Comparison of Porosity and Thermal Conductivity of Concrete and Alkali-Activated Hybrid Binders in 3D-Printed Fiber-Reinforced Foamed Composites
Magdalena Rudziewicz, Marcin Maroszek, Marek Hebda
TL;DR
This paper compares the performance of concrete and alkali-activated binders in 3D-printed composites, focusing on porosity, thermal conductivity, and mechanical strength.
Contribution
The study introduces a comparative analysis of matrix types and fiber systems in 3D-printed fiber-reinforced foamed composites.
Findings
Alkali-activated specimens showed superior compressive, flexural, and shear strength.
Cementitious composites exhibited greater dimensional stability and easier process control.
Alkali activation improves fiber–matrix bonding and pore structure homogeneity.
Abstract
Fiber-reinforced foamed composites have recently attracted growing interest due to their potential in sustainable construction and advanced additive manufacturing. However, their performance strongly depends on the type of matrix and fiber system used. The aim of this study was to perform a comparative analysis of matrix type and fiber composition on the porosity, thermal behavior, and mechanical performance of 3D-printed fiber-reinforced foamed composites. To this end, cementitious mixtures (M1–M3) were compared with alkali-activated hybrid binder systems (M4–M6). The results revealed marked differences in mechanical strength, dimensional stability, moisture transport, and interlayer cohesion. Alkali-activated specimens, particularly M5 and M6, exhibited superior compressive, flexural, and shear strength; reduced water penetration; and improved fiber–matrix bonding, associated with a…
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Taxonomy
TopicsInnovations in Concrete and Construction Materials · Innovative concrete reinforcement materials · Concrete and Cement Materials Research