Cabrera Gómez, Juan Daniel
Preferred name
Cabrera Gómez, Juan Daniel
Main Affiliation
Ambato
Email
jcabrera14@indoamerica.edu.ec
ORCID
0000-0002-7899-8929
Scopus Author ID
57891036700
3 results
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Item type:Publication, Effect of replacing mixing water with milk on the compressive strength of concrete at different curing ages(Frontiers Media SA, 2026-07-17); ; Zurita, MarcoIntroduction – The chemical composition of mixing water directly affects cement hydration and the strength development of concrete. Although alternative mixing liquids—such as treated wastewater, leachates, and wash water—have shown moderate strength reductions compatible with structural use, the behavior of concrete exposed to complex organic liquids remains largely uncharacterized. Methods – This study investigates how replacing mixing water with whole bovine milk, a medium rich in lactose, casein, and fat, affects cement hydration and compressive strength in conventional Portland concrete. Three mixtures with increasing replacement levels were produced: 0% (M0, control), 50% (M50), and 100% (M100). Twenty-seven cylindrical specimens (3 mixtures × 3 ages × 3 replicates) were tested under axial compression following ASTM C39/C39M at 15, 28, and 45 days. Peak strength, stress–strain curves, within-condition dispersion, and failure modes were recorded. Results – The control developed strengths of 14.39 ± 0.64, 16.47 ± 0.73, and 20.91 ± 0.81 MPa at 15, 28, and 45 days, whereas M50 and M100 remained below 1 MPa at all ages (M50: 0.61 ± 0.03, 0.67 ± 0.03, 0.90 ± 0.06 MPa; M100: 0.38 ± 0.02, 0.55 ± 0.02, 0.60 ± 0.03 MPa), a strength loss greater than 95% relative to the control. Coefficients of variation ranged from 3.9% to 6.1%, below the 10% threshold of ACI 214R. The modified mixtures also lost the ascending branch of the stress–strain curves and exhibited diffuse failure modes, without the longitudinal cracking typical of sound concrete. Conclusion – The magnitude of the strength loss (>95%) places milk in a category distinct from previously reported alternative mixing liquids. Rather than producing a degraded variant of conventional concrete, it generates a system in which the cementitious reaction is practically inhibited. This behavior, attributable to the combined action of lactose, casein, and fats on C3S hydration, redefines the operational limits of chemical compatibility between organic fluids and cementitious systems and provides a reference calibration point for predictive models of organic inhibition. Copyright © 2026 Pinto, Zambrano, Apraez, Gómez, Zurita and Buele. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, University Extension in Architecture: Strategies adopted by COVID-19(2022)Latin-American universities have reacted during pandemic times by implementing strategies not only virtual (Bedoya-Dorado, Murillo-Vargas, y González-Campo, 2021), the actions adopted over the road have allowed that the programme of extension continues being performed in other ways and to consider as not a requirement the permanent presential link with the community. The goal of the research is to analyze the strategies developed in community projects of University Extension in Architecture developed in seven Latin-American countries. The inquiry presents a methodology with combined strategies (Groat y Wang, 2013) that includes a literature review of primary and secondary sources, cases of study and interviews. This papers contains cuali-cuantitative data related to modes of working, alternatives of virtual communication in social media and elaborated knowledge of seven community projects selected from online activities developed by Architectural Latin-American universities in Costa Rica, México, Colombia, Ecuador, Chile y Argentina. The study found that the compilation of projects done last year and few years ago are the most used modes of working, also, digital material, Facebook pages and YouTube channels are the alternatives for virtual communication and finally, that digital publications and videos are the elaboration (Cano e Ingold, 2020), production (Salvatierra, 2003), (Cohen, 2014), (Martínez y García, 2019) and construction (Bolaños y Aguilera cited by Martínez y García, 2019) of knowledge. © 2022 The authors.20 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Sensory Landscapes from the South: The Case of a Neighborhood in Ambato, Ecuador(2025); ; Ashley Betsabé Zuleta SegoviaIn Ecuador, public space is considered dangerous and insecure. This may be related to the high violence rates many cities are currently facing. At the same time, most urban interventions are focused on improving the image of the environment, while paying less attention to how those spaces are experienced. Moreover, the sensorial dimension, as an indicator of the urban experience, is often ignored and understudied. In this context, the aim of this research is to categorize the sensory experience of urban space in Ingahurco, a neighborhood in Ambato. The questions that guided this work are as follows: What is the sensory experience in the area? What are its characteristic sensory features? The olfactive, tactile, sound, and alimentary marks of the neighborhood were collected and analyzed using sensory ethnography methods such as collective sensory walks, sound recordings, surveys, and texture sampling. This data was later processed using interactive maps and sensory representations to reconstruct the predominant sensory features of the site. This work shows that the analysis of urban space from the sensory approach discloses ignored dimensions of the urban experience, such as collective knowledge and meaning. The complexity of grasping and representing these data reveals opportunities for the creation of various means of representing the urban environment. Moreover, collective sensory walks can become a shared and meaningful means to take over public space in contexts of crisis and insecurity.52