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The integration of daylighting element into sustainable building design presents a significant opportunity to reduce energy consumption while improving indoor environmental quality. This study focuses on the performance assessment of passive daylight transport systems, with an emphasis on their thermal and optical characteristics. Various configurations of tubular daylighting devices were analyzed using simulation-based methods, considering material properties, geometrical parameters, and hygrothermal conditions o...

3D concrete printing is an innovative approach to construction that enables faster, flexible and material-efficient building construction. A key factor for the broader adoption of this technology is understanding the mechanical properties of printed concrete constructions and validating them through experimental and numerical studies. This paper focuses on the determination of the mechanical properties of digital concrete with emphasis on the effect of production technology, testing and analysis of failure mechani...

External Thermal Insulation Composite Systems (ETICS) are a key component in achieving high energy performance in building envelopes. Despite their thermal efficiency, ETICS facades are frequently affected by biological surface degradation caused by microbial growth, primarily algae and fungi. This phenomenon is closely linked to hygrothermal dynamics, where moisture availability, condensation events, and limited surface drying play a critical role. The presented study maps the conditions contributing to biologica...

Blue-green infrastructure (BGI) is part of European policies to address climate change that has occurred in recent years. In Sandanski region, Bulgaria, data from the European Centre for Medium-Range Weather Forecasts (ERA5) show that since 1979, air temperatures have risen by 2.3 degrees Celsius, with an upward trend. Meanwhile, there is no permanent decrease in precipitation, but there are extreme events and alternating cycles of floods and droughts. BGI can mitigate climate change by cooling the effect of veget...

The most widely used building materials in the world are those based on Portland cement. Unfortunately, their use is associated with a number of negative environmental impacts, from CO2 emissions to the depletion of natural aggregate resources. In order to contribute to greater environmental responsibility, this work investigated building materials containing both alternative binders and fillers. Magnesium oxychloride cement (MOC) is considered to be a more sustainable binder than Portland cement and is characteri...

The accumulation of glass waste has become a significant environmental concern worldwide, with millions of tons of glass discarded annually. Although glass is 100% recyclable, a substantial proportion still ends up in landfills due to inefficient collection systems, high processing costs, or limited market demand for recycled glass. In recent years, researchers and environmental policymakers have intensified efforts to identify alternative applications for this inert but non-biodegradable material, particularly in...

The paper is devoted to the study of the combustion process in fibrous organic materials based on natural fibers. The paper presents the results of research focused on the study of the relationship between the microstructure of organic fibrous insulation materials, fiber properties and their resulting reaction to fire. This is a comprehensive approach to describing the reaction to fire beyond the scope of classification according to EN 13501-1. The basic test methods used to determine the reaction to fire are used...

The development of cements that produce less CO2 is important for the preservation of our environment. One way to reduce greenhouse gas emissions is to produce belite cements that contain a higher proportion of belite than alite. Although the long-term strengths of this type of cement are comparable or even higher than those of ordinary Portland cement, their disadvantage is insufficient initial strengths) due to the slow hydration of belite. In this work, the effect of adding SO3 to the raw meal on the initial st...

The protection and maintenance of cultural heritage is an integral aspect of urban development. Preserving the original architecture, appearance, and material design of historic buildings is of a significant importance for understanding the development of society and the changes that have occurred throughout history. In the face of increasing demands for durability, mechanical strength, water vapor permeability, and compatibility with other parts of historical construction, research has focused on innovations in l...

Historical building structures are vital in illuminating human history. Ensuring their preservation and passing them down to future generations is of great importance. The preservation and restoration of historical buildings constitute a complex and highly relevant issue, wherein the criteria for compatibility in the selection and development of appropriate materials and application technologies are of significant importance. In historical context, the enhancement of lime mortar properties was achieved through the...

Human activities on a global scale are increasingly generating substantial quantities of solid waste. Consequently, in recent years, there has been a significant worldwide initiative to reduce waste production and reuse existing waste, including non-recyclable plastics, industrial waste, sewage sludge, hazardous waste, municipal waste, among others. To ensure environmental quality, further treatment of waste is essential to prevent its accumulation in landfills. For waste materials that cannot be recycled or for w...

Non-destructive testing (NDT) of 3D-printed concrete is challenging due to complex geometries and layer-dependent material heterogeneity. Photogrammetry captures surface geometry, but its outputs cannot be directly linked to NDT values. This study presents a workflow that integrates photogrammetric models with rebound hammer measurements and applies radial basis function (RBF) interpolation to visualize near-surface strength. Each measurement point is matched to its 3D coordinates on the mesh, enabling consistent ...