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Romero Rodriguez, C. (author), Chaves Figueiredo, S. (author), França de Mendonça Filho, F. (author), Schlangen, E. (author), Šavija, B. (author)
The potential of using phase change materials (PCM) in cementitious materials to mitigate damage due to thermal loadings has been recently focus of intensive research. In the case of PCM with transition temperatures near to the freezing point of water, their potential to delay frost in a cementitious matrix has been largely investigated through...
conference paper 2019
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Xu, Y. (author), Schlangen, E. (author), Šavija, B. (author)
Strain hardening cementitious composites are a class of cementitious materials showing metal-like (i.e. pseudo-plastic) behavior in tension due to their multiple cracking ability. This is commonly achieved through use of fiber reinforcement (such as PVA) or, similarly, textile reinforcement (TRC). Increasing the ductility is important in...
conference paper 2019
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Xu, Y. (author), Šavija, B. (author), Schlangen, E. (author)
Traditionally, mechanical properties of cementitious materials are designed<br/>“chemically”, namely by configuring their mix proportions. Owning to the development of 3D printing technology, “physical” tailoring the meso-structure of cementitious materials to design their mechanical properties becomes possible. In the present study,...
conference paper 2019
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Zhang, H. (author), Schlangen, E. (author), Šavija, B. (author)
This work aims to investigate the mechanical properties of the cement paste-aggregate interface by combining experimental and numerical approaches. The multi-phase interface microstructure was obtained by X-ray computed tomography (XCT) and submitted to a discrete fracture lattice model for fracture analysis. Apart from the modelling, a...
conference paper 2019
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Chang, Z. (author), Zhang, H. (author), Schlangen, E. (author), Šavija, B. (author)
The aim of this work is to investigate the fracture process of concrete under various boundary conditions. Although numerous concrete fracture tests have been reported, showing the failure behavior of concrete, their evaluation is ambiguous due to the limitations of specimen size and experimental conditions. Therefore, it is necessary to use...
conference paper 2019
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Gan, Y. (author), Zhang, H. (author), Šavija, B. (author), Schlangen, E. (author), van Breugel, K. (author)
Nanoindentation is usually used to investigate local elastic properties and hardness of materials. In this paper, the nanoindenter served as a loading tool to perform micro scale bending tests and measure the global response of micro-scale specimens. For testing, cement paste cantilever beams with a square cross-section of 300 μm × 300 μm were...
conference paper 2019
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Lukovic, M. (author), Ye, G. (author), Schlangen, E. (author), van Breugel, K. (author)
Infrastructure is ageing and we are facing a serious challenge on how to deal with it. One possible solution is to repair it, but the life of current concrete repairs, including all types of repairs and application of different materials, is not satisfactory and there is an urgent need for improvement. Understanding the damage development in a...
conference paper 2019
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Mercuri, L. (author), Romero Rodriguez, C. (author), Xu, Y. (author), Chaves Figueiredo, S. (author), Mors, R.M. (author), Rossi, E. (author), Anglani, G. (author), Antonaci, P. (author), Šavija, B. (author), Schlangen, E. (author)
Soft inclusions, such as capsules and other particulate admixtures are increasingly being used in cementitious materials for functional purposes (i.e. self-healing and self-sensing of concrete). Yet, their influence on the fracture behaviour of the material is sometimes overlooked and requires in-depth study for the optimization of mechanical...
conference paper 2019
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Zhang, H. (author), Schlangen, H.E.J.G. (author), Šavija, B. (author)
Cement paste is the glue that holds concrete together and any improvements in material performance will come from its microstructure. For better understanding and predicting its elastic properties and fracture performance, more and more studies are carried out based on micromechanics simulations. However, the predicted results can be hardly...
conference paper 2018
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Romero Rodriguez, C. (author), Chaves Figueiredo, S. (author), Schlangen, H.E.J.G. (author), Snoeck, D (author)
The ability of Superabsorbent Polymers (SAP) to block water flow along cracks in cement-based materials has become an attractive feature of these admixtures. The diminution of fl w rates in such composites are attributed to the capacity of the SAPs to absorb water and swell in the crack, but no evidence exists in literature that indicates one or...
