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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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Ullmann, Stefan (author), Lowke, Dirk (author)The chloride migration coefficient is the most important material parameter for the service life prediction of reinforced concrete structures in exposure to chloride. For a comprehensive and precise prediction of the service life, however, further effects such as load-induced microcracks must be taken into account. Currently coupled effects like...conference paper 2021
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Saillio, M. (author), Baroghel-Bouny, V. (author), Bertin, M. (author), Mohamed, B. (author), Vincent, J. (author), D’Espinose de Lacaillerie, J.B. (author)The main cause of premature deterioration of reinforced concrete structures is the corrosion of steel bars, induced by chloride ions (for example in marine environment). At the same time, environmental-induced degradations of concrete can also affect the structure, such as external sulphate attack leading to the formation of ettringite, inducing...conference paper 2021
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Wang, Tiao (author), Luan, Yao (author)Reinforcement corrosion induced by chloride ingress is one of the major threats of reinforced concrete (RC) structures exposed to chloride attack. The cracks of concrete cover provide additional paths of chloride ingress and facilitate the reinforcement corrosion. Current information regarding the influence of crack development on corrosion...conference paper 2021
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Zuo, Chenjia (author), Liu, Yu (author), Liu, Yanbo (author)Transport of chlorides is one of the most critical factors determining the service life of concrete structures under ocean environments, and diffusion is usually regarded as the major mechanism for the transport of chloride ions into concrete. As chloride diffusivity is affected by temperature, most existing service life prediction models use...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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Liu, Qing-feng (author), Mao, Li-xuan (author), Hu, Zhi (author)Existing reinforced concrete structures experience severe durability degradation when subjected to alkali–silica reaction (ASR) and chloride attack. A special electrochemical rehabilitation treatment, containing lithium compound anolyte, has been developed to drive lithium ions into concrete as well as remove chlorides simultaneously, for...conference paper 2021
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Zhao, Jiaqi (author), Fan, Zhihong (author), Xiong, Jianbo (author)The error function solution of Fick’s second law assumes the constant surface chloride concentration, when it is used to calculate the apparent average chloride diffusion coefficient in concrete during the exposure period. However, the surface chloride concentration in concrete often vary with time. The purpose of this study is to investigate...conference paper 2021
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Ferjaoui, Khalil (author), Georget, Fabien (author), Scrivener, Karen (author)To reduce the CO2 footprint of construction materials, concrete producers blend their cement with Supplementary Cementitious Materials (SCMs). And even though such blended systems are eco-friendlier than the Ordinary Portland Cement (OPC), they are required to respect standards. In this context, understanding and predicting the durability of...conference paper 2021
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Xu, Zhiyuan (author), Zuo, Yibing (author), Ye, Guang (author)In this work, a numerical model is proposed to study chloride transport in alkali-activated materials. This model is based on multiple-relaxation-time lattice Boltzmann method, where particle distribution function is introduced to simulate the chloride binding and diffusion. This model takes into account diffusion, homogenous reaction between...conference paper 2021
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Scrivener, Karen (author), Georget, Fabien (author), Wilson, William (author), Sui, Shiyu (author)Cementitious Materials become more diverse. In particular, to reduce the CO2 emissions associate with production, it is necessary to increase the levels of replacement of clinker by other materials. A critical consideration is to know how durable different materials will be. Most forms of degradation involve the ingress of different species into...conference paper 2021
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Zhuang, Shiyu (author), Wang, Qiang (author)Water absorption is an indicator of other transport properties and even durability of concrete since it provides a dominant invasion mechanism for the penetration of aggressive ions. Relationship between the water absorption and the chloride ion penetration of concrete containing fly ash, slag and silica fume at various water-to-binder ratios is...conference paper 2021
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Georget, Fabien (author), Wilson, William (author), Soja, Wioletta (author), Zheng, Junjie (author), Scrivener, Karen (author)Quantitative predictions for durability issues are necessary to adapt the formulations of cement blends with novel supplementary cementitious materials. These predictions are usually carried out with reactive transport models which are solved at the macroscopic scale. Upscaling laws are necessary to ensure that effective transport properties...conference paper 2021
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Gonthier, Julien Nicolas (author), Wilson, William (author), Georget, Fabien (author), Scrivener, Karen (author)The incorporation of supplementary cementitious materials (SCMs) in cement pastes enables both decreasing CO2 emissions and increasing the concrete durability, notably with a better resistance against chloride ingress and thus retarding the chlorideinduced corrosion of steel rebars. Nevertheless, a better understanding of the chloride fixation...conference paper 2021
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Ishikawara, Kotaro (author), Miyamoto, Shintaro (author), Hayashi, Kensuke (author), Minagawa, Hiroshi (author), Hisada, Makoto (author)The purpose of this study is to clarify the performance of cement hardenings containing clinkers which are utilized as aggregate by evaluating the compressive strength and chloride ion penetration resistance of the mortars. Here, the fine aggregate used in this study were the ordinary Portland cement clinker and the clinker with more waste as an...conference paper 2021
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Paglia, C. (author), Antonietti, S. (author)In reinforced concrete structures carbonation and chloride ingress are two main phenomena that induce rebar corrosion. Agents such as CO2 gas or water containing chloride enter the cementitious material mainly throughout the pore system. The air permeability was measured with a non-destructive rapid test method. The aim of the present work was...conference paper 2021
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Kamat, Ameya (author), Lubelli, B. (author), Schlangen, E. (author)Sodium chloride (NaCl) is one of the ubiquitous soluble salts in the environment and is responsible for weathering of building materials. The salt weathering is attributed to the stress developed from crystallisation of these salts in pores of the building materials, with supersaturation as the driving force. In the last years, researchers have...conference paper 2021
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Kamat, Ameya (author), Abbas, Yawar (author), Blagojevic, Andrija (author), van Casteren, Toine (author), Walraven, J.C. (author)Service life of concrete infrastructure is severely compromised because of chloride-induced corrosion and measuring the chloride content is crucial to determine the remaining service life. DuraCrete provides a chloride ingress model based on Fick’s 2nd law. Although the diffusion coefficient is modelled as a time-dependent variable, the...conference paper 2021
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Xu, Z. (author), Zuo, Y. (author), Ye, G. (author)In this work, a numerical model is proposed to study chloride transport in alkali-activated materials. This model is based on multiple-relaxation-time lattice Boltzmann method, where particle distribution function is introduced to simulate the chloride binding and diffusion. This model takes into account diffusion, homogenous reaction between...conference paper 2021
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Zhang, H. (author), Schlangen, E. (author), Ge, Zhi (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