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Plasters with mixed-in crystallization inhibitors: Results of a 4-year monitoring of on-site application

Lubelli, B. (author), des Bouvrie, Ernst (author), Nijland, Timo G. (author), Kamat, Ameya (author)

Salt crystallization is a major cause of weathering of mortars, including plasters and renders. In the last decade, the use of mixed-in salt crystallization inhibitors in mortars has been proposed as a solution to improve the durability of this material with respect to salt decay. Laboratory characterization and accelerated weathering tests have...

journal article 2023

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Assessment of shrinkage and bond behaviour of high performance cement-based composites as a repair mortar

Baloch, Hassan (author), Grunewald, S. (author), Matthys, Stijn (author)

There is a need to develop innovative repair materials which can overcome the challenges of cement-based repair mortars being relatively prone to shrinkage effects. In practice, free shrinkage of repair mortar is often considered as an indicator for potential cracking and delamination of applied repair mortars due to restrained shrinkage...

journal article 2023

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The effect of furnace steel slag powder on the performance of cementitious mortar at ambient temperature and after exposure to elevated temperatures

Miah, Md Jihad (author), Ali, Md Kawsar (author), Lo Monte, Francesco (author), Chandra Paul, Suvash (author), Babafemi, Adewumi John (author), Šavija, B. (author)

Induction furnace steel slag is a secondary product obtained when molten steel is separated from the impurities in the steel-producing furnaces. Though numerous studies have been published on the mechanical strength of concrete/mortar made with steel slag as fine aggregate, relatively few studies focus on the shrinkage, durability (i.e.,...

journal article 2021

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Influence of sand drying and mixing sequence on the performance of mortars with fine recycled concrete aggregates

Nedeljković, Marija (author), Mylonas, Akis (author), Wiktor, Virginie (author), Schlangen, E. (author), Visser, Jeanette (author)

Fine recycled concrete aggregates (fRCA, 0–4 mm) are produced from demolished concrete structures and consist of natural aggregates and old cement mortar. The presence of old cement mortar has detrimental effect on the fresh properties and strength of new concrete. This study aims to investigate the working mechanism and effectiveness of...

journal article 2021

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Corrosion Behavior of Reinforcing Steel Undergoing Stray Current and Anodic Polarization

Chen, Zhipei (author), Koleva, D.A. (author)

Different concrete structures (viaducts, bridges, or tunnels) in the neighborhoods of railways may be subject to the stray current leaking from the rails. In these cases, the reinforcing rebars embedded in concrete act as conductors, “pick up” the stray current, and can corrode. For simulating the stray current-induced corrosion of metals, most...

journal article 2021

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Restraining effect of aggregates on autogenous shrinkage in cement mortar and concrete

Lu, T. (author), Li, Z. (author), Huang, H. (author)

Shrinkage-induced cracking can impair the durability of concrete structures. In the past few decades, this topic has drawn more and more attention. Shrinkage of mortar and concrete is actually the result of the interaction between the shrinking cement paste and the non-shrinking aggregates. In recent years, different models that consider the...

journal article 2021

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Influence of brick and mortar properties on bioreceptivity of masonry: Results from experimental research

Lubelli, B. (author), Moerman, J. (author), Esposito, R. (author), Mulder, K.B. (author)

The effect of mortar and brick properties on the growth of ivy-leaved toadflax (Cymbalaria muralis) and yellow corydalis (Pseudofumaria lutea) has been investigated in laboratory. Different mortar compositions were designed and tested in combination with two different bricks. Highly porous bricks and mortars showed good bioreceptivity;...

journal article 2021

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X-Ray Micro Tomography of Water Absorption by Superabsorbent Polymers in Mortar

Romero Rodriguez, C. (author), Deprez, Maxim (author), França de Mendonça Filho, F. (author), van Offenwert, Stefanie (author), Cnudde, Veerle (author), Schlangen, E. (author), Šavija, B. (author)

Superabsorbent Polymers (SAP) have been recently subject of investigation as smart admixtures for cement-based materials. The properties of these polymers enable their use for internal curing, increasing freeze/thaw resistance, boosting autogenous self-healing and providing a crack self-sealing effect in cementitious composites. Except for...

book chapter 2020

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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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Experimentally validated meso-scale fracture modelling of mortar using output from micromechanical models

Zhang, H. (author), Xu, Y. (author), Gan, Y. (author), Schlangen, E. (author), Šavija, B. (author)

This paper presents a validation process of the developed multi-scale modelling scheme on mortar composites. Special attention was paid to make the material structure of real and virtual mortar specimens comparable at the meso-scale. The input mechanical parameters of cement paste (both bulk cement paste and interfacial transition zone) at the...

