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Article
Construction & Building Technology
Zhiheng Deng et al.
Summary: This article investigated the mechanical properties and constitutive model of fiber-reinforced coral aggregate concrete (FRCAC). The test results demonstrated that basalt fibers (BFs), carbon fibers (CFs), and polypropylene fibers (PFs) can enhance the compressive and splitting tensile strength of coral aggregate concrete (CAC) with optimum contents. The elastic modulus of FRCAC slightly increased due to the addition of fibers. Furthermore, fibers improved the peak stress, peak strain, and ultimate strain of CAC, with CFs showing the highest improvement effect.
STRUCTURAL CONCRETE
(2023)
Review
Construction & Building Technology
Jingli Wei et al.
Summary: Reasonable use of coral as concrete aggregate can solve raw material shortage in island engineering construction and reduce costs and energy consumption caused by marine transportation. However, the low compressive strength and high porosity of coral aggregates limit their application in island engineering construction.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Song-song He et al.
Summary: This study aimed to develop seawater coral aggregate pervious concrete (SCAPC) by utilizing coral waste and seawater and assess its potential application to sea islands. The results showed that SCAPC specimens had good compressive strength and water permeability, satisfying the requirements for pedestrian road areas. The different failure patterns of SCAPC samples compared to traditional aggregate pervious concrete were attributed to the fragility of coral aggregate and enhanced interfacial adhesion.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Lei Wang et al.
Summary: The study investigated the effects of different dosages and lengths of fibers on coral sand mortar and concrete. The addition of fibers significantly enhanced the flexural strength and toughness, but excessive fiber dosage reduced working performance. Among the fibers, sisal fiber showed the best strengthening effect.
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-STRUCTURES AND BUILDINGS
(2022)
Article
Construction & Building Technology
Hua Zhang et al.
Summary: This study investigated the effects of loading rate and fiber content on the mechanical properties and acoustic emission characteristics of basalt fiber reinforced concrete (BFRC) under dynamic splitting tests. The results showed that the tensile strength is enhanced with increasing loading rate, and adding basalt fibers also has a similar effect. Optimal fiber contents were found to be 0.1% and 0.15%. Additionally, it was observed that loading rate and fiber content significantly impact the AE characteristics, and the modified constitutive model successfully described the mechanics behavior of BFRC under dynamic splitting loads.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Chemistry, Physical
Bi Sun et al.
Summary: The Split Hopkinson Pressure Bar (SHPB) test device is an important tool for studying the dynamic characteristics of concrete materials. Inertial effect can lead to inaccurate results in SHPB tests, so large-diameter SHPB tests were conducted and a dynamic increase factor (DIF) model considering strain rate effect and inertia effect was established. The experimental results indicate that the strain rate effect is more sensitive in concrete than in mortar, while the inertia effect is more sensitive in mortar than in concrete.
Article
Chemistry, Physical
Luxin Guo et al.
Summary: This study investigated the dynamic compression mechanical properties of POM-fiber-reinforced concrete (PFRC) and the effect of fiber length on these properties. The results showed that POM fiber effectively improved the deformation ability and impact toughness of concrete. The fiber length had an influence on the dynamic compressive strength and toughness of PFRC, but had a minimal effect on the dynamic increase factor. The established damage dynamic constitutive model accurately described the dynamic characteristics of PFRC. This study provides valuable insights for the application of POM fibers in engineering structures subjected to impact loading.
Article
Chemistry, Physical
Hang Shi et al.
Summary: The study investigated the mechanical properties of polypropylene fiber all-coral seawater concrete under triaxial compression, finding that the best deformation properties were achieved with the addition of 3 kg center dot m(-3) of polypropylene fiber. The correct amount of polypropylene fibers significantly enhanced the strength and ductility of the material, improving its brittle characteristics. Additionally, the confining pressure value and polypropylene fiber coupling effect delayed the appearance of initial damage, slowed damage development, and reduced damage severity during triaxial compression.
Article
Engineering, Civil
Qin Zhang et al.
Summary: In this study, the confinement behavior and stress-strain response of concrete columns strengthened with carbon textile reinforced concrete (CTRC) under a uniaxial load were investigated. The experimental results showed that CTRC-confined columns exhibited improved bearing capacity and displacement ductility compared to un-strengthened columns. The number of textile layers, stirrup reinforcement ratio, concrete strength, and short fibers mixed in the strengthening layers all had an impact on the efficiency of the CTRC confining system. Furthermore, a semi-empirical model was proposed to predict the stress-strain response of CTRC confined columns.
ENGINEERING STRUCTURES
(2022)
Article
Construction & Building Technology
Junzu Sun et al.
Summary: A novel composite column filled with structural polypropylene fiber reinforced seawater coral aggregates concrete (SPFSCAC) inside a GFRP tube has been proposed to address the challenge of concrete raw material shortage in reef and island construction. Experimental results showed that adding SPF can increase the compressive bearing capacity and strain of the GFRP tube filled with SPFSCAC, eliminating the negative effects of coral aggregates. The load-strain relationship model for the SPFSCAC filled GFRP tube was proposed based on experimentally obtained curves, providing a reference for design and application of this new material.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Physical
Kai Zhang et al.
Summary: This study investigates the degradation law of mechanical properties and damage characteristic of micro-structure of concrete under freezing-thawing cycles. The research results provide reference and experimental support for the anti-frost design theory and durability life prediction of hydraulic concrete structures in cold regions. Experimental results show that the relative dynamic modulus of elasticity, dynamic compressive strength, flexural strength, and splitting tensile strength of concrete decrease with the increase of freeze-thaw cycles.
Article
Chemistry, Physical
Jinming Liu et al.
Summary: This paper develops an ultrahigh-strength marine concrete containing coral aggregates, optimizing its mechanical properties through optimal mixture design and measurements of various performance parameters to fully utilize the advantages of coral aggregates.
Article
Construction & Building Technology
Qinglong Qin et al.
Summary: This study investigated the anti-abrasion performance and micro-hardness of coral reef sand concrete, and found a linear relationship between the anti-abrasion strength and compressive strength of concrete mixed with fly ash and silica fume. The characteristics of the coral aggregate, including roughness, porosity, shape irregularity, and mineral composition, were found to affect the anti-abrasion performance of the concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Materials Science, Textiles
Jawad Ahmad et al.
Summary: This study aimed to examine the performance of polypropylene fiber reinforced concrete through various tests, concluding that adding PPF can improve the concrete's ductility, first crack load, and maximum crack width. Results showed that fresh properties and mechanical strength of the concrete were optimal with a 2.0% addition of PPF.
JOURNAL OF ENGINEERED FIBERS AND FABRICS
(2021)
Article
Construction & Building Technology
Ditao Niu et al.
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Engineering, Mechanical
Haiyan Ma et al.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2020)
Article
Construction & Building Technology
Bing Liu et al.
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Construction & Building Technology
Liang Ren et al.
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Construction & Building Technology
Lianjun Chen et al.
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Chemistry, Physical
Yan Li et al.
Article
Construction & Building Technology
Bangcheng Lyu et al.
CEMENT & CONCRETE COMPOSITES
(2019)
Article
Construction & Building Technology
Xudong Chen et al.
CONSTRUCTION AND BUILDING MATERIALS
(2013)
Article
Engineering, Civil
Hua Zhang et al.
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
(2013)
Proceedings Paper
Construction & Building Technology
Yi Li et al.
TRENDS IN CIVIL ENGINEERING, PTS 1-4
(2012)
Article
Nanoscience & Nanotechnology
Weimin Li et al.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2009)