conference paper 2018
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Sherzer, G. (author), Gal, B. (author), Schlangen, H.E.J.G. (author), Ye, G. (author)
The mechanical response of concrete is complex and as other composite materials, multiscale modelling has the potential for modeling its macroscopic behavior. This paper presents an upscaling methodology for the model-ling of the concrete mechanical properties. The suggested formulation starts from a known chemical and mechanical set of...
conference paper 2018
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Chen, Y. (author), Veer, F.A. (author), Copuroglu, O. (author), Schlangen, H.E.J.G. (author)
In conventional concrete, replacing high-volume (more than 45%) of ordinary Portland cement (OPC) by supplementary cementitious materials (SCMs) is not a novel CO2 reduction method, whereas rarely in 3D printable concrete. This study attempts to explore the feasibility of using SCMs in 3D printable concrete. Initially, the existing binder mixes,...
conference paper 2018
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Tabakovic, A. (author), Schlangen, H.E.J.G. (author)
This paper presents a unique self-healing system for asphalt pavement which employs compartmented calcium-alginate fibres encapsulating an asphalt binder healing agent (rejuvenator). This system presents a novel method of incorporating rejuvenators into asphalt pavement mixtures. The compartmented fibres are used to distribute the rejuvenator...
conference paper 2018
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Xu, S. (author), Liu, X. (author), Tabakovic, A. (author), Schlangen, H.E.J.G. (author)
Incorporating self-healing technology in asphalt pavement has been demonstrated to have great potential to prolong its service life. To this aim, the calcium alginate capsules encapsulating rejuvenator were manufactured and proved to have sufficient thermal stability and mechanical resistance to survive the asphalt production and compaction...
conference paper 2018
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Mafalda Matos, Ana (author), Chaves Figueiredo, S. (author), Nunes, Sandra (author), Schlangen, H.E.J.G. (author)
Fibre reinforced cementitious composites (FRCC) may be characterized by their improved performance namely in terms of tensile ductility, accompanied by multiple cracking, and potentially lower permeability to liquid and gas in cracked state. Cracking, which is nearly inevitable, can occur due to applied structural loading, shrinkage, chemical...
conference paper 2018
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Mazaheripour, Hadi (author), Faria, Rui (author), Azenha, Miguel (author), Ye, G. (author), Schlangen, H.E.J.G. (author)
Exposing reinforced concrete (RC) structures to aggressive environmental conditions is one of the main reasons that may limit their service life. Diffusion of chloride ions through concrete cover is one of the most damaging environmental actions, since it may cause corrosion of steel reinforcement. Therefore, modelling this phenomenon allows...
conference paper 2018
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Lukovic, M. (author), Huang, Z. (author), Hordijk, D.A. (author), Schlangen, H.E.J.G. (author)
Strain Hardening Cementitious Composite (SHCC) is an innovative material which, due to the special material composition and the addition of fibres, exhibits a controlled microcracking behaviour under tensile stresses. As such it might be a promising material for improvement of durability of concrete structures.<br/>An experimental study was...
conference paper 2018
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Lyu, W. (author), Schlangen, H.E.J.G. (author), van Breugel, K. (author)
In order to gain a better understanding of the interaction between creep and micro-cracking during long-term creep process, a theoretical study was performed. An existing lattice model was modified to take creep into account. Based on the model, the micro-cracking in the creep process was simulated on a three-phase concrete sample under...
conference paper 2018
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Zhang, H. (author), Šavija, B. (author), Schlangen, E. (author)
This work proposes a new method for micromechanical simulation of cement paste based on a combination of statistical nanoindentation and XCT technique without the need for explicit identification of distinct phases. A linear relationship between the greyscale level and local Young’s modulus was assumed and verified by the two-sample Kolmogorov...
conference paper 2018
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Huigen, Vincent (author), Xu, Y. (author), Schlangen, E. (author), Šavija, B. (author)
In order to improve the behaviour of cementitious material under in bending, 3D printed polymeric lattice meshes were used as an alternative to fibre reinforcement. Lattice meshes with different cell sizes and different surface roughness were designed and printed. Plain mortar samples and reinforced samples were casted. After curing, 4-point...
conference paper 2018
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