Conference Agenda

Inadequate management of construction and demolition waste (CDW) represents a significant environmental challenge in countries where its reuse remains limited. In this context, the present study experimentally evaluates the influence of partial replacement of fine and coarse aggregates with recycled concrete obtained from rigid pavement demolition on the compressive strength of pedestrian pavers designed for f’c = 320 kg/cm². An applied quantitative experimental design was implemented, considering a total sample of 72 specimens distributed across four replacement levels: 0%, 5%, 10%, and 15%. Compressive strength tests were conducted in accordance with current standards, and statistical analysis included both descriptive and inferential methods (ANOVA and Tukey tests) to determine significant differences among treatments. The results showed average compressive strengths of 409.73 kg/cm² (0%), 404.45 kg/cm² (5%), 401.85 kg/cm² (10%), and 397.14 kg/cm² (15%), with all values remaining above the required design strength. Statistical analysis confirmed that replacement levels up to 15% do not produce critical reductions in mechanical performance. It is concluded that incorporating recycled concrete in Type I pedestrian pavers constitutes a technically viable alternative consistent with NTP 399.611 requirements, contributing to the sustainable valorization of CDW.

The search for sustainable alternatives in civil construction has driven the use of agricultural and industrial byproducts to optimize concrete performance and reduce its environmental impact. This research evaluates the reduction in cement and fine aggregate usage through the inclusion of alternative materials such as rice husk ash (RHA) and recycled glass powder (GGP), respectively, analyzing their effect on the physical and mechanical parameters of 27.46 MPa rigid pavement concrete. Ten mix designs were prepared with proportions of 0%, 5%, 10%, and 20% RHA and 0%, 10%, 15%, and 20% GGP, under controlled curing and testing conditions for 28 days. The results show that the incorporation of CCA increased compressive and flexural strength by up to 15%, thanks to its high silica content, which promotes the formation of hydrated calcium silicate gels. Meanwhile, PVR improved density and reduced porosity by acting as a micro-filler, strengthening the concrete matrix. This combination resulted in a more compact structure with better particle packing and greater durability under load and surface wear. The best-performing mixture was the one with 5% CCA and 20% PVR, achieving the optimal balance between strength, compactness, and sustainability, making it an efficient and environmentally friendly alternative for rigid pavement construction

The Downdrag or negative skin friction phenomenon constitutes a critical aspect in the design of deep foundations, particularly for piles installed in soft or stratified soils, where settlement of the surrounding soil generates a relative downward displacement that induces negative shear stresses along the pile shaft. This mechanism mobilizes an additional load that adds to the applied structural loads and may reduce the available axial capacity of the pile while increasing settlements. Despite its relevance in infrastructure projects founded on compressible soils, the evaluation of Downdrag still presents challenges associated with the complexity of soil–pile interaction and the influence of geometric and stratigraphic variables. The objective of this research is to evaluate the load-bearing capacity and settlements of piles constructed in stratified soils affected by Downdrag through a comparative analysis between traditional analytical methods and computational analysis. For this purpose, 45 case studies representing different stratigraphic configurations and thicknesses of critical cohesive soil layers were analyzed, also considering variations in pile diameter. The computational analysis was performed using the pile module of the GEO5 software, which is based on analytical formulations of soil–pile interaction. The results show that increasing the thickness of the critical cohesive soil layer has a significant influence on pile behavior. Analytical calculations and computational analysis showed high agreement in the estimation of shaft and tip bearing capacity (differences lower than 2.5%). However, settlement predictions exhibited larger discrepancies, highlighting the influence of soil stratigraphy, the thickness of cohesive layers susceptible to settlement, and pile diameter on the development of Downdrag.

In recent years, traffic congestion has become a global problem that worsens annually, impacting mobility and quality of life in modern cities. The objective of this systematic review of scientific literature published between 2012 and 2025 is to analyze the application strategies of Vissim PTV (Public Traffic Management) systems to improve urban traffic management. To this end, a systematic search was conducted in two databases: Scopus and ScienceDirect, applying the PRISMA method with a PICO question approach to identify articles that met the eligibility criteria for the search, selection, and data extraction. The STROBE tool was used to assess the risk of bias, along with Robvis for domain analysis. Results: Thirty-five studies (n=478) were included to compile different vehicular mobility management strategies, which are divided into geometric and control improvements. The study showed that the efficiency level of the simulated measure in Vissim varies depending on traffic volume, type, and road geometry. In conclusion, Vissim software is used to model everything from intersections to complex networks, and the solutions focus on geometric interventions (roundabouts and grade separations) for structural problems and dynamic management (adaptive traffic lights) to optimize road capacity. The reliability of the simulation depends on calibration and validation using GEH<5 and MAPE<15%~25%. In summary, geometric improvements achieve the greatest delay reductions (>60~90%).

This research evaluated the influence of adding recycled and shredded PET on the stabilization of SW-SM (silty sands) and ML (silts) soils collected in the Baños del Inca district, Cajamarca. The methodology employed was applied and experimental, utilizing Modified Proctor and CBR tests following ASTM and NTP standards. Initially, the SW-SM soil had a CBR of 12.30%, while the ML soil had a value of 9.80%. When PET was added in proportions of 1%, 3%, and 5%, the mixture with 5% PET proved to be the most efficient, increasing the strength of the SW-SM soil to 17.80% (a 44.71% improvement) and the ML soil to 14.10% (a 43.88% improvement).

This study explored the enhancement of silty soil strength through the incorporation of granular rubber derived from sports field waste. The methodology involved performing laboratory tests following ASTM and AASHTO standards. The soil analyzed, classified as A-76(38) under both the SUCS and AASHTO systems, consists of medium plasticity organic clays and low plasticity organic silty clays. Initially, the soil exhibited a low CBR (California Bearing Ratio) of 12.8%, making it unsuitable as subgrade or base material. However, the addition of granular rubber resulted in a progressive increase in CBR values: with 1% rubber, the CBR rose to 13.42%; with 2%, it reached 14.37%; with 3%, it improved to 15.66%; and with 4%, it increased to 16.94%. These results demonstrate that granular rubber significantly enhances the soil’s strength, improving its suitability as a subgrade material. The study concludes that the incorporation of granular rubber is an effective and sustainable method for stabilizing silty soils, significantly boosting their bearing capacity. Furthermore, this approach offers an ecological benefit by contributing to the recycling of rubber waste, which would otherwise contribute to environmental pollution. In addition to its technical advantages, the use of recycled rubber promotes environmental sustainability, offering a cost-effective and eco-friendly solution for improving subgrade materials in construction projects. This research, therefore, presents an innovative method for enhancing soil performance while addressing waste management and sustainability challenges.