Advances in Bio-Sourced Molecules and Materials in Civil Engineering

Topic Information

Dear Colleagues,

Bio-sourced molecules and materials represent the area of highest growth in civil engineering. They include adjuvants, plastics, rubbers, thermoplastic elastomers, adhesives, foams, paints, sealants and admixtures. Bio-products have always been used in civil engineering, including in building and construction, but currently, they are increasingly used to obtain new additives or more efficient composite formulations. The objective of this Topic is to restart the work in this field, and thus better assess the development prospects.

The field of civil engineering faces challenges, and bio-sourced molecules and materials can provide cost-effective solutions, including the following:

• Resolve construction defects such as infiltration, chemical and environmental erosion, corrosion, and deformation;
• The production of energy-efficient materials;
• Minimize construction costs;
• Improve the thermal and acoustic insulation of buildings;
• Use ecofriendly building materials.

Thus, there is a need to replace conventional products with bio-based analogs.

The purpose of this Topic is to present the main types of bio-products used in civil engineering, to highlight the properties that make bio-products an appropriate choice of molecule/material and to list examples of their applications. The following main key properties will be taken into account for construction applications: mechanical properties, thermal and insulating properties, weathering, permeability, flammability, and environmental impact. The different fields of use for numerous bio-molecules or polymeric materials will be examined, including pipes and fittings, foundations, foams, roofing, flooring, paneling, roads, insulation, cable sheaths and sheaths, etc. Fiber-reinforced polymers that consist of several physical phases, including fibrous polymers dispersed in a continuous matrix phase, will also be considered. Polymer concretes will also be discussed due to the global demand for housing, transportation, and concrete products.

Prof. Dr. Patrick M. Martin
Dr. Vincent Dubois
Topic Editors

Keywords

Participating Journals

Journal Name	Impact Factor	CiteScore	Launched Year	First Decision (median)	APC
Materials materials	3.4	5.2	2008	13.9 Days	CHF 2600	Submit
Polymers polymers	5.0	6.6	2009	13.7 Days	CHF 2700	Submit
Sustainable Chemistry suschem	-	-	2020	29.1 Days	CHF 1000	Submit
Molecules molecules	4.6	6.7	1996	14.6 Days	CHF 2700	Submit

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16 pages, 4877 KiB  

Open AccessArticle

Enhancing Fatigue Performance of Coal Gangue Concrete (CGC) through Polypropylene Fiber Modification: Experimental Evaluation

by Di Wu, Laiwang Jing, Yan Li, Tao Ran, Shaochi Peng and Wei Jing

Polymers 2024, 16(8), 1096; https://doi.org/10.3390/polym16081096 - 15 Apr 2024

Viewed by 324

Abstract

Coal gangue is a byproduct of coal mining and processing, and according to incomplete statistics, China has amassed a substantial coal gangue stockpile exceeding 2600 large mountains, which poses a serious threat to the ecological environment. Utilizing gangue as a coarse aggregate to [...] Read more.

Coal gangue is a byproduct of coal mining and processing, and according to incomplete statistics, China has amassed a substantial coal gangue stockpile exceeding 2600 large mountains, which poses a serious threat to the ecological environment. Utilizing gangue as a coarse aggregate to produce gangue concrete (GC) presents a promising avenue for addressing the disposal of coal gangue; however, gangue concrete presents several challenges that need to be tackled, such as low strength and poor resistance to repeated loads. In this study, polypropylene fibers (PPFs) were incorporated into gangue concrete to enhance its utilization rate. Uniaxial compressive and repeated loading experiments were then conducted to investigate the uniaxial strength and fatigue properties of polypropylene fiber-reinforced gangue concrete (PGC) with varying gangue substitution rates (20%, 40%, and 60%) and different polypropylene fiber admixtures (0, 0.1%, 0.2%, and 0.3%). The findings indicate that incorporating gangue at a substitution rate of 40% could notably enhance the uniaxial compressive strength of PGC, resulting in a maximum increase of 19.4%. In the repeated loading experiments, the ductility of PGC was enhanced with the incorporation of PPFs, resulting in a reduction of 33.76% in the damage factor and 19.42% in residual strain for PGC-40-0.2 compared to PGC-40-0. A PPF content of 0.2% was found to be optimal for enhancing the fatigue performance of PGC. Scanning electron microscope (SEM) testing proved the improvement effect of polypropylene fiber on gangue concrete from a microscopic perspective. This study provides crucial experimental data and a theoretical foundation for the utilization of gangue concrete in complex stress environments. Full article

(This article belongs to the Topic Advances in Bio-Sourced Molecules and Materials in Civil Engineering)

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