Searched for: subject%3A%22concrete%22
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Xu, Liangliang (author), Li, X. (author), Atif, Muhammad (author), Li, Yulong (author)
Foamed concrete is an essential material in engineering that can be categorized into two types based on density distribution, namely uniform foamed concrete (UFC) and gradient foamed concrete (GFC). However, there exists a research gap concerning the mesoscopic deformation mechanism of UFC and GFC. The objective of this research is to bridge...
journal article 2023
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Zhang, Chunbo (author), Hu, Mingming (author), van der Meide, Marc (author), Di Maio, F. (author), Yang, Xining (author), Gao, Xiaofeng (author), Li, Kai (author), Zhao, Hailong (author), Li, Chen (author)
Meeting the current demand for concrete requires not only mining tons of gravel and sand, but also burning large amounts of fossil fuel resources in cement kilning. Consequently, concrete recycling is crucial to achieving a material-efficient society, especially with the application of various categories of concrete and the goal of phasing...
journal article 2023
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Liang, M. (author), Li, Z. (author), He, S. (author), Chang, Z. (author), Gan, Y. (author), Schlangen, E. (author), Šavija, B. (author)
Stress evolution of restrained concrete is a significant direct index in early-age cracking (EAC) analysis of concrete. This study presents experiments and numerical modelling of the early-age stress evolution of Ground granulated blast furnace slag (GGBFS) concrete, considering the development of autogenous deformation and creep. Temperature...
journal article 2022
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Wang, Xinyue (author), Dong, Sufen (author), Li, Z. (author), Han, Baoguo (author), Ou, Jinping (author)
This study investigates the effects of nanofillers on the interfacial transition zone (ITZ) between aggregate and cement paste by using nanoindentation and statistical nanoindentation techniques. Moreover, the underlying mechanisms are revealed through micromechanical modeling. The nanoindentation results indicate that incorporating...
journal article 2022
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Li, Z. (author), Liang, X. (author), Liu, C. (author), Liang, M. (author), van Breugel, K. (author), Ye, G. (author)
This study investigates the deformation of free and stress of restrained alkali-activated slag concrete (AASC), respectively, under semi-adiabatic condition. The concrete shows first thermal expansion, which is compensated soon by autogenous shrinkage. The subsequent cooling down of the concrete aggravates shrinkage and development of tensile...
journal article 2022
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Lin, Chaoning (author), Li, Tongchun (author), Chen, Siyu (author), Yuan, Li (author), van Gelder, P.H.A.J.M. (author), Yorke-Smith, N. (author)
Dam safety monitoring has become an important topic and is critical for evaluating a dam's safety status. This study focuses on identifying the mechanical properties of a concrete dam from long-term viscoelastic deformation monitoring data. A novel inversion framework is proposed in which a surrogate model, instead of the finite element model,...
journal article 2022
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Zheng, Yonglai (author), Wen, Yuan (author), Pan, Tanbo (author), Liu, Yongcheng (author), Zhou, Yujue (author), Li, Ruizhi (author), Zhou, Y. (author)
This study investigated the relationship between the acoustic emission (AE) signals parameter sequence fractal characteristics and the damage evolution information of corroded reinforced concrete (RC) beams under four-point bending. Strength deterioration behavior and AE data can be obtained by coupling the four-point bending test and the AE...
journal article 2022
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Li, Shuguang (author), Jia, Jinsheng (author), Xu, Yaoqun (author), Zhai, Xiangjun (author), Li, Xiulin (author), Chen, Gaixin (author)
In order to evaluate the aging status of the dam concrete for a 25-years-old concrete dam, the internal concrete and surface layer of the dam were tested by elastic wave computerized tomography (CT) and spectral analysis of surface wave (SASW). Also mechanical strength and elastic wave velocity were tested for the concrete cores from the dam....
conference paper 2021
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Guo, Bingbing (author), Li, Z. (author), Fu, Qiang (author), Wang, Yan (author), Huang, Daguan (author), Niu, Ditao (author)
Utilizing coral aggregate concrete (CAC) for construction on remote islands can significantly reduce construction cost and period, CO<sub>2</sub> emission, and consumption of non-renewable energy. The durability of reinforced CAC structures is critically influenced by their resistance to chloride attack. In this study, a reactive transport...
journal article 2021
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Guo, Bingbing (author), Qiao, Guofu (author), Li, Z. (author), Li, Dongsheng (author), Dai, Jinghui (author), Wang, Yan (author)
Impressed current cathodic protection (ICCP) is an effective and direct method for controlling the corrosion of reinforced concrete (RC) structures. However, few investigations related to ICCP in cracked RC structures have been reported. In this study, the effect of cracks in concrete cover on ICCP of chloride-contaminated RC structures was...
