Estudo comparativo dos custos de lajes treliçadas com lajota cerâmica e EPS no âmbito da região do Vale do Jaguaribe

Abstract

The slab truss system are widely used in construction due to their ease of execution and costeffectiveness in residential and commercial structural design. However, the choice of infill material, such as ceramic tiles or EPS (expanded polystyrene), can have a significant impact on project costs and structural performance. The aim of this study was to analyze the financial viability and structural efficiency of using these two filling materials in slab truss system, considering the context of small-scale construction in the Vale do Jaguaribe. The research consisted of a study of an isolated slab through ArcelorMittal's software, ranging from 2 to 5 m (with a variation of 0.5 m) and accidental loads of 100 kg/m², 200 kg/m² and 300 kg/m², with regional and national budget values. In addition, a study of the slab coupled to the structure was carried out in which structural design were carried out with four generic architectures, varying in span from 2.5 to 4 m (with a variation of 0.5 m), differentiated by the filling material (ceramic tile and EPS) and accidental load (100, 200 and 300 kg/m²). The results of the isolated slab study showed that the trussed slab with ceramic tiles (LTL) has a lower cost per m² than the truss system slab with EPS (LTE). However, EPS showed better structural performance, especially over long spans and under high loads, due to its lower specific weight. In the study of the slab coupled to the structure, it was observed that, for buildings with spans of up to 3.5 m, the ceramic slab is more economically viable, regardless of the accidental load applied. However, for buildings with spans of over 4 m and accidental loads of 300 kg/m², EPS becomes more financially viable, as its lightness actively contributes to the reduction of steel and concrete, as well as improving structural performance, without compromising the safety of the structure.