Polyurethane Expanding Foam Application: A Proposed Alternative Solution for Cracks on Local Concrete Roads in The Philippines

Abstract

This study examined the use of polyurethane expanding foam as a potential solution for repairing cracks on local concrete roads in the Philippines. The researchers conducted the study in Pangatlan, Mexico, Pampanga, for a period of six weeks. The polyurethane foam was applied in different crack width categories to monitor its performance as a viable repair, observe physical and chemical changes, and assess its adhesiveness. The crack widths are subdivided into three categories: category I (1 to 15 mm), category II (16 to 30 mm), and category III (31 to 45 mm), with three samples per category. The results showed that the foam is applicable for all categories, with widths ranging from 3.60 to 41 mm. Polyurethane foam changed its color due to environmental factors but remained adhered to concrete, with a rough outermost layer, and some areas shrank due to vehicular loads. As a result, this study suggests that polyurethane expanding foam can be used as a temporary solution for repairing local concrete roads in the Philippines wherein urgent repair is needed due to its ability to adhere with the concrete pavement. This study recommends a longer observation period, which could be beneficial for capturing the long-term effects and durability of the polyurethane foam on the concrete pavements.