journal article 2021
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Li, Z. (author), Delsaute, Brice (author), Lu, Tianshi (author), Kostiuchenko, A. (author), Staquet, Stéphanie (author), Ye, G. (author)
This study aims to compare the developments of mechanical properties and autogenous shrinkage related properties of alkali-activated materials-based concrete (AC) and ordinary Portland cement-based concrete (OC) against curing age and degree of reaction. Temperature Stress Testing Machines are utilized to monitor the evolution of the internal...
journal article 2021
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Gao, Yanmei (author), Li, Chengjun (author), Wang, Xuefei (author), Zhou, Zhixiang (author), Fan, Liang (author), Heng, J. (author)
This paper has investigated the shear-slip behaviour of an innovative prefabricated composite shear stud (PCSS) connector and its application in the prefabricated steel–concrete composite bridges. A series of push-out tests are carried out on a total of 12 specimens, including 6 PCSS specimens and 6 conventional shear stud (CSS) specimens....
journal article 2021
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Lu, T. (author), Li, Z. (author), Huang, H. (author)
Shrinkage-induced cracking can impair the durability of concrete structures. In the past few decades, this topic has drawn more and more attention. Shrinkage of mortar and concrete is actually the result of the interaction between the shrinking cement paste and the non-shrinking aggregates. In recent years, different models that consider the...
journal article 2021
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Li, Z. (author), Zhang, Shizhe (author), Liang, X. (author), Kostiuchenko, A. (author), Ye, G. (author)
Alkali activated concrete (AAC) has not received broader industry acceptance, one reason of which lies in the uncertainties in the durability against shrinkage and potential cracking. Many studies reported that AAC exhibit larger autogenous shrinkage than OPC concrete. However, it is unable to deduce that AAC should show higher cracking...
book chapter 2021
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Chen, Y. (author), Chaves Figueiredo, S. (author), Li, Z. (author), Chang, Z. (author), Jansen, K. (author), Copuroglu, Oguzhan (author), Schlangen, E. (author)
In 3D concrete printing (3DCP), it is necessary to meet contradicting rheological requirements: high fluidity during pumping and extrusion, and high stability and viscosity at rest to build the layered structure. In this paper, the impact of the hydroxypropyl methylcellulose (HPMC)-based viscosity-modifying admixture (VMA) on the 3D printability...
journal article 2020
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Chen, Y. (author), Romero Rodriguez, C. (author), Li, Z. (author), Chen, B. (author), Copuroglu, Oguzhan (author), Schlangen, E. (author)
This study aims to investigate the influences of different grades of calcined clay on 3D printability, compressive strength (7 days), and hydration of limestone and calcined clay-based cementitious materials. Calcined clays that contained various amounts of metakaolin were achieved by blending low-grade calcined clay (LGCC) and high-grade...
journal article 2020
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Liu, X. (author), Kasbergen, C. (author), Li, J (author), Scarpas, Athanasios (author)
The adhesive bonding strength of the membrane layers between the asphalt concrete surface layers and the decks of steel bridges has a strong influence on the fatigue life of orthotropic steel deck bridges (OSDBs). The most important requirement for the application of membrane materials to orthotropic steel deck bridges is that the membrane...
journal article 2020
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Liu, X. (author), Kasbergen, C. (author), Li, J (author), Scarpas, Athanasios (author), Tzimiris, G. (author)
The adhesive bonding strength of the membrane layers between the asphalt concrete surface layers and the decks of steel bridges has a strong influence on the fatigue life of orthotropic steel deck bridges (OSDBs). The interfacial properties between the membrane and the layers bonded to it have not been extensively studied in the current...
journal article 2020
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Li, Huajian (author), Huang, Fali (author), Yi, Zhonglai (author), Wang, Zhen (author), Zhang, Y. (author), Yang, Zhengxian (author)
Rheological properties are of significant importance in successful placement and performance of self-compacting concrete (SCC). In this work, the rheological properties of SCC, combined with a powder-viscosity modifying admixture, were investigated based on a series of experimental studies. The modified Bingham model was applied to determine...
journal article 2020
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Li, Z. (author), Zhang, Shizhe (author), Liang, X. (author), Ye, G. (author)
This study aims to investigate the cracking potential of alkali-activated slag (AAS) and alkali-activated slag-fly ash (AASF) concrete subjected to restrained autogenous shrinkage. Temperature Stress Testing Machine (TSTM) is utilized, for the first time, to monitor the stress evolution and to measure the cracking time of alkali-activated...
journal article 2020
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