Brazil is a highlight in the ranking of maize cooking oil production, which after consumption generates a significant amount of waste that the improper disposal of it, which could seriously affect the sewage pipes, groundwater, and soil. This research study the incorporation of 1%, 2%, and 3% of soybean (new and waste) in asphalt binder. The samples were analyzed by FTIR and frequency sweep tests. The results indicate that the optimum oil content is in the range of 1–2%, regardless of being new or residual. In the temperature sweep, it was found that the asphalt binder 55/75-E showed a smaller phase angle in all mixtures compared to the asphalt binder 50/70, thus having a better elastic recovery.

This study examines the performance of mat foundations in 13 blocks of eight-story concrete-walled residential buildings. Topographic monitoring bolts were used to monitor the slab’s construction, which was 0.35 m thick and comprised an area of 225 m². Using the collected data, a retro-analysis of the modulus of elasticity was conducted to obtain the geotechnical parameters for forecasting the settlement using the elasticity theory. A nonlinear approach for construction modeling and soil–structure interactions showed that the earthworks at the start of construction had a significant role in settling. Blocks in landfills settled faster than those in land-cut zones. The partial execution of building levels was found to be critical in terms of angular distortions and stresses in the concrete slab. The partial lifting of the foundation plate was confirmed in blocks with partial building floor execution, demonstrating the importance of assessing the foundation’s behavior at this stage. The modulus of elasticity dropped as construction progressed, with landfill parts being particularly vulnerable. Creep settlements contributed significantly, accounting for about 20% of the total settlements in some blocks. The numerical staged construction model accurately replicated the behaviors observed in the monitoring data, confirming the hypothesis of the partial raising of the foundation during the building process, which resulted in higher angular distortions. Based on the results obtained, the authors strongly recommend that the simultaneous consideration of soil–structure interactions and construction effects be commonly used in foundation designs.

Soil-structure interaction (SSI) evaluates how soil or rock deformability imposes on the structure a different load path in a hypothesis of fixed supports, altering the loads acting on the structural elements and the ground. This paper discusses the results of the SSI effects in two buildings with a reinforced concrete structure and shallow foundations in a rock mass. The settlements were monitored by field instrumentation in five stages of their construction, making it possible to estimate through interpolation curves the settlements values of some points. The numerical modeling and structural analysis of the buildings were obtained for two different cases of soil-structure interaction. The structure was considered having fixed supports (non-displaceable) and displaceable supports (with stiffness spring coefficients K). The results reveals the occurrence of SSI effects, with a load redistribution between the columns that occurred differently for the different construction stages. Structural modeling proved to be quite representative, pointing to higher vertical load values than the average values present in building edge zones, which contradicts the conventional idea that central columns are more loaded than the edge columns. The soil-structure interaction analyses resulted in different behaviors regarding both towers; pointing out that low settlements and building symmetry in plan minimize the effects of interaction, with no tendency of load redistribution between columns as the structure rigidity increases, as construction development.

As agências rodoviárias em regiões tropicais enfrentam desafios significativos ao aplicar sistemas tradicionais de classificação de solos, como o TRB (Transportation Research Board), desenvolvido para solos temperados e lateríticos. O MCT (Miniatura, Compactado, Tropical) e o G-MCT (Granular - Miniatura, Compactado, Tropical) oferecem uma abordagem mais adequada, classificando os solos tropicais em categorias finas e grossas, facilitando a previsão de suas propriedades e aplicações em pavimentação. A metodologia CUSL (Classificação Universal de Solos Lateríticos), que leva em consideração fatores como textura, granulometria e mineralogia, mostra-se promissora para a classificação de solos lateríticos, oferecendo uma abordagem abrangente e alinhada com as características específicas desses solos. Este estudo comparou esses métodos utilizando 20 amostras de solo de cinco estados brasileiros. As amostras foram analisadas quanto às propriedades químicas, físicas e mecânicas. O teste triaxial dinâmico foi utilizado para medir o Módulo Resiliente. Foi observada uma incompatibilidade direta entre os sistemas devido aos contextos distintos, sendo o TRB inadequado para solos tropicais. MCT e G-MCT apresentaram incompatibilidade parcial com o CUSL, destacando a necessidade de uma abordagem mais alinhada com as características tropicais para otimizar o desempenho dos pavimentos.