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content/01.abstract.md

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 The authors have comprehensively compiled a dataset encompassing a wide range of lightweight aggregates from existing literature. These aggregates, derived from industrial waste materials or naturally occurring sources, exhibit spatial variability due to regional differences in availability. Consequently, a diverse array of lightweight aggregates is utilized globally. Figure 2 illustrates the various types of aggregates incorporated in this study. Notably, the dataset reveals that clay-based Lightweight Expanded Clay Aggregate (LECA) predominates, reflecting clay's abundance as a raw material for artificial aggregate production [@doi:10.1016/j.surfin.2020.100705]. Furthermore, polystyrene, a prevalent waste material, emerges as a primary source of artificial lightweight aggregates in the dataset [@doi:10.1016/j.procs.2020.05.145].
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-![
-**Types of lightweight aggregates used by researchers in the article from which data has been obtained.**
-](https://github.com/uiceds/project-team-ads/blob/main/content/images/Picture2.png?raw=true ""){#fig:Fig. 2}
+<img src="https://github.com/uiceds/project-team-ads/blob/main/content/images/Picture2.png?raw=true" alt="**Types of lightweight aggregates used by researchers in the article from which data has been obtained.**" id="fig:Fig. 2" style="width:50%;"/>
 
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 Figure 3 illustrates the statistical distribution of compressive strength, tensile strength, and concrete density. The results show that the mean tensile strength is approximately one-tenth of the mean compressive strength (∼30 MPa), aligning with established conventions (e.g., ACI codes) [@en13055-1-2016]. The average density of 1700 kg/m³ reflects the prevalence of expanded clay aggregate and polystyrene-based concretes since their density lies in this range, validating the dataset's accuracy and reliability for further analysis [@doi:10.1016/j.jclepro.2015.07.001; @sivakumar2015flyash].