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Publications (24)
Photocatalytic coatings incorporating nano-TiO₂ have emerged as effective solutions for air purification, utilizing solar radiation to degrade airborne pollutants. However, the long-term stability of such coatings, particularly those based on organic binders, remains a concern due to their susceptibility to photocatalytic-driven degradation. This s...
This study investigates the relationship between surface properties and microstructural characteristics of photocatalytic composites and their impact on air purification efficiency. High-resolution energy-dispersive X-ray spectroscopy (EDS) mapping and mercury intrusion porosimetry (MIP) were employed to analyze photocatalyst distribution and pore...
This study investigated the influence of the composition of photocatalytic dispersions made with second-generation nano-TiO2 on the air purification performance of photocatalytic cementitious composites. Nine mortar series were prepared, incorporating photocatalytic dispersions of variable content of nano-TiO2, dispersing agent (superplasticizer),...
This study explores the development and performance of photocatalytic cementitious composites modified with nano-TiO2 to address urban air quality and sustainability challenges. Nine mortar series were prepared, incorporating binders with varying carbon footprints and mass contents across different series. The interplay between the fundamental (abr...
This research investigated the properties of photocatalytic cementitious composites, including their air-purification efficiency. A method of characterizing the removal of airborne pollutants (nitrogen oxides), simulating the actual NOx concentration and irradiation conditions in Warsaw, Poland, in the autumn/winter season, was established. The stu...
This study investigated how the surface characteristics of photocatalytic cementitious composites influenced the effectiveness of air purification from nitrogen oxides (NOx), with a particular focus on the impact of coarse aggregate exposure on the photoactive surface. Air purification efficiency tests were conducted using a custom-developed proced...
This research investigated the properties of modified cementitious composites including water purification from heavy metal-zinc. A new method for characterizing the immobilization properties of tested modifiers was established. Several additions had their properties investigated: biochar (BC), active carbon (AC), nanoparticulate silica (NS), coppe...
The risk of the releasing of nanometric particles from construction materials with nanometric components might be one of the biggest threats to further development of them. One of the possible ingress routes to human organisms is the respiratory system. Therefore, it is crucial to determine the risk of emission of nanometric particles during materi...
Superabsorbent polymers (SAP) allow for the introduction of changes to the pore network characteristics in cementitious composites and the course of binder hydration. Therefore, SAP addition contributes to significant changes in multiple properties of concrete. The effect of internal curing differs depending on its design process, the initial conte...
Beton wodoprzepuszczalny jest coraz częściej wykorzystywany jako materiał do konstrukcji nawierzchni dróg o niskim natężeniu ruchu oraz prefabrykowanych elementów betonowych (np. płyt chodnikowych) ze względu na unikalną zdolność do filtracji wody, przyczyniającą się do poprawy lokalnych warunków retencji. Autorzy zdecydowali się ocenić przydatność...
W artykule poddano analizie wpływ zastąpienia części cementu wypełniaczami mineralnymi - mączką kwarcową i chalcedonitową - na skuteczność oczyszczania powietrza z tlenków azotu przez zaprawy o właściwościach fotokatalitycznych. Badania przeprowadzono według autorskiej metodyki, odwzorowującej rzeczywiste warunki oświetlenia oraz stężenia zanieczys...
Beton wodoprzepuszczalny stanowi innowacyjne rozwiązanie materiałowe mogące służyć poprawie lokalnej retencji w aglomeracjach miejskich. Biorąc pod uwagę możliwe zanieczyszczenie spływów powierzchniowych, w ramach przeprowadzonych badań sprawdzono, czy beton wodoprzepuszczalny charakteryzuje się zdolnością do filtracji przygotowanych roztworów z za...
Due to its properties, pervious concrete is usually considered a material of choice for permeable surfaces. However, its permeability properties, as well as mechanical performance, depend on its effective porosity. In this paper, the Authors investigated the influence of material and technological factors on the selected properties of pervious conc...
This study focuses on developing new surface modification methods for photocatalytic cementitious composites. The question that was investigated was if superabsorbent polymers can act as an intermediate environment, intensifying the incorporation of TiO2 particles on the surface of the tested material. Four variants of surface modification were des...
This work aimed to investigate the influence of selected material variables on the self-cleaning and air purification efficiency in NOx pollutants of cement-based photocatalytic composites. Tests were performed on cement mortars, with seven independent variables considered: the mass ratio between cement and quartz powder to sand, the water to cemen...
Modyfikacja betonu polimerem superabsorpcyjnym (SAP), który po nasyceniu wodą zarobową stanowi środek pielęgnacji wewnętrznej jest stosunkowo nowym rozwiązaniem w technologii betonu. Wprowadzenie tego typu polimeru do składu betonu przyczynia się do modyfikacji mikrostruktury matrycy cementowej (formacja dodatkowych quasi-porów), a co za tym idzie...
NASA has revealed that they plan to resume manned missions and ensure the permanent presence of people in the so-called habitats on the Moon by 2024. Moon habitats are expected to be built using local resources-it is planned to use lunar regolith as aggregate in lunar concrete. Lunar concrete design requires a new approach in terms of both the prod...
This paper examines the influence of polyacrylic superabsorbent polymers (SAP) on the properties concerning chloride diffusion in cementitious materials. The conducted study investigated the influence of SAP on chloride diffusion in concretes of the initial w/c = 0.4 (for which the changes in compressive strength due to the SAP presence were neglig...
The effectiveness of internal curing of cement composites with the use of SAP depends, among others, on its chemical composition and its granulation. However, the interaction between hydrogel and other components of the concrete hasn’t been fully investigated. The aim of the presented research was to investigate the impact of cement/aggregate parti...
Modyfikacja składu betonu polimerem superabsorpcyjnym (w postaci granulek absorbujących znaczną ilość wody zarobowej), stanowi metodę pielęgnacji wewnętrznej, prowadzącą do znacznej redukcji skurczu betonu. Wpływ takiej modyfikacji na inne właściwości betonu jest przedmiotem wielu badań prezentowanych w najnowszej literaturze światowej, natomiast n...
Superabsorbent polymers (SAP) are compounds that are able to absorb water increasing their mass and volume, resulting in mass exceeding the staring value by hundreds times or more. Their absorption capacity depends on the water absorption environment-the higher alkali content, the worse is the capacity. In terms of concrete technology, the laborato...
Jedną z niedawno wprowadzonych grup dodatków do betonu są polimery superabsorpcyjne (SAP). Ich zastosowanie, jako środka wewnętrznej pielęgnacji wodnej betonu, pozwala na znaczną redukcję zmian liniowych spowodowanych zjawiskami skurczowymi, poprawiając w ten sposób trwałość materiału. Wpływ SAP na parametry mechaniczne, takie jak wytrzymałość na ś...
This paper examines the influence of dosing method and material characteristic of superabsorbent polymers (SAP) used for internal curing, on the selected concrete properties. A new method of introducing SAP into the concrete mix and its impact on the shrinkage and compressive strength of concrete was studied. It was shown that the method of dosing...
