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Design and analyses of printable strain hardening cementitious composites with optimized particle size distribution

van Overmeir, A.L. (author), Chaves Figueiredo, S. (author), Šavija, B. (author), Bos, Freek P. (author), Schlangen, E. (author)

Since the advent of three-dimensional concrete printing (3DCP), several studies have shown the potential of strain hardening cementitious composites (SHCC) as a self-reinforcing printable mortar. However, only a few papers focus on achieving sufficient buildability when developing printable SHCC. This study investigates the role of the...

journal article 2022

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Chloride Ion Penetration into Cracked UHPFRC During Wetting-drying Cycles

Matos, Ana Mafalda (author), Nunes, Sandra (author), Chaves Figueiredo, S. (author), Schlangen, E. (author), Aguiar, José L.Barroso (author)

The subject of this paper is the extent to which, during wetting–drying cycles, chloride ions can penetrate Ultra-high-Performance Fibre Reinforced Cementitious Composites (UHPFRC) specimens subjected to combined mechanical and environmental load. Pre-cracking was obtained by subjecting prismatic specimens (40 × 40 × 60mm³) to four...

book chapter 2021

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Durability of an UHPFRC under mechanical and chloride loads

Matos, Ana Mafalda (author), Chaves Figueiredo, S. (author), Nunes, Sandra (author), Schlangen, E. (author), Barroso-Aguiar, José L. (author)

The high cost of UHPFRC is a limitation on the practical application in real construction projects. However, a very competitive UHPFRC approach is the hybrid structural elements, where thin layers of UHPFRC are employed to rehabilitate/strengthen damage cover concrete. New layers subjected to harsh conditions (loads and/or environmental) can...

journal article 2021

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Fundamental investigation on the frost resistance of mortar with microencapsulated phase change materials

Romero Rodriguez, C. (author), França de Mendonça Filho, F. (author), Chaves Figueiredo, S. (author), Schlangen, E. (author), Šavija, B. (author)

Recent studies have shown that concrete containing Phase Change Materials (PCM) with low transition temperatures may reduce the number of freeze/thaw cycles suffered by the cementitious composite in temperate climates. Nevertheless, the positive influence of such admixtures on the frost resistance of cement-based materials has not been...

journal article 2020

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Improving printability of limestone-calcined clay-based cementitious materials by using viscosity-modifying admixture

Chen, Y. (author), Chaves Figueiredo, S. (author), Li, Z. (author), Chang, Z. (author), Jansen, K. (author), Copuroglu, Oguzhan (author), Schlangen, E. (author)

In 3D concrete printing (3DCP), it is necessary to meet contradicting rheological requirements: high fluidity during pumping and extrusion, and high stability and viscosity at rest to build the layered structure. In this paper, the impact of the hydroxypropyl methylcellulose (HPMC)-based viscosity-modifying admixture (VMA) on the 3D printability...

journal article 2020

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Mechanical behavior of printed strain hardening cementitious composites

Chaves Figueiredo, S. (author), Romero Rodriguez, C. (author), Ahmed, Zeeshan Y. (author), Bos, Derk H. (author), Xu, Y. (author), Salet, Theo M. (author), Copuroglu, Oguzhan (author), Schlangen, E. (author), Bos, Freek P. (author)

Extrusion based additive manufacturing of cementitious materials has demonstrated strong potential to become widely used in the construction industry. However, the use of this technique in practice is conditioned by a feasible solution to implement reinforcement in such automated process. One of the most successful ductile materials in civil...

journal article 2020

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Deformation and fracture of 3D printed disordered lattice materials: Experiments and modeling

Xu, Y. (author), Zhang, H. (author), Šavija, B. (author), Chaves Figueiredo, S. (author), Schlangen, E. (author)

A method is presented to model deformation and fracture behavior of 3D printed disordered lattice materials under uniaxial tensile load. A lattice model was used to predict crack pattern and load-displacement response of the printed lattice materials. To include the influence of typical layered structures of 3D printed materials in the...

journal article 2019

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Frost Damage Progression Studied Through X-Ray tomography In Mortar With Phase Change Materials

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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On The Role Of Soft Inclusions On The Fracture Behaviour Of Cement Paste

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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An approach to develop printable strain hardening cementitious composites

Chaves Figueiredo, S. (author), Romero Rodriguez, C. (author), Ahmed, Zeeshan Y. (author), Bos, D. H. (author), Xu, Y. (author), Salet, Theo M. (author), Copuroglu, Oguzhan (author), Schlangen, E. (author), Bos, Freek P. (author)

New additive manufacturing methods for cementitious materials hold a high potential to increase automation in the construction industry. However, these methods require new materials to be developed that meet performance requirements related to specific characteristics of the manufacturing process. The appropriate characterization methods of...

