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Special Issue "Numerical Modeling and Mechanical Properties of Fiber-Reinforced Cementitious Composites"

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

Deadline for manuscript submissions: closed (30 November 2023) | Viewed by 1826

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Special Issue Editors

Dr. Juntao Zhu

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Guest Editor

School of Hydraulic and Civil Engineering, Zhengzhou University, Zhengzhou 450001, Henan
Interests: fiber-reinforced cementitious composites; multiscale modeling; concrete materials and structures; numerical analysis; composite repairs and structural strengthening

Dr. Ke Li

E-Mail Website
Guest Editor

School of Hydraulic and Civil Engineering, Zhengzhou University, Zhengzhou 450001, Henan
Interests: fiber-reinforced cementitious composites; fiber-reinforced polymer; concrete materials and structures; numerical analysis; structural strengthening; fatigue performance

Special Issue Information

Dear Colleagues,

Numerical modeling and mechanical properties of fiber-reinforced cementitious composites (FRCCs) are always attractive research topics. However, there are persistent challenges in the creative design of materials and structural components when developing high-performance construction materials to be used in durable, sustainable and resilient infrastructures and advanced construction technology. This Special Issue provides an informative and stimulating forum to promote academic communications on this challenging topic, focusing on the development and applications of numerical and experimental methods, and algorithms for simulating and analyzing mechanical properties of FRCCs and structures made of FRCCs.

Original research papers and review articles with a focus on the numerical modeling and mechanical properties of FRCCs tailored for engineering applications are encouraged to be submitted. Topics can include, but are not limited to, the following: experimental and numerical analyses of mechanical properties of FRCCs and structures; durability of FRCCs and structures in harsh environments; the fatigue performance of FRCCs and structures; the 3D printing of FRCCs; the dynamic performance of FRCCs and structures; and multiscale models and methods for the deformation and failure analysis of FRCCs and structures.

Dr. Juntao Zhu
Dr. Ke Li
Guest Editors

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Keywords

fiber-reinforced cementitious composites
numerical methods
mechanical properties
multiscale modeling
experimental analysis
material modification

Published Papers (3 papers)

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Research

24 pages, 7467 KiB

Open AccessArticle

Experimental Study on Mechanical Properties of Coal-Based Solid Waste Nanocomposite Fiber Cementitious Backfill Material

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Materials 2023, 16(15), 5314; https://doi.org/10.3390/ma16155314 - 28 Jul 2023

Viewed by 466

Abstract

Previous studies have shown that coal-based solid waste can be utilized in combination with cement, silica fume, and other modified materials to create a cemented backfill material. However, traditional cemented backfill materials have poor mechanical properties, which may induce the emergence of mining pressure and trigger dynamic disaster under complex mining conditions. In this study, the nanocomposite fiber was used to modify the traditional cemented backfill materials and a new cemented backfill material was developed using coal-based solid waste, nanocomposite fiber and other materials. Specifically, coal gangue, fly ash, cement, and glass fibers were used as the basic materials, different mass fractions of nano-SiO₂ were used to prepare cemented backfill materials, and the mechanical enhancement effect of the compressive strength, tensile strength, and shear strength of the modified materials was analyzed. The results show that when the nano-SiO₂ dosage is 1%, the optimal compressive strength of the specimens at the curing age of 7 d can be obtained compared with cemented materials without nano-SiO₂, and the compressive strength of the modified specimens raises by 84%; when the nano-SiO₂ dosage is 1%, the optimal tensile strength and shear strengths of the modified specimens can be obtained at the curing age of 28 d, increasing by 82% and 142%. The results reveal that nanocomposite fibers can be used as additives to change the mechanical properties of cemented backfill materials made using coal-based solid waste. This study provides a reference for the disposal of coal-based solid waste and the enhancement of the mechanical properties of cemented backfill materials. Full article

(This article belongs to the Special Issue Numerical Modeling and Mechanical Properties of Fiber-Reinforced Cementitious Composites)

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25 pages, 13083 KiB

Open AccessArticle

Bonding Properties between Fly Ash/Slag-Based Engineering Geopolymer Composites and Concrete

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Materials 2023, 16(12), 4232; https://doi.org/10.3390/ma16124232 - 07 Jun 2023

Cited by 3 | Viewed by 725

Abstract

Concrete infrastructure repair remains a formidable challenge. The application of engineering geopolymer composites (EGCs) as a repair material in the field of rapid structural repair can ensure the safety of structural facilities and prolong their service life. However, the interfacial bonding performance of existing concrete with EGCs is still unclear. The purpose of this paper is to explore a kind of EGC with good mechanical properties, and to evaluate the bonding performance of EGCs with existing concrete using a tensile bonding test and single shear bonding test. At the same time, X-ray diffraction (XRD) and Scanning electron microscopy (SEM) were adopted to study the microstructure. The results showed that the bond strength increased with the increase in interface roughness. For polyvinyl alcohol (PVA)-fiber-reinforced EGCs, the bond strength increased with the increase in FA content (0–40%). However, with the change of FA content (20–60%), the bond strength of polyethylene (PE) fiber-reinforced EGCs have little change. The bond strength of PVA-fiber-reinforced EGCs increased with the increase in water–binder ratio (0.30–0.34), while that of PE-fiber-reinforced EGCs decreased. The bond–slip model of EGCs with existing concrete was established based on the test results. XRD studies showed that when the FA content was 20–40%, the content of C-S-H gels was high and the reaction was sufficient. SEM studies showed that when the FA content was 20%, the PE fiber–matrix bonding was weakened to a certain extent, so the ductility of EGC was improved. Besides, with the increase in the water–binder ratio (0.30–0.34), the reaction products of the PE-fiber-reinforced EGC matrix gradually decreased. Full article

(This article belongs to the Special Issue Numerical Modeling and Mechanical Properties of Fiber-Reinforced Cementitious Composites)

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15 pages, 4292 KiB

Open AccessArticle

Experimental Study on Lap-Spliced Performance of High-Strength Stainless Steel Wire Mesh in Engineering Cementitious Composites

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Materials 2023, 16(11), 3959; https://doi.org/10.3390/ma16113959 - 25 May 2023

Viewed by 692

Abstract

To investigate the mechanical properties of high-strength stainless steel wire mesh (HSSSWM) in Engineering Cementitious Composites (ECCs) and determine a reasonable lap length, a total of 39 specimens in 13 sets were designed and fabricated by considering the diameter of the steel strand, spacing of the transverse steel strand, and lap length. The lap-spliced performance of the specimens was tested through a pull-out test. The results revealed two failure modes in the lap connection of steel wire mesh in ECCs: pull-out failure and rupture failure. The spacing of the transverse steel strand had little effect on the ultimate pull-out force, but it restricted the slip of the longitudinal steel strand. A positive correlation was found between the spacing of the transverse steel strand and the slip amount of the longitudinal steel strand. With an increase in lap length, the slip amount and ‘lap stiffness’ to peak load increased, while the ultimate bond strength decreased. Based on the experimental analysis, a calculation formula for lap strength considering the correction coefficient β was established. Full article

(This article belongs to the Special Issue Numerical Modeling and Mechanical Properties of Fiber-Reinforced Cementitious Composites)

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