Mateusz Wyrzykowski


Last Name

Wyrzykowski

First Name

Mateusz

ORCID

0000-0003-1995-6638

Organisational unit

01109 - Lehre Bau, Umwelt und Geomatik

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2013 - 2019102020 - 202513
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Publications1 - 10 of 23
  • On the mechanism of plastic shrinkage cracking in fresh cementitious materials
    Item type: Journal Article
    Ghourchian, Sadegh; Wyrzykowski, Mateusz; Plamondon, Mathieu; et al. (2019)
    Cement and Concrete Research
  • Visco-elastic behavior of blended cement pastes at early ages
    Item type: Journal Article
    Hu, Zhangli; Hilaire, Adrien; Wyrzykowski, Mateusz; et al. (2020)
    Cement and Concrete Composites
  • Plastic shrinkage of concrete made with calcined clay-limestone cement
    Item type: Journal Article
    Wyrzykowski, Mateusz; Di Bella, Carmelo; Sirtoli, Davide; et al. (2025)
    Cement and Concrete Research
    Concrete made with blended cements with high clinker replacement ratios may be at higher risk of plastic shrinkage cracking when experiencing high evaporation rates immediately after casting. This paper investigates the plastic shrinkage behavior of concretes made with a cement with clinker replacement by a blend of calcined clay and limestone, which was compared to a conventional Portland cement and a Portland-limestone cement. In order to assess the risk of cracking, we studied early deformations and accompanying processes in concretes exposed to fast evaporation in a wind tunnel. As could be expected from previous studies, concretes made with both blended cements experienced higher shrinkage and cracking compared to ordinary Portland cement, mainly due to their slower hydration caused by a lower clinker amount and higher dosage of superplasticizer. However, the extent of plastic shrinkage cracking was similar with calcined-clay limestone cement and Portland-limestone cement.
  • 3D Printable Ca(OH)₂‑based geopolymer concrete with steel fber reinforcement
    Item type: Journal Article
    Mortada, Youssef; Hammoud, Ahmad; Masoud, Laith; et al. (2025)
    Materials and Structures
    This study investigates the impact of varying steel fiber (SF) content (0%, 0.8%, 1.0%, and 1.2% by volume) on the mechanical and durability properties of 3D-printed Ca(OH)2-activated geopolymer concrete (GPC). The addition of 1.2% SF improved flexural strength by 69% at 7 days and 16% at 28 days, while tensile strength more than doubled to 3.75 MPa at 28 days. Although compressive strength remained unaffected at 43 MPa, SF enhanced interlayer bond strength by 20%, which is crucial for layer cohesion in 3D-printed structures. Additionally, the elastic modulus increased by 7%, contributing to improved stiffness. Durability assessments, including autogenous shrinkage and self-induced stress, indicated a slight reduction in shrinkage of SF-reinforced samples, with no significant effect on self-induced stress. Microstructural analysis using scanning electron microscopy (SEM) and X-ray micro-computed tomography (mu CT) demonstrated the crack-bridging behavior of steel fibers, enhancing ductility and fracture resistance. There was a slight increase in porosity (5.34%) of SF-reinforced samples without negatively affecting their mechanical properties. Notably, SF improved early-age toughness and controlled crack propagation across printed layers, addressing a critical challenge in 3D-printed concrete. The novelty of this work lies in successfully reinforcing 3D-printed Ca(OH)2-activated GPC with recycled steel fibers, enhancing mechanical properties, interlayer bonding, and durability without compromising printability. This study offers a sustainable reinforcement strategy for 3D printing in construction.
  • Low-carbon MgO/hydromagnesite binders – effect of moisture state on the evolution of mechanical properties
    Item type: Journal Article
    Zhu, Ye; German, Alexander; Wyrzykowski, Mateusz; et al. (2025)
    Cement and Concrete Research