journal article 2019

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Effect of viscosity modifier admixture on Portland cement paste hydration and microstructure

Chaves Figueiredo, S. (author), Copuroglu, Oguzhan (author), Schlangen, E. (author)

Significant attention has been given to the development of new materials and techniques to be employed in the construction market. One of the techniques which has drawn noticeable attention is the additive manufacturing process (a.k.a. 3-dimensional printing (3D printing)). One of the approaches of this construction technique is the extrusion of...

journal article 2019

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Numerical investigation of crack self-sealing in cement-based composites with superabsorbent polymers

Romero Rodriguez, C. (author), Chaves Figueiredo, S. (author), Deprez, M. (author), Snoeck, D. (author), Schlangen, E. (author), Šavija, B. (author)

Recently the concept of crack self-sealing has been investigated as a method to prevent degradation and/or loss of functionality of cracked concrete elements. To obtain self-sealing effect in the crack, water swelling admixtures such as superabsorbent polymers (SAP) are added into the cementitious mix. In order to design such self-sealing...

journal article 2019

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The Effect of Viscosity-Modifying Admixture on the Extrudability of Limestone and Calcined Clay-Based Cementitious Material for Extrusion-Based 3D Concrete Printing

Chen, Y. (author), Chaves Figueiredo, S. (author), Yalçinkaya, Ç. (author), Copuroglu, Oguzhan (author), Veer, F.A. (author), Schlangen, E. (author)

To investigate the effects of viscosity-modifying admixture (VMA) on the extrudability of limestone and calcined clay-based cementitious materials, three mix designs with different dosages of VMA were proposed in this study. The ram extrusion was utilized as an extrusion model for exploring the fresh properties of printable materials. Two...

journal article 2019

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Limestone and Calcined Clay-Based Sustainable Cementitious Materials for 3D Concrete Printing: A Fundamental Study of Extrudability and Early-Age Strength Development

Chen, Y. (author), Li, Z. (author), Chaves Figueiredo, S. (author), Copuroglu, Oguzhan (author), Veer, F.A. (author), Schlangen, E. (author)

The goal of this study is to investigate the effects of different grades of calcined clay on the extrudability and early-age strength development under ambient conditions. Four mix designs were proposed. Three of them contained high, medium, and low grades of calcined clay, respectively, and one was the reference without calcined clay. In terms...

journal article 2019

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Modeling water absorption in cement-based composites with SAP additions

Romero Rodriguez, C. (author), Chaves Figueiredo, S. (author), Schlangen, E. (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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Modelling strategies for the study of crack self-sealing in mortar with superabsorbent polymers

Romero Rodriguez, C. (author), Chaves Figueiredo, S. (author), Snoeck, Didier (author), Šavija, B. (author), Schlangen, E. (author)

In this work, a numerical model is presented to predict the self-sealing effect provided by superabsorbent polymers (SAP) admixtures in mortar. Firstly, the use of a law of absorption kinetics for SAP embedded in a cementitious matrix was validated with experimental results available in literature. Secondly, two extreme strategies are considered...

conference paper 2018

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Durability of fibre reinforced cementitious composites: Coupling mechanical and chloride environment loads

Mafalda Matos, Ana (author), Chaves Figueiredo, S. (author), Nunes, Sandra (author), Schlangen, E. (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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Piezoresistive properties of cementitious composites reinforced by PVA fibres

Chaves Figueiredo, S. (author), Copuroglu, Oguzhan (author), Šavija, B. (author), Schlangen, E. (author)

The use of fibres to enhance the ductility of cementitious composites has been extensively studied for the past few years. The addition of polymeric or metalic fibres with random orientation to the composite or even natural long and aligned fibres demonstrated a very successful reinforcement capable to reach a high mechanical performance....

conference paper 2018

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Development of ductile cementitious composites incorporating microencapsulated phase change materials

Šavija, B. (author), Lukovic, M. (author), Kotteman, Geerte (author), Chaves Figueiredo, S. (author), França de Mendonça Filho, F. (author), Schlangen, E. (author)

Abstract In the past two decades, much research has been devoted to overcoming the inherent brittleness of cementitious materials. To that end, several solutions have been proposed, mainly utilizing fibres. One of the most promising classes of materials is strain hardening cementitious composite (SHCC). It utilizes PVA fibres, and it is...

journal article 2017

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Induction healing of concrete reinforced by bitumen-coated steel fibres

Romero Rodriguez, C. (author), Chaves Figueiredo, S. (author), Chiaia, B. (author), Schlangen, E. (author)

Cracking in concrete structures compromises the durability and functionality of the structures themselves. Different kinds of self-healing concretes, less or more sophisticated, have been developed in the past ten years to overcome early cracks in structures. An experimental study of a novel self-healing concrete is presented. Bitumen, used as...

conference paper 2016