A flap for an asphalt hopper of an asphalt paver includes a sheet of a first material arranged to, in a non-deformed configuration, extend upwards from a base of the