Article
Engineering, Mechanical
Runze Cai, Jize Mao, Hui Qi, Jia Qu, Qingyong Guo
Summary: This paper investigates the cracking behavior of repaired concrete structures through notched dynamic semi-circular bend tests. The results show that both the dynamic fracture toughness and crack propagation speed of concrete increase linearly with the loading rate. A threshold value exists beyond which the crack speed stabilizes, and the notch depth has little influence on the fracture toughness. Cracks propagate along the aggregates and remain intact under low loading rates, but penetrate and roughen the fracture surface at higher loading rates. Repaired concrete structures exhibit greater energy dissipation and produce flying fragments with lower kinetic energy, providing protection against secondary damage.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
Article
Mechanics
Arthur Lintner, Reinhard Pippan, Martin Schloffer, Anton Hohenwarter
Summary: Intermetallic titanium aluminides (TiAl) have great potential for high temperature applications due to their high specific strength, creep, and oxidation resistance, but their use for structural components is limited by low ductility and fracture toughness. A study was conducted to determine the fracture toughness of a third generation TiAl-alloy over a wide range of loading rates, and it was found that the dynamic fracture initiation toughness slightly increases up to loading rates of KI = 106 MPa root m/s.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Engineering, Mechanical
Kewei Liu, Tengfei Guo, Jiacai Yang, Sizhou Ma
Summary: The fracture behavior of rock-concrete bi-material structures with interface crack was studied using both static and dynamic testing. It was found that different fracture patterns could occur depending on the interface inclination angle. The increase of strain rate led to more secondary cracks and an increase in dissipated energy. The dimensionless stress intensity factors (SIFs) and the crack length-diameter ratio also affected the fracture behavior. The interface inclination angle had a significant effect on both static and dynamic fracture toughness, with the dependence of dynamic fracture toughness on inclination being higher.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
Article
Chemistry, Physical
Chaohua Zhao, Hualin Li, Yi Peng, Xiaoyao Jia, Ali Rahman
Summary: This research investigated the feasibility of using a combination of SBR and acrylate polymer to improve the toughness of pervious concrete while keeping its permeability. XG-6001 acrylate polymer was found to significantly enhance the toughness of the CMPC, and increasing its mix proportion proved to be challenging. The proposed CMPC holds promising application value in sustainability traffic road construction.
Article
Chemistry, Physical
Xiaoyu Meng, Qinghui Jiang, Ruyan Liu
Summary: This study investigated the influence of different factors such as coarse aggregate size, geogrid position, and geogrid layer number on the permeability, strength, and flexural performance of pervious concrete. The results showed that proper placement of geogrids improved permeability and compressive strength, while also enhancing flexural strength, deformability, and energy absorption capability of pervious concrete beams. The study proposed a new evaluation method to distinguish the contribution of geogrids and concrete mixture to the flexural toughness of pervious concrete beams, with geogrids at one-third and two-thirds of the heights of the beams resulting in optimum flexural performance.
Article
Construction & Building Technology
Mehran Khan, Mingli Cao, Chaopeng Xie, Majid Ali
Summary: The study explored the influence of basalt fiber length and content on compressive and fracture parameters of hybrid fiber reinforced concrete (HyFRC). Results indicated that basalt fibers of different lengths and contents showed a great potential in enhancing the compressive and fracture properties of HyFRC.
STRUCTURAL CONCRETE
(2022)
Article
Mechanics
Liguo Sun, Chengbin Du, Mohsen Ghaemian, Wenhu Zhao
Summary: Considering the quasi-brittle mechanical properties of concrete, this paper uses and improves wedge-splitting tests to study the fracture behavior of concrete. A novel wedge-splitting device is designed, and complete load-strain/CMOD curves of concrete can be generated directly with the proposed test design. The fracture toughness and the fracture energy can be calculated easily without numerical fitting using the double-K fracture model.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Construction & Building Technology
Xiaoyu Zhao, Wei Dong, Binsheng Zhang, Yiming Wang
Summary: To investigate the fracture properties of the rock-concrete interface after fatigue loading, fatigue tests were carried out under three-point bending loading. The results showed that interfacial crack did not initiate if the applied maximum fatigue load was lower than the initial cracking load under quasi-static loading. However, microcracks would occur and accumulate during the fatigue process, generating a larger damage area. A distribution model of the nominal initial fracture toughness along the interfacial ligament was derived for the fatigued specimens, and a crack propagation criterion based on the nominal initial fracture toughness was proposed and validated.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2023)
Article
Construction & Building Technology
Amir Ali Emadi, Amir Modarres
Summary: The study revealed that the cracking behavior of rubberized concrete beams changed with the reduction of water to cement ratio, leading to variations in fracture parameters. Furthermore, the GF/Gf ratio for rubberized concrete containing different WCRs was approximately 2.44.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Wenyan Yuan, Wei Dong, Binsheng Zhang, Juyao Yu
Summary: A new fracture test method called the bottom-notched splitting (BNS) test is proposed to determine the double-K fracture parameters of concrete. The BNS test involves subjecting a concrete cube with a preset crack on the bottom surface to a line compressive load on the top surface. The results show that the BNS tests are effective in determining the double-K fracture parameters and are convenient to operate.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2023)