journal article 2020

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Effect of Recycled Iron Powder as Fine Aggregate on the Mechanical, Durability, and High Temperature Behavior of Mortars

Ali, Md Kawsar (author), Miah, Md Jihad (author), Paul, Suvash Chandra (author), Babafemi, Adewumi John (author), Kong, Sih Ying (author), Šavija, B. (author)

This study evaluates the mechanical, durability, and residual compressive strength (after being exposed to 20, 120, 250, 400 and 600 °C) of mortar that uses recycled iron powder (RIP) as a fine aggregate. Within this context, mechanical strength, shrinkage, durability, and residual strength tests were performed on mortar made with seven...

journal article 2020

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Experimentally validated multi-scale fracture modelling scheme of cementitious materials

Zhang, H. (author)

Cementitious materials are heterogeneous on mutliple length scales, from nanometres to metres. Consequently, their macroscopic mechanical properties are affected by material structures at all length scales. In pursuit of fundamental understanding the relationship between their multiscale heterogeneous material structure and mechanical properties...

doctoral thesis 2019

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Recommendation of RILEM TC 243-SGM: Functional requirements for surface repair mortars for historic buildings

Válek, Jan (author), Hughes, John J. (author), Pique, Francesca (author), Gulotta, Davide (author), van Hees, R.P.J. (author), Papayiani, Ioanna (author)

Surface repair mortars are used for the compensation, or repair, of lost portions of surface materials in historic masonry buildings. It is recommended that their design and application should be performed in a wider context of conservation values related decision making, to prioritise preservation of original fabric, authenticity of approach...

journal article 2019

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Bio-Based self-healing mortar

Md Yunus, Balqis (author), Schlangen, E. (author), Jonkers, H.M. (author)

This paper investigates the effects of alkaliphilic spore-forming bacteria of the genus Bacillus on the compressive strength of the mortar cube and the healing capacity of the bacteria as healing agent on mortar containing crack. The experiments were carried out using cube test, stereomicroscopy and environmental scanning electron microscopy ...

journal article 2019

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Thermal response of mortar panels with different forms of macro-encapsulated phase change materials: A finite element study

Kong, Sih Ying (author), Yang, Xu (author), Paul, Suvash Chandra (author), Wong, Leong Sing (author), Šavija, B. (author)

This paper presents a numerical investigation of thermal response of mortar panels, incorporating macro-encapsulated paraffin in different forms. Two types of macro capsules were fabricated and tested in this study using an instrumented hot plate device. The experimental results show that macro encapsulated paraffin reduced the temperature and...

journal article 2019

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Influence of moisture condition on chloride diffusion in partially saturated ordinary Portland cement mortar

Zhang, Y. (author), Zhang, M. (author), Ye, G. (author)

Experiments have been carried out to study the influence of moisture condition, including moisture content and its distribution, on the chloride diffusion in partially saturated ordinary Portland cement mortar. The mortar samples with water-to-cement (w/c) ratios of 0.4, 0.5 and 0.6, cured for 1 year, were preconditioned to uniform water...

journal article 2018

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Ballistic model for the prediction of penetration depth and residual velocity in adobe: A new interpretation of the ballistic resistance of earthen masonry

li Piani, T. (author), Weerheijm, J. (author), Sluys, Lambertus J. (author)

In this paper, a new one-dimensional phenomenological model is developed for the assessment of the ballistic performance of Adobe. Adobe is a masonry largely spread in areas of the world involved in military operations. Addressing fundamental ballistic parameters such as residual velocity or penetration depth for this building technology is...

journal article 2018

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Nanostructured lime-based materials for the conservation of calcareous substrates

Borsoi, G. (author)

Nanolimes, i.e. dispersions of lime (Ca(OH)2)nanoparticles in alcohol, have been extensively investigated over the last two decades as consolidation products for calcareous substrates.<br/>The use of nanolimes for consolidation of mural paintings arises from the lack of e ective and compatible consolidants for this type of substrates; the use of...

doctoral thesis 2017

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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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Experimental study of chloride diffusivity in unsaturated ordinary Portland cement mortar

Zhang, Y. (author), Ye, G. (author)

Experiments are carried out to investigate the chloride diffusivity in partially saturated ordinary Portland cement mortars with water-to-cement (w/c) ratios of 0.4, 0.5 and 0.6. Based on resistivity measurement and Nernst-Einstein equation, the chloride diffusivities of cement mortars at various water saturations are estimated. The pore...

conference paper 2017