Inovação em concreto na era digital: uma análise das características de materiais cimentícios para manufatura aditiva

Abstract

In the context of the burgeoning digital revolution within the construction industry, additive manufacturing with cementitious materials (3DCP) stands out as a promising and innovative alternative. However, the cementitious mixtures integral to this technology must meet intricate and demanding specifications. Consequently, recent research has been diligently directed toward scrutinizing the material's behavior in its fresh state during the 3DCP process, with a focus on understanding the impact of its constituent materials. This study aims to conduct a systematic analysis of the existing literature regarding the characteristics of cementitious mixtures intended for additive manufacturing, particularly emphasizing the extrusion technique. Following the establishment of a protocol and rigorous search criteria, 35 articles were meticulously selected from the reputable electronic bibliographic databases Scopus and Web of Science. Subsequently, employing the StArt tool, a judicious filtration process identified 12 studies that were inherently aligned with the primary objectives of this research, warranting an in-depth examination. In addition to this systematic review (SR), a supplementary endeavor involved mapping studies within the proceedings of the three editions of the International RILEM Conference on Concrete and Digital Manufacturing - Digital Concrete. Notably, the temporal progression of research in the 3DCP domain reveals not only an exponential growth but also an evolution in the breadth and intricacy of investigations. Moreover, the development of cementitious materials for this technology transcends the confines of academic research, as the construction market strategically invests in and expands its product portfolio. Furthermore, a significant portion of contemporary studies seeks alternatives that partially substitute the substantial volume of Portland cement (CP) in mixtures, often incorporating different types of waste. These alternatives aspire to meet stringent parameters necessary for additive manufacturing with cementitious materials, thereby positioning the technology as a competitive force in comparison to conventional market offerings.