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Influence of different corrosion solutions on reinforced concrete by DIC and traditional strain test

Wang, XiaoX (author), Liu, JiaP (author), Zhong, PeiH (author)

When the corrosion expansion stress of the steel reinforcement exceeds the ultimate tensile strength of the concrete, the concrete will crack and eventually cause structural damage. Therefore, direct characterization methods of steel corrosion expansion stress can help predict the concrete cracking time, prevent corrosion expansion and repair...

conference paper 2021

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Interface between cementitious matrix and fibres influenced by the modification of fibre surface

Antonova, Anna (author), Eik, Marika (author), Jokinen, Ville (author), Punkki, Jouni (author), Puttonen, Jari (author)

The performance of fibre reinforced cementitious composites depends on the interaction between the cementitious matrix and the fibres on the micro-scale. This interaction is affected by the material and surface properties of the fibre and the micro-scale characteristics of the cementitious matrix close to the fibre surface, creating the...

conference paper 2021

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Strain hardening behaviour of PVA fibre reinforced geopolymer composites

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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Microstructural study of a UHPFRC incorporating ECat

Abrishambaf, A. (author), Costa, C (author), Nunes, S. (author), Pimentel, M. (author)

Ultra-high performance fibre reinforced cementitious composites (UHPFRC) is a family of advanced cementitious materials with optimized matrix packing density, very low water/binder ratio (w/b<0.2) and containing a significant amount of steel fibres. In the development of UHPFRC mixtures, the typically high amount of cement (700-1000 kg/m3) and...

conference paper 2021

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A study of the elastic moduli and chemical composition of corrosion product naturally-generated due to chlorides through nano-indentation and energy dispersive X-ray spectrometry (EDS)

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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Contact between cementitious matrix and fibres influenced by the modification of their parameters

Antonova, Anna (author), Eik, Marika (author), Punkki, Jouni (author), Jokinen, Ville (author), Puttonen, Jari (author)

The performance of fibre reinforced cementitious composites depends on the interaction between the cementitious matrix and the fibres on the micro-scale. This interaction is affected by the material and surface properties of the fibre and the micro-scale characteristics of the cementitious matrix close to the fibre surface, creating the...

conference paper 2021

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The influence of lightweight functional aggregates on the acidification damage in the external anode mortar during cathodic protection for reinforced concrete

Guo, Wenhao (author), Hu, Jie (author), Ma, Yuwei (author), Huang, Haoliang (author), Wei, Jiangxiong (author), Yu, Qijun (author)

Impressed current cathodic protection (ICCP) is an effective corrosion protection and prevention technique for reinforced concrete structures served in chloride-contaminated environment. The acidification damage in the external anode mortar caused by the anodic reactions significantly influences the efficiency of ICCP for reinforced concrete....

conference paper 2021

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Modelling effect of coarse aggregates on oxygen transport and corrosion products precipitation in reinforced concrete

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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Demolition and recycling of carbon reinforced concrete

Jehle, Peter (author), Kortmann, Jan (author), Kopf, Florian (author), Bienkowski, Natalia (author)

Carbon reinforced concrete is an artificially produced composite construction material consisting of two components: concrete and continuous carbon filaments formed as roving fabric or bars. The research project C³-V1.5 “Demolition, Dismantling and Recycling” aims to answer the key questions regarding the LCA. Under the leadership of the ...

conference paper 2017

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Concrete Flow in Diaphragm Wall Panels: A Full-Scale In-Situ Test

Flow processes, taking place during the concreting of diaphragm wall panels (D-wall panels), are of great importance for the quality of the wall. During this phase, the bentonite, present in the excavated trench, should be completely replaced by concrete in a controlled way. In literature several cases are described in which this process...

conference paper 2015

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Concrete Flow in Diaphragm Wall Panels: A Full-Scale In-Situ Test

Van Dalen, J.H. (author), Bosch, J.W. (author), Broere, W. (author)

Flow processes, taking place during the concreting of diaphragm wall panels (D-wall panels), are of great importance for the quality of the wall. During this phase, the bentonite, present in the excavated trench, should be completely replaced by concrete in a controlled way. In literature several cases are described in which this process...

conference paper 2015

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Influence of Model Accuracy on Load and Resistance Factor Calibration of Steel Strip Walls

Miyata, Y. (author), Bathurst, R.J. (author), Otani, Y. (author)

This study examines the load and resistance factor design calibration for the ultimate pullout limit state for steel strip reinforced soil walls (SSWs). The tensile loads and pullout capacities of reinforcement strips that were measured during full-scale tests are compared with predicted (nominal) values using analytical models recommended by...

conference paper 2015

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Fibrous Morphologies: Integrative design and fabrication of fibre-reinforced structures in architecture using robotic filament winding

Weigele, J. (author), Schloz, M. (author), Schwinn, T. (author), Reichert, S. (author), LaMagna, R. (author), Waimer, F. (author), Knippers, J. (author), Menges, A. (author)

Living organisms have evolved effective structural solutions in response to the inherent constraints of their respective environments through a process of morphological adaptation. Given the fact that the majority of natural load bearing materials are fibrous composites, the authors suggest the analysis of appropriate biological role models as a...

conference paper 2013

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Self-healing of impact damage in 3d micromolecular composites

Hart, K.R. (author), Wetzel, E.D. (author), Sottos, N.R. (author), White, S.R. (author)

Abstract only.

conference paper 2013

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Metal triflates as catalytic curing agents in self-healing fibre reinforced polymer composite materials

Coope, T. (author), Bond, I. (author), Trask, R. (author), Wass, D. (author)

High performance, damage tolerant fibre reinforced polymer (FRP) composite materials are currently required to demonstrate no propagation of any sub-surface structural micro-cracking when under service load, thereby encouraging overdesign and limiting the inherent lightweight nature of such a material. By incorporating selfhealing...

conference paper 2013

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Self-healing in woven composite laminates via bioinspired microvascular networks

Patrick, J.F. (author), Hart, K.R. (author), Krull, B.P. (author), Moore, J.S. (author), Sottos, N.R. (author), White, S.R. (author)

Abstract only.

conference paper 2013

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Self-healing behavior of fiber-reinforced self-healing ceramics

Sugiyama, S. (author), Nakao, W. (author)

The alumina fiber reinforced alumina containing the interlayer of SiC as healing agent was found to have self-healing ability for the delimitation of the fiber/matrix interface. Main crack in the composite is branched to fiber/matrix interface when the main crack reached the interface, because the interlayer has lower strength than those of the...

conference paper 2013

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Proton-coupled mechanochemical transduction-mechanogenerating acids

Diesendruck, C.E. (author), Moore, J.S. (author)

Abstract only.

conference paper 2013

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Most recent advances in the field of self-healing cementitious materials

Van Tittelboom, K. (author), Snoeck, D. (author), Wang, J. (author), De Belie, N. (author)

While the Japanese researchers Ohama et al. [1] already mentioned in 1992 that a self-healing effect was noticed when polymer-modified concrete without hardener was made, the real pioneer in the research on self-healing concrete is Carolyn Dry from Illinois. The first time she proposed the use of encapsulated polymers to obtain self-healing...

conference paper 2013

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Damage redirection and healing in skin-stiffener debonding specimens under fatigue conditions

Luterbacher, R. (author), Bond, I.P. (author), Trask, R.S. (author)

Locally stiffened or ‘stringer’ - skin composite structures are extensively used for lightweight applications in the aerospace industry. Due to localised stiffening, stress concentrations arise which can initiate damage e.g. debonding or delamination, within the composite structure. Critically, this damage can propagate under fatigue loading...

conference paper 2013