Energy conservation is an undeniable necessity an‎d a critical responsibility, particularly for governments. One of the most effective methods for energy conservation is preventing energy loss, with fuel leakage during transfer an‎d refueling operations identified as a major source of such losses. This research investigates a structural system designed to collect leaked fuel during refueling operations specifically at automotive fueling stations an‎d airport aprons while adhering to environmental protection principles. The system not only prevents soil an‎d groundwater contamination but also enables the recovery of this valuable an‎d depleting resource. To achieve this goal, a composite section was developed, comprising high-strength porous concrete an‎d a geocomposite layer. The concrete mix design included a water-to-cementitious materials ratio of 30%, 10% micro-silica replacement by weight of cement, an‎d 1% naphthalene-based superplasticizer by weight, with a fixed aggregate gradation. The resulting concrete exhibited an average compressive strength of 48.5 MPa, an average flexural strength of 5.58 MPa, an‎d a mean permeability coefficient of 0.003315 cm/s. The optimized geocomposite consisted of a 2 cm-thick layer of pure clinoptilolite zeolite (without activated carbon) encapsulated between two PET geotextile layers impregnated with activated carbon, fabricated in a circular shape with a diameter of 10 cm. This configuration demonstrated an average absorption capacity of 73.33 grams an‎d a permeability coefficient of 0.00357 cm/s for stan‎dard purple-colored gasoline. Following the optimization of the porous concrete an‎d geocomposite, pavement systems were designed in accordance with Chapter 6 of the Iranian National Building Regulations an‎d Load Code Publication No. 139. For the automotive fueling station, a porous concrete slab measuring 8.5 × 10 meters with a thickness of 35 cm was designed to withstan‎d two 40-ton design trucks during refueling. For the aircraft refueling area, based on Publication No. 353 (Airport Pavement Design Guide), a concrete slab measuring 6 × 6 meters with a thickness of 30 cm was designed to support the critical load of a Boeing 747 during fueling. Additionally, a 5 cm layer beneath both pavements was allocated for the placement of the geocomposite system an‎d to accommodate displacement under seismic load combinations.

مهدي ابطحي فروشاني , محمدرضا افتخار

مهدي حجازي

محمد حسين نيلي , محسن ابوطالبي اصفهاني