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Madlangbayan, Marish S.
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Civil Engineering, Building, Construction & Architecture

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Structural and Thermal Performance Assessment of Shipping Container as Post-Disaster Housing in Tropical Climates Zafra, Richelle G.; Mayo, John Rheynor M.; Villareal, Patrick Jasper M.; De Padua, Victor Mikael N.; Castillo, Ma. Hazel T.; Sundo, Marloe B.; Madlangbayan, Marish S.
Civil Engineering Journal Vol 7, No 8 (2021): August
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/cej-2021-03091735

Abstract

Shipping Containers (SC) are a viable option as temporary or permanent housing for disaster victims due to their modularity, strength, and availability in large quantities around the world. While SCs as alternative housing has been extensively explored, few studies have focused on the structural and thermal performance of SCs in a tropical monsoon climate. This paper aims to contribute to a better knowledge of SC building construction by (1) investigating the SCs structural performance when subjected to a variety of loads, including gravity, earthquake, and very strong typhoon, and (2) assessing the thermal performance in a hot and humid climate. The case of Leyte, Philippines, a hot, humid, and typhoon-frequented region, is considered in this study. To meet the objectives, two SCs were combined to build a single-family house. First, the structural strength of the SCs, including the effect of cuts and openings, were investigated using finite element analysis. Second, the thermal condition of the SC was compared using four models with different insulation materials: no insulation, PE foam insulation (R-12), slightly higher insulation (R-13 fiberglass batt), and very high insulation (R-49 fiberglass batt) through building energy simulation. The paper concludes that SCs have inherently high strength and can withstand strong wind and earthquake. Stresses due to cuts and openings were minimized when the cuts/openings were placed far from the corner posts. On the other hand, increasing insulation R-value did not improve the indoor thermal condition of the SCs. More work needs to be done on making SCs thermally comfortable in hot and humid climates. Doi: 10.28991/cej-2021-03091735 Full Text: PDF
Life Cycle Assessment of Phosphogypsum as Filler Material for Coal Fly Ash-Based Geopolymer Paulo, Jacob Louies Rohi W.; Pablo, Michelle Airah N.; Pocaan, Joshua P.; Promentilla, Michael Angelo B.; Beltran, Arnel B.; Madlangbayan, Marish S.; Palattao, Botvinnik L.; Ramirez, Jennyvi D.; Tabelin, Carlito B.; Resabal, Vannie Joy T.; Orbecido, Aileen H.; Tapia, John Frederick D.; Pausta, Carla Mae J.
Civil Engineering Journal Vol. 11 No. 9 (2025): September
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2025-011-09-024

Abstract

The global accumulation of phosphogypsum (PG), with annual generation exceeding 175 Mt/year, presents significant environmental challenges. While studies have demonstrated PG's potential as a filler material in geopolymer composite, comprehensive environmental impact assessments of such valorization approaches remain limited. This study presents the first comparative life cycle assessment (LCA) of acid- and alkali-activated PG-CFA geopolymers in the context of sustainable industrial waste management. Geopolymer technology can eliminate the need for traditional landfilling of PG in coastal areas and, therefore, reduce their negative environmental impacts. LCA was conducted to assess the impacts of repurposing 1kg functional unit of PG as geopolymer precursors coupled with acid- and alkali-based activators compared to the current disposal practices of these solid wastes. The inventory was modeled after a phosphoric acid plant using the wet dihydrate process, a coal-fired power plant, and a laboratory-scale coal fly ash-phosphogypsum geopolymer (FAPG) synthesis upscaled for industrial application. The most number of environmental benefits was observed for acid FAPG particularly via reductions in CO2-eq emissions by 40%, 90% in energy consumption, and 36% in mineral resource extraction. Alkali FAPG excelled in water acidification and scarcity by 60% and it could outperform acid FAPG environmentally via sensitivity analysis under a similar formulation blend. Further research can focus on optimizing FAPG formulation, finding alternatives for the acid and alkali activators, and reviewing industrial standards for widespread FAPG applications. These results imply the potential of integrating FAPG manufacturing in PG- and CFA-generating industries to emulate a circular economy.
Co-Authors Beltran, Arnel B. Castillo, Ma. Hazel T. De Padua, Victor Mikael N. Mayo, John Rheynor M. Orbecido, Aileen H. Pablo, Michelle Airah N. Palattao, Botvinnik L. Paulo, Jacob Louies Rohi W. Pausta, Carla Mae J. Pocaan, Joshua P. Promentilla, Michael Angelo B. Ramirez, Jennyvi D. Resabal, Vannie Joy T. Sundo, Marloe B. Tabelin, Carlito B. Tapia, John Frederick D. Villareal, Patrick Jasper M. Zafra, Richelle G.