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Ying, Shen (author), Sun, Hanrui (author), Li, Chengpeng (author), Zhang, Wenting (author), Wang, Meng (author), Zhan, Yong (author), Zhang, Yu (author), Chen, Xueye (author)
Many immigrants from rural areas pour into urban areas, especially in China, and urban development faces the challenges to provide sufficient space for citizens’ acommodation, works and social contacts. So 3D development and use of land and city space become the reality with various complex buildings and constructions with modern architecture...
conference paper 2021
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Zhang, H. (author), Wahls, S. (author), Brühl, M. (author)
In the past decade, observations in the German estuaries such as the rivers Elbe and Weser show increasingly serious damage to bank protection structures (groins and revetments). This damage is caused mainly by waves induced by the passing of big container ships in the shallow and narrow maritime waterways. These ship-induced 3D wave fields...
conference paper 2021
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Sun, Yubo (author), Chen, Boyu (author), Zhang, Shizhe (author), Blom, Kees (author), Luković, Mladena (author), Ye, Guang (author)
In recent years, the rapid industrialization and urbanization led to the explosive growth of municipal solid waste incineration (MSWI) bottom ashes (BA) production. However, most of them are directly landfilled, which not only brings environmental burden but also results in loss of potential resources. Present researches have proved that MSWI BA...
conference paper 2021
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Wang, Yi (author), Zhang, Mingzhong (author)
Strain hardening geopolymer composites (SHGC) as a tailored group of fibre reinforced geopolymer composites are featured by large tensile strain capacity with multiple micro-cracks. This paper experimentally investigates the strain hardening behaviour of SHGC in terms of flexural stress-deflection response, failure mode and cracking, flexural...
conference paper 2021
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Zhai, Shengtian (author), Zhang, Yunsheng (author)
Graphene cement-based composites have become a hot topic in current research because of its superior comprehensive performance. In this work, incorporation of different content of graphene in cement-based materials can significantly improve its compressive and flexural strength. Meanwhile hydration heat with different graphene content and times...
conference paper 2021
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Zhang, Jingxiao (author), Ma, Yuwei (author), Zheng, Jiazheng (author)
The widespread application of alkali-activated fly ash/slag (AAFS) concrete requires satisfaction of a series of performance criteria both from its early age properties (e.g. workability, strength) and long-term stability. In this study, long-term (till 180 days) natural chloride diffusion tests were conducted to evaluate the chloride diffusion...
conference paper 2021
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Li, Zhenming (author), Wyrzykowski, Mateusz (author), Dong, Hua (author), Zhang, Shizhe (author), Lura, Pietro (author), Ye, Guang (author)
Alkali activated slag (AAS) has shown promising potential to replace ordinary Portland cement as a binder material. Synthesized from industrial by-products, AAS can show high strength, thermal resistance and good durability. However, AAS has been reported to exhibit high autogenous shrinkage. Autogenous shrinkage is a critical issue for building...
conference paper 2021
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Zhang, H. (author), Schlangen, E. (author), Ge, Z. (author), Šavija, B. (author)
Properties of concrete are, to a large extent, dependent on the properties of its binding constituent, hydrated cement paste. Therefore, knowledge of properties of hydrated cement paste is crucial for predicting concrete behaviour. This paper presents an experimentally informed approach for modelling elastic and transport properties of cement...
conference paper 2021
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Rossi, Emanuele (author), Zhang, Hongzhi (author), Çopuroğlu, Oğuzhan (author), Polder, Rob B. (author), Šavija, Branko (author), Nijland, Timo G. (author)
An important input parameter for numerical models that simulate cracking of the concrete cover due to reinforcement corrosion is the Elastic modulus of corrosion product (Ecp). Despite its relevance, Ecp is subject of significant variations according to the values reported in the literature, which vary from less than 100 MPa up to 360 GPa....
conference paper 2021
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Zuo, Chenjia (author), Zhang, Yixiang (author), Tong, Yudong (author), Liu, Yanbo (author)
Synthetic fibers have been widely studied as reinforcing materials to increase the mechanical and durability properties of concrete. According to its diameter, fibers can be categorized as micro and macro (or coarse) fibers. As most research focuses on the mechanical properties of fiber reinforced concrete, its chloride permeability properties...
