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ASR: Insights into the cracking process via lattice fracture simulation at mesoscale based on the chemical reactions at microscale

Qiu, Xiujiao (author), Chang, Z. (author), Chen, J. (author), Schlangen, E. (author), Ye, G. (author), Schutter, Geert De (author)

In our former paper, based on a published 3D reactive transport model at microscale with the capability of simulating the chemical reactions involved in ASR, the location of expansive ASR gel related to the reactivity of aggregate, temperature, aggregate porosity and silica content in aggregate, is clarified. Based on the simulation results,...

journal article 2023

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Incorporating elastic and creep deformations in modelling the three-dimensional autogenous shrinkage of cement paste

Gao, Peng (author), Ye, G. (author), Huang, Haoliang (author), Qian, Zhiwei (author), Schlangen, E. (author), Wei, Jiangxiong (author), Yu, Qijun (author)

A structure-based modelling framework was established to simulate the three-dimensional autogenous shrinkage of cement paste. A cement hydration model, HYMOSTRUC3D-E, was used to obtain the microstructures and ionic concentrations of the cement paste. A lattice fracture model based on the effective stress and effective modulus was used to...

journal article 2022

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The role of porosity on degradation of concrete under severe internal and external brine attack in confined conditions

Sherzer, G. Lifshitz (author), Ye, G. (author), Schlangen, E. (author), Kovler, K. (author)

It has been observed that a trench wall embedded in the soil of the Dead Sea has lost strength and is deteriorating due to brine attack. This phenomenon demonstrates that concrete wall structural stability and durability can be seriously endangered. Yet conventional analysis using macroscopic models is considered an oversimplification, as it...

journal article 2022

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Accelerated carbonation of ordinary Portland cement paste and its effects on microstructure and transport properties

Romero Rodriguez, Claudia (author), Ye, Rui (author), Varveri, Aikaterini (author), Rossi, Emanuele (author), Anglani, Giovanni (author), Antonaci, Paola (author), Schlangen, Erik (author), Šavija, Branko (author)

Coupling of carbonation and chlorides ingress mechanisms is very common in concrete under certain exposure conditions such as coastal environments. The aggravation/ mitigation of corrosion by the existence of carbonation lies on the fact that microstructural changes due to carbonation result in changes on the transport properties of the material...

conference paper 2021

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Accelerated carbonation of ordinary Portland cement paste and its effects on microstructure and transport properties

Romero Rodriguez, C. (author), Ye, R. (author), Varveri, Aikaterini (author), Rossi, E. (author), Anglani, Giovanni (author), Antonaci, Paola (author), Schlangen, E. (author), Šavija, B. (author)

Coupling of carbonation and chlorides ingress mechanisms is very common in concrete under certain exposure conditions such as coastal environments. The aggravation/ mitigation of corrosion by the existence of carbonation lies on the fact that microstructural changes due to carbonation result in changes on the transport properties of the material...

conference paper 2021

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Evaluating compressive mechanical LDPM parameters based on an upscaled multiscale approach

Lifshitz Sherzer, G. (author), Schlangen, E. (author), Ye, G. (author), Gal, A. E. (author)

We propose an upscaled methodology for evaluating the compressive parameters of the Lattice Discrete Particle Model (LDPM) for a multiscale analysis of concrete structures. This methodology is based on mechanical and chemical models on a wide range of concrete scales. We show that the compressive mechanical parameters are related mainly to...

journal article 2020

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Strain-Hardening Cementitious Composite (SHCC) For Durable Concrete Repair

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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Microstructure-based prediction of the elastic behaviour of hydrating cement pastes

Mazaheripour, Hadi (author), Faria, Rui (author), Ye, G. (author), Schlangen, E. (author), Granja, José (author), Azenha, Miguel (author)

The development of the elastic properties of a hardening cement paste results from the microstructural evolution due to cement hydration. The elastic behaviour of cement paste can be predicted by a combination of the hydration model and micromechanical analysis, which originates from a microstructural representative volume where the elastic...

journal article 2018

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Multi-scale modelling of the mechanics of concrete based on the cement paste properties

Sherzer, G. (author), Gal, B. (author), Schlangen, E. (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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Microstructure-based 3D modelling of diffusivity in sound and cracked cement paste

Mazaheripour, Hadi (author), Faria, Rui (author), Azenha, Miguel (author), Ye, G. (author), Schlangen, E. (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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Modeling framework for fracture in multiscale cement-based material structures

