Historic building information modeling (HBIM) represents an emerging field that extends traditional building information modeling (BIM) to the preservation, management, and analysis of heritage structures. This paper provides a comprehensive overview of HBIM, tracing its evolution from its origins and early applications to its current state and future prospects. The processes of data collection and modeling are thoroughly examined, addressing levels of detail, digitization methods, and commonly used software and data formats. Attention is also given to existing BIM standards and protocols and their potential application to HBIM. The paper emphasizes the importance of appropriate data selection and management, both for geometrical and non-geometrical (historical and architectural) information. Furthermore, it explores the integration of HBIM with structural analysis tools, a subject of growing interest, particularly in light of its potential for integration with structural health monitoring systems and advanced computational models. The results of this review highlight the increasing role of HBIM in heritage preventive preservation and management, a topic that accounted for 40% of the articles on this subject in 2023. These findings demonstrate that HBIM offers significant potential for managing and preserving heritage buildings, but to fully realize its capabilities, advancements in data interoperability, standardized protocols, and real-time structural analysis are essential to make it a widely effective tool in conservation efforts.

Rammed earth has long been recognised for its economic, environmental, and social advantages, and it is increasingly considered a sustainable alternative within the construction industry. Its primary benefit lies in the use of local soils, thereby minimising environmental impacts associated with material transport. At present, the assessment of soil suitability relies primarily on particle size distribution (PSD) envelopes or the maximum dry density achieved in compaction tests. Although the mechanical performance of unstabilised rammed earth (URE)—most notably its unconfined compressive strength (UCS)—depends heavily on soil clay content due to clay’s role as a natural binder, clay-rich soils are often excluded by existing criteria, despite reports of acceptable strength in such materials. In this study, URE specimens were prepared from a single local soil by systematically varying its clay fraction. The optimum moisture content (OMC) of all mixtures was determined, and all specimens were cured under controlled conditions for 28 days before being subjected to UCS testing. One-way ANOVA confirmed a statistically significant influence of clay content on UCS, and a logarithmic regression model was developed and benchmarked against published data. The results indicate that, under the controlled material and curing conditions investigated, the clay fraction can serve as a practical first-order indicator of compressive strength and related physical parameters in URE, although its predictive capacity must be interpreted together with mineralogy, moisture state, compaction conditions, and soil fabric.