Introduction: Economic evaluation of soil subgrade improvement using sugarcane bagasse ash case study: Propal Road - La Cabaña Sugar Mill”, developed at the Pontifical Javeriana University of Cali in 2022. Problem: Tertiary roads in Colombia are essential for mobility in rural areas and for the sugar industry, which generates waste such as sugarcane bagasse ash (SGBA). Objective: To present the results of the economic and technical feasibility study of using sugarcane bagasse ash for soil improvement in tertiary roads. Methodology: Characterization tests of natural soil state and modified Proctor, expansion index, CBR, and unconfined compression for stabilized soils at percentages of 5, 10, 15, and 20% of SGBA are carried out. Results: The mechanical properties of the soil improve with additions of ash between 5% and 15%; however, the utilization of 15% of SGBA is proposed to favor the disposal of a significant volume of this waste. Conclusion: The technical and economic feasibility of using SGBA as a promising solution to improve tertiary roads in Colombia is demonstrated. Originality: Viability of implementing sugarcane bagasse ash on rural roads of sugar mills and agricultural areas with production of this type of waste. Limitations: Similar studies should be carried out for each region to confirm the appropriate percentage for subgrade stabilization using SGBA.

The economic situation in certain regions of Colombia encourages child labor to support the family productive chain. Most studies that have been made present the statistics found at the urban level, so that the rural situation is lef out of indicators in that respect. However, one particular study undertaken in a rural community in Santander (Colombia) showed that child labor performed by children and young people is having an effct on school performance and dropout rates throughout life. Based on the results of this study, strategies were designed to minimize the effcts of child labor. As a result, initiatives are presented that could be made available to the academic community and society in order to mitigate negative impacts stemming from child labor. Additionally, the need for academia to make adjustments in curricula through the incorporation of new pedagogical strategies using learning based on problems, collaborative work and the creation of open programs and learning at a distance is proposed. Sensitization workshops are also proposed for society.

Introduction: This article highlights the relevant results of the study "Comparative evaluation of technical-economic solutions for internal systems of traditional and sustainable low-energy consumption housing: case study" developed in Pontificia Universidad Javeriana Cali between 2019 and 2021. Problem: The development corresponds to an applicable prototype, specifically in the community of Buenaventura, in Valle del Cauca (Colombia). This community has the highest multidimensional poverty index represented in the population of strata 1, 2, and 3, that often settle in areas with no urban facilities and where construction is made with no design criteria. As a result, the buildings will not satisfy basic needs, including water supply, the disposal of wastewater, and adequate electrical flow. Objective: The objective of this study is to show the technical feasibility and economic viability of sustainable social housing, where the end-user benefits from savings in public services such as energy, water supply, and wastewater. Methodology: The architectural design of the MINGA house, winner of the Solar Decathlon 2019 competition, is used as a platform to include a redesigned residential water supply system, wastewater system and electrical system. The designs of the domestic water supply system, wastewater system and electrical system for the house were developed on top of the original architectural blueprints, allowing for sustainable conditions applicable in low-income housing in the community of Bajamar, Buenaventura. Results: Alternative elements and equipment are proposed for the implementation of low consumption network systems. Originality: Feasibility of implementing low consumption system for homes in island regions. Limitations: System design for one level housing.