Qian, Zhiwei (author), Schlangen, E. (author), Ye, G. (author), van Breugel, K. (author)

Multiscale modeling for cement-based materials, such as concrete, is a relatively young subject, but there are already a number of different approaches to study different aspects of these classical materials. In this paper, the parameter-passing multiscale modeling scheme is established and applied to address the multiscale modeling problem...

journal article 2017

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Upscaling Cement Paste Microstructure to Obtain the Fracture, Shear, and Elastic Concrete Mechanical LDPM Parameters

Sherzer, G. (author), Gao, P. (author), Schlangen, E. (author), Ye, G. (author), Gal, E. (author)

Modeling the complex behavior of concrete for a specific mixture is a challenging task, as it requires bridging the cement scale and the concrete scale. We describe a multiscale analysis procedure for the modeling of concrete structures, in which material properties at the macro scale are evaluated based on lower scales. Concrete may be viewed...

journal article 2017

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Moisture movement in cement-based repair systems monitored by X-ray absorption

Lukovic, M. (author), Ye, G. (author), Schlangen, E. (author), van Breugel, K. (author)

In concrete repair systems, material properties in the repair material and interface are greatly influenced by the initial moisture content of the concrete (or mortar) substrate. In order to quantify moisture profiles inside the repair system, X-ray absorption was used. Preliminary studies are performed first to determine the absorption rate of...

journal article 2017

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Failure Modes in Concrete Repair Systems due to Ongoing Corrosion

Lukovic, M. (author), Šavija, B. (author), Ye, G. (author), Schlangen, E. (author), van Breugel, K. (author)

Corrosion of steel reinforcement is the main cause of deterioration in reinforced concrete structures. It can result in cracking and spalling of the concrete cover. After the damaged cover is repaired, reinforcement corrosion might continue and even accelerate. While the development of the corrosion cell is difficult to control, the damage can...

journal article 2017

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A 3D Lattice Modelling Study of Drying Shrinkage Damage in Concrete Repair Systems

Lukovic, M. (author), Šavija, B. (author), Schlangen, E. (author), Ye, G. (author), van Breugel, K. (author)

Differential shrinkage between repair material and concrete substrate is considered to be the main cause of premature failure of repair systems. The magnitude of induced stresses depends on many factors, for example the degree of restraint, moisture gradients caused by curing and drying conditions, type of repair material, etc. Numerical...

journal article 2016

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Using nano-indentation and microscopy to obtain mechanical properties

Lukovic, M. (author), Schlangen, E. (author), Savija, B. (author), Ye, G. (author), Copuroglu, O. (author)

Simulation of mechanical behaviour of heterogeneous materials is only possible if the local properties of the components are known. In recent years nano-indentation is being applied on different levels to obtain local mechanical properties. The aim of this paper is to explore various ways to obtain these properties by combining nano-indentation...

conference paper 2015

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Micromechanical study of the interface properties in concrete repair systems

Lukovic, M. (author), Savija, B. (author), Dong, H. (author), Schlangen, E. (author), Ye, G. (author)

journal article 2014

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A modelling study of drying shrinkage damage in concrete repair systems

Lukovic, M. (author), Savija, B. (author), Schlangen, E. (author), Ye, G. (author), van Breugel, K. (author)

Differential shrinkage between repair material and concrete substrate is considered to be the main cause of premature failure of repair systems (Martinola, Sadouki et al. 2001, Beushausen and Alexander 2007). Magnitude of induced stresses depends on many factors, for example the amount of restraint, moisture gradients caused by different curing...

conference paper 2014

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Impact of surface roughness on the debonding mechanism in concrete repairs

Lukovic, M. (author), Schlangen, H.E.J.G. (author), Ye, G. (author), Savija, B. (author)

Surface roughness of the existing concrete substrate was considered to have the greatest impact on the bond strength in repair systems. However, the influence of this parameter has been subject for debates in recent years. The effect of concrete surface roughness is not quite clear, nor there exist a clear relation between the surface roughness...

conference paper 2013

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Multiscale lattice fracture model for cement-based materials

Qian, Z. (author), Schlangen, E. (author), Ye, G. (author), Van Breugel, K. (author)

Cracking in cement-based materials is usually not easy to predict, because of the complexity of their microstructures. Concrete is a composite material of mortar and coarse aggregates, and mortar consists of cement paste and sands. The fracture processes in these materials are related, and this paper aims to reveal the relationship by developing...

conference paper 2012