sustainable construction; energy saving; thermal analysis; heat transfer; civil engineering materials; building materials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue is devoted to the study and analysis of Lightweight Concretes (LWCs) in different research fields. LWCs have been proven to be more efficient and ecological than traditional concretes. LWCs are widely used in the construction field and have achieved good mechanical performance and thermal efficiency, reducing environmental impacts in construction.

However, there is a lack of knowledge about their structural, hygrothermal and fire resistance performances when they are combined with other materials such as steel or wood-based products. Furthermore, the use of phase-change materials, nanoparticles or other additions in combination with LWCs is a current challenge to climate change.

Authors should show original contributions with the use of LWC or mortar products with LWCs as the base material, and its relation with new applications and composite elements. Scientific and construction industries should aim to research efficient and sustainable buildings. A significant amount of pollutant gasses worldwide and one-third of energy demands are associated with the construction industry. In order to extend the use of LWC and its applications such as 3D printing lightweight mortars or lightweight concrete with fibers, papers related to these contributions in these fields are welcome.

This Special Issue aims to gather research and review papers related to mechanical, fire and postfire performances; energy efficiency; and life cycle assessments in civil, mechanical, biomedical, aeronautical, aerospace engineering or architectural heritage.

In particular, possible topics for submissions include but are not limited to validating, at hybrid, experimental or numerical levels, practical applications of real cases. The message of the submissions, with respect to the future generations of engineers and architects, should explore LWCs as secure, sustainable, thermal and structurally efficient materials as substitutes of traditional concrete in the new world.

Prof. Dr. Juan José del Coz Díaz
Dr. Juan Enrique Martínez-Martínez
Dr. Mar Alonso-Martinez
Dr. Felipe Pedro Álvarez-Rabanal
Guest Editors

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 2400 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

  • energy efficiency
  • lightweight concrete
  • numerical simulation
  • thermal analysis, hygrothermal studies, fire resistance analysis

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Published Papers (1 paper)

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Research

22 pages, 37670 KiB  
Article
Nonlinear Thermo-Structural Analysis of Lightweight Concrete and Steel Decking Composite Slabs under Fire Conditions: Numerical and Experimental Comparison
by Juan Enrique Martínez-Martínez, Felipe Pedro Álvarez-Rabanal, Mar Alonso-Martínez and Juan José del Coz-Díaz
Appl. Sci. 2022, 12(18), 9306; https://doi.org/10.3390/app12189306 - 16 Sep 2022
Cited by 4 | Viewed by 2028
Abstract
Composite slabs with steel decking profiles are widely used in building construction. However, the literature on the fire resistance of lightweight concrete (LWC) composite slabs with steel decking is limited. In this work, the thermo-structural performance of LWC composite slabs with trapezoidal steel [...] Read more.
Composite slabs with steel decking profiles are widely used in building construction. However, the literature on the fire resistance of lightweight concrete (LWC) composite slabs with steel decking is limited. In this work, the thermo-structural performance of LWC composite slabs with trapezoidal steel decking was studied under fire conditions. A total of 12 experimental fire tests were carried out using specimens of 160 mm thickness, 1120 mm width and 2030 mm length, in which nine composite slabs were made of LWC and the remaining three slabs were made of normal concrete (NC) to serve as a benchmark for comparison. All the samples were tested in a furnace following EN 13381-5, applying the standardized time–temperature curve and constant load. During the experimental tests, phenomena such as the vaporization of the free water inside LWC, debonding between steel decking and concrete and changes in material properties affected the thermo-structural performance of composite slabs. The test results show that the load-bearing capacity of lighter slabs does not assure the minimum structural behavior of R30. However, the lighter the concrete is, the lower the thermal transmittance, improving the slabs’ thermal performance under fire conditions. Advanced nonlinear numerical models were developed to predict the thermal and structural performance of the studied LWC composite slabs in terms of temperature and time-displacement. The influences of key factors such as vaporization, thermal strains and debonding were included using material properties and a thermal contact conductance interlayer. Finally, the nonlinear models and the experimental results were compared. The difference between the experimental and numerical values was less than 15%, showing that the numerical results were in good agreement with the experimental results. The results of this study also compared the performance of LWC composite slabs with the NC composite slabs, giving rise to interesting conclusions from a practical point of view. Full article
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