详情

原文传递 DAMAGE TO AIRCRAFT PARKING RAMPS FROM JET OILS AND AUXILIARY POWER UNITS.

题名：	DAMAGE TO AIRCRAFT PARKING RAMPS FROM JET OILS AND AUXILIARY POWER UNITS.
作者：	McVay-MC; Manzione-CW; Murphy-JG
关键词：	AIRCRAFT-PARKING-RAMPS; PAVEMENT-DAMAGE; JET-OILS; AUXILIARY-POWER-UNIT-BLASTS; SCALING-; LABORATORY-TESTS; CHEMICAL-REACTIONS; CONCRETE-PAVEMENTS; CALCIUM-HYDROXIDE
摘要：	The precise cause for concrete damage observed in the vicinity of parked B-1 and F/A-18 aircraft has been determined. The combination of downward-directed auxiliary power unit (APU) blast and spilled aircraft oils are responsible for the scaling observed at these sites. Laboratory tests confirmed that ester-based lubricating oils and hydraulic fluids are chemically reacting with the hydroxyl component from the calcium hydroxide or the calcium silicate hydrate in the concrete and destroying the bond. The cyclic heating of the pavement by the APU greatly accelerates the reaction and facilitates the mixing and refluxing of aircraft fluids with the aqueous calcium hydroxide present. Laboratory techniques are demonstrated that duplicate the chemical reactions occurring in the field and allow for quick and accurate assessment of new materials before field testing. In addition, hydrolysis of lubricating oils and hydraulic fluids was replicated in a controlled laboratory experiment within 5 weeks, eroding a 10-cm (4-in.) concrete slab that was kept partially submerged in water.
总页数：	Transportation Research Record. 1993. (1382) pp82-88 (5 Phot., 2 Fig., 1 Tab., 11 Ref.)
报告类型：	科技报告