Evidence map›Paper›PMID 40263523›Full record

ArticleScientific reports2025

Light brightened aggregates extracted from by-products of kaolin raw material classification processes, used to reduce urban heat islands.

Agata Stempkowska, Tomasz Gawenda, Ewelina Pabiś-Mazgaj, Damian Krawczykowski, Dariusz Foszcz

Abstract read
In one paragraph

Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Agata StempkowskaDepartment of Environmental Engineering, Faculty of Civil Engineering and Resource Management, AGH University of Kraków, Mickiewicza 30 Av., 30-059, Kraków, Poland. stemp@agh.edu.pl.
Tomasz GawendaDepartment of Environmental Engineering, Faculty of Civil Engineering and Resource Management, AGH University of Kraków, Mickiewicza 30 Av., 30-059, Kraków, Poland.
Ewelina Pabiś-MazgajGlass and Building Materials Center, Łukasiewicz Research Network Institute of Ceramics and Building Materials, Cementowa 8 Str., 31-983, Kraków, Poland.
Damian KrawczykowskiDepartment of Environmental Engineering, Faculty of Civil Engineering and Resource Management, AGH University of Kraków, Mickiewicza 30 Av., 30-059, Kraków, Poland.
Dariusz FoszczDepartment of Environmental Engineering, Faculty of Civil Engineering and Resource Management, AGH University of Kraków, Mickiewicza 30 Av., 30-059, Kraków, Poland.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The process of urbanisation is resulting in increasingly dense urban areas. It is documented that cities and urban areas have significantly higher temperatures than the surrounding non-urbanised areas. Such a phenomenon has been well known for many years and is referred to as the urban heat island (UHI). The magnitude of this phenomenon varies according to specific local and geographical characteristics. It depends largely on factors such as vegetation (e.g. woodland, flower meadows) but also on land use and land cover conditions. The thermal properties of the materials used in the built environment, the proportion of evaporative surfaces, natural or artificial shading and the city's air corridors are also significant. Development not only affects urban heat points, but also reduces the natural retention capacity. The amount and intensity of precipitation in heavily built-up areas is increased by which the time of rainwater run-off into the catchment is shortened. Surfaces in the city are generally of low retention and do not provide effective opportunities to respond to locally occurring water deficits and do not reduce the effects of excess water in storm rainfall. Drainage systems, especially in old towns, do not always show the required capacity to receive large amounts of water after intense and heavy rainfall or snowmelt. In addition, the water that runs off is already irretrievably lost. The purpose of the study was to determine the possibility of obtaining aggregates with a grain size of 2-8 mm from clay-sand fractions formed by enrichment of kaolin clays, which were also modified with additives. The results obtained will allow further research into the development of technology concepts for the production of lightweight aggregates used, for example, in cool roofs of buildings. Special attention was paid to the microstructure of the aggregate, since the idea of the study was to obtain a material with adequate porosity on the meso-scale, so detailed microscopic analyses were carried out. Brightened materials were obtained with high absorbability above 30%wt and low apparent density of 1.5 g/cm

Indexed as

Artificial lightweight aggregateGreen roofsMaterials recyclingWater retention capacity

Identifiers

PMID40263523
PMCPMC12015500

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