conference paper 2021
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Jin, Peng (author), Wang, Ruixing (author), Zhang, Siyi (author), Dong, Hua (author), Chen, Chun (author)
Carbonation has been proven to be a promising way to improve the mechanism properties and durability of steel slag products. CA bacteria can promote the hydration of CO2. In this study, one kind of alkali-resistant CA bacteria was chosen to investigate its effects on the carbonation process of γ-C2S. Results showed that bacteria could increase...
conference paper 2021
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Wang, Wei (author), Zhang, Shizhe (author), Guang, Ye (author), Noguchi, Takafumi (author)
Alkali activated materials (AAMs) have received worldwide attention due to its lower embodied energy and environmental impact than that of traditional cementitious materials. However, the activators with high alkalinity may raise the risk of alkali silica reaction (ASR) induced deterioration when reactive aggregates are used, which thereby...
conference paper 2021
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Han, Weiwei (author), Chen, Huisu (author), Zhang, Tao (author)
Magnesium ammonium phosphate cement (MAPC) has been commonly applied in civil engineering. However, the analysis of hydration behavior and composition of solid assemblages still needs further exploration. From thermodynamic simulation, it is shown that the molar ratio between MgO and NH4H2PO4 (M/P ratio) determines the final composition of...
conference paper 2021
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Zhang, Zhidong (author), Angst, Ueli M. (author)
The structure of concrete, in particular the microstructure of the steel-concrete interface (SCI), can significantly affect corrosion of rebars. To support corrosion, oxygen needs to diffuse from the ambient environment to the steel surface. Meanwhile, corrosion products transport through the SCI and precipitate in concrete. Transport properties...
conference paper 2021
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Zhang, C. (author), Deng, Z.C. (author), Zhang, Y.M. (author), Chen, C. (author)
This paper develops an empirical model to predict the static yield stress of 3D printing mortar based on the flowability of paste and excess paste thickness. The components of the mortar are divided into paste and aggregate. The relation between the yield stress of mortar and the yield stress of paste and the excess paste thickness is...
conference paper 2021
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Kruijff, Michiel (author), Breukelman, Pim (author), Williams, Paul (author), Zhang, Yannan (author), Bonnin, Vincent (author)
conference paper 2019
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Zhang, Jiyi (author), Li, Gang (author), Liu, Youzhi (author), Yin, Pengcheng (author), Yu, Jinyu (author), Shi, Zhifeng (author)
Since the introduction of the concept of 3D cadastre, a great many of significant research results have been done. To promote the development of 3D cadatre, 3D cadastre working group sponsored by International Federation Surveyors (FIG) commissions 3 and 7 was organized by Delft University of Technology in 2001. This working group provides a...
conference paper 2018
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Gao, L. (author), Zhang, L.M. (author), Chen, H.X. (author)
Due to hilly terrain and frequent heavy rainstorms, debris flow is one of the most common and catastrophic hazards in Hong Kong. To mitigate the debris flow risk, prediction of the magnitude and consequence of debris flow is essential. The objective of this paper is to simulate debris flow hazards in a study area in Hong Kong. Assessment of the...
conference paper 2015
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Zhu, Y. (author), Peng, M. (author), Shi, Z. (author), Zhang, L. (author)
The 2008 Mw 7.9 Wenchuan earthquake triggered at least 257 landslide dams, most of which formed in series along rivers. The failure of an upstream dam could cause the failure of dams downstream one after another. The cascade dam breaching may result in sharp increase of flood and more serious damage downstream. This paper aims to analyze the...
conference paper 2015
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Danka, J. (author), Zhang, L. (author)
Dike breaching parameters are important to support dike flood risk management, and can be estimated rapidly using empirical models. Due to the lack of dike specific models, sometimes models for man-made dams were used without validation. This paper compares relevant factors of dike, man-made dam and landslide dam breaches. With the aid of two...
conference paper 2015
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