    We studied the mechanical properties of MgO/hydromagnesite mortars cured at 20 °C both in humid (98 %RH) and dry (57 %RH) environments. The linear storage Young's modulus was determined with quasi-static loading and dynamically by SIngle MOde Resonance Ultrasound Spectroscopy (SIMORUS) measurements. We measured the corresponding loss modulus and the nonlinear counterpart of the storage modulus. Humid environment adversely affected the evolution of the elastic properties, i.e. it caused a reduction of the linear storage Young's modulus and an increase of its nonlinear counterpart, the latter being a proxy of microstructural heterogeneity and potential damage. On the other hand, mortars cured at 57 %RH experienced a monotonous growth of the linear storage Young's modulus and decrease of the loss modulus. Similar trends were observed for compressive strength. We postulate that the lowering of mechanical properties upon moisture uptake is due to the intrinsic effect of adsorbed water on the microstructure.
  • Internal curing with superabsorbent polymers of different chemical structures
    Item type: Journal Article
    Zhong, Peihua; Wyrzykowski, Mateusz; Toropovs, Nikolajs; et al. (2019)
    Cement and Concrete Research
  • Microstructure development and autogenous shrinkage of mortars with C-S-H seeding and internal curing
    Item type: Journal Article
    Wyrzykowski, Mateusz; Assmann, Alexander; Hesse, Christoph; et al. (2020)
    Cement and Concrete Research
  • Exploring the carbon sequestration of an asphalt base course mixture containing novel cold-bonded biochar-rich lightweight aggregates
    Item type: Journal Article
    Grossegger, Daniel; Wyrzykowski, Mateusz; Toropovs, Nikolajs; et al. (2025)
    Materials and Structures
    An emerging strategy to compensate for the greenhouse gas emissions of products is to incorporate carbonaceous materials obtained from removed atmospheric carbon dioxide, mainly obtained through biomass conversion. This approach can turn asphalt pavements into a functional carbon sink. In particular, biochar has been used as a bitumen modifier. However, due to performance limitations, carbonaceous materials were only added in small quantities to asphalt mixtures. An alternative approach is to produce lightweight aggregates to substitute a part of the mineral aggregates of the asphalt mixture. To this end, biochar is pelletised with a hydraulic binder and water in a cold-bonding process, forming spherical pellets labelled as carbon-rich lightweight aggregates (C-LWA). Like other lightweight aggregates, C-LWA showed a reduced mechanical strength compared to conventional mineral aggregates, adversely affecting the asphalt mixture performance. Cracking and rutting resistance almost linearly decreased with C-LWA content. The direct addition of biochar had a similar adverse influence on the mixture performance. Despite a reduced performance, adding biochar and C-LWA reduces the greenhouse gas emissions of asphalt mixtures. Net-zero emissions were estimated for the produced asphalt mixture by adding 5.5 ± 0.4% C-LWA or 3.0 ± 0.2% biochar obtained from the pyrolysis of landscape management wood. A wider range of C-LWA addition (1% to 35.1%) was estimated considering the greenhouse gas emission estimation variability of both asphalt and biochar production.
  • Prediction of autogenous shrinkage of cement pastes as poro-visco-elastic deformation
    Item type: Journal Article
    Hu, Zhangli; Wyrzykowski, Mateusz; Scrivener, Karen; et al. (2019)
    Cement and Concrete Research
  • Water Redistribution-Microdiffusion in Cement Paste under Mechanical Loading Evidenced by 1H NMR
    Item type: Journal Article
    Wyrzykowski, Mateusz; Gajewicz-Jaromin, Agata M.; McDonald, Peter J.; et al. (2019)
    The Journal of Physical Chemistry C
    The mobility of water within the microstructure of hardened cement paste has been at the center of a long-lasting debate, motivated by the need to understand the fundamental mechanisms that play a role in drying, shrinkage, creep, and thermal expansion. Our 1H NMR results show for the first time that externally applied pressure can lead to migration of water within the microstructure (microdiffusion). Upon compression, the gel water signal decreases. For the most part, this is accommodated by a corresponding increase in the signal of water in larger, interhydrate, and capillary spaces. However, there is also an increase in the signal corresponding to the water in most confined spaces. Normally, such tiny spaces are classified as hydrate interlayers. However, we do not conclude that there is a significant increase in interlayer water. Rather, we attribute this part of the increase to a rearrangement of the microstructure upon compression with some water confined in increasingly small gel pore spaces. These findings show that the deformability of the microstructure (C–S–H gel) at the expense of gel porosity may explain part of the macroscopic deformations due to short-term creep.
Publications1 - 10 of 23