Review
Construction & Building Technology
Mostafa Adresi, Alireza Yamani, Mojtaba Karimaei Tabarestani, Hamed Rooholamini
Summary: The concept of sustainable urban development and construction based on porous concrete pavement has been proposed to address the issues of heat island effect and uncontrollable floods caused by global warming, climate change, and human activities. The properties and performance of pervious concrete have been studied, along with testing methods and means of maintaining permeability. The correlation between porous pavement and sponge city has been examined. An optimal mix design has been presented for pervious concrete to be used as a pavement material in sponge city, meeting structural requirements and durability needs.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Xing-yan Shang, Zhong-guan Zhou, Kai Yan, Jing-hui Wu, Ling-zhi Li, Jiang-tao Yu
Summary: This study investigated the interfacial fracture properties of engineered cementitious composites (ECC) and fire-damaged concrete using bi-material wedge splitting specimens. The effects of maximum temperature and interfacial roughness on damage mode, fracture toughness, and fracture energy were studied. The results showed that the damage mode changed from adhesive failure to cohesive failure at a maximum temperature of 400 degrees C and with rough interface. The fracture toughness and fracture energy were the highest at 400 degrees C but decreased with increasing temperature. They initially increased and subsequently decreased with increasing roughness, with maximum values obtained at 3 mm interface roughness.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Construction & Building Technology
Benxing Lou, Fuheng Ma
Summary: This paper investigated the fracture properties of concrete after steam curing at a constant temperature of 60 degrees C for various time periods. The results showed that the initial fracture toughness of concrete increased and then decreased with increasing steam curing time, while the unstable fracture toughness and fracture energy increased monotonously and leveled off between 16 h and 48 h. The equivalent maturity approach was proven to be effective in evaluating fracture parameters of steam-cured concrete. Additionally, it was recommended to keep the steam curing time within 16 hours for better development of fracture properties.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Construction & Building Technology
Shangwei Wang, Haitang Zhu, Fan Liu, Shengzhao Cheng, Bo Wang, Lin Yang
Summary: This study investigates the influence of steel fiber content and concrete strength on the flexural toughness of ultra-high performance concrete with coarse aggregate (CA-UHPC). The results show that the highest toughness efficiency is achieved when the fiber content is between 1.5% and 2%. There is a linear increase in fracture energy with increasing steel fiber content. Fracture energy increases and then decreases with increasing flexural strength, with the highest fracture energy obtained at a flexural strength of 24.1 MPa. Furthermore, a modified approach for the CECS13 method is proposed, which demonstrates better predictive validity compared to the original method.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Construction & Building Technology
Yu-Cheng Kan, Ming-Gin Lee, Hung-Wei Lee
Summary: This paper investigates the behavior of fracture mechanics and fracture properties of epoxy-repaired concrete in Mode I fracture. The fracture toughness and fracture energy of the repaired concrete can be improved by epoxy resin and mortar, with both increasing with the amount of fine sand content in epoxy mortar up to the workability limit. The Mode I fracture behavior of the repaired concrete exhibits higher resistance to fracture and greater ductility compared to plain concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Materials Science, Characterization & Testing
Dandan Shi, Xudong Chen, Nan Shen, Saisai Liu, Shengtao Li
JOURNAL OF TESTING AND EVALUATION
(2019)
Article
Engineering, Multidisciplinary
Guo Yang, Xudong Chen, Weihong Xuan, Yuzhi Chen
SADHANA-ACADEMY PROCEEDINGS IN ENGINEERING SCIENCES
(2018)
Article
Materials Science, Characterization & Testing
Xudong Chen, Dandan Shi, Shengtao Li, Xiangqian Fan, Jun Lu
JOURNAL OF TESTING AND EVALUATION
(2019)
Article
Materials Science, Characterization & Testing
Lingyu Xu, Xudong Chen, Yuzhi Chen
JOURNAL OF TESTING AND EVALUATION
(2019)
Article
Construction & Building Technology
Chen Chen, Xudong Chen, Shengshan Guo
STRUCTURAL CONTROL & HEALTH MONITORING
(2019)
Article
Construction & Building Technology
Xudong Chen, Dandan Shi, Nan Shen, Shengtao Li, Saisai Liu
INTERNATIONAL JOURNAL OF CONCRETE STRUCTURES AND MATERIALS
(2019)
Article
Construction & Building Technology
Xudong Chen, Zhiheng Liu, Shengshan Guo, Yebo Huang, Wenlei Xu
CONSTRUCTION AND BUILDING MATERIALS
(2019)
Article
Engineering, Civil
Xudong Chen, Dandan Shi
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
(2019)
Article
Construction & Building Technology
Jiayi Yuan, Xudong Chen, Nan Shen, Xiangqian Fan, Jun Lu
Summary: The correlation analysis in this paper revealed that fatigue load significantly affects the pore structure of self-compacting rubberised concrete, leading to deterioration as damage develops. Parameters of pore structure can serve as indices for predicting fatigue life.
ROAD MATERIALS AND PAVEMENT DESIGN
(2021)
Article
Engineering, Civil
Xudong Chen, Jingwu Bu, Wei Zhou, Qiao Wang
FIRE SAFETY JOURNAL
(2019)
Article
Engineering, Mechanical
Yuzhu Guo, Xudong Chen, Xiaojing Li, Shengtao Li, Shengshan Guo
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2019)
Article
Materials Science, Characterization & Testing
Pan Ming, Jun Lu, Shaowei Hu, Xiangqian Fan, Xudong Chen, Ji Lin
RUSSIAN JOURNAL OF NONDESTRUCTIVE TESTING
(2019)
Article
Computer Science, Interdisciplinary Applications
Xiangyi Zhu, Xudong Chen, Nan Shen, Huaxuan Tian, Xiangqian Fan, Jun Lu
COMPUTERS AND CONCRETE
(2018)
Article
Computer Science, Interdisciplinary Applications
Jingwu Bu, Xudong Chen, Saisai Liu, Shengtao Li, Nan Shen
COMPUTERS AND CONCRETE
(2018)
Article
Engineering, Multidisciplinary
Y. Chen, X. Chen, J. Bu
BULLETIN OF THE POLISH ACADEMY OF SCIENCES-TECHNICAL SCIENCES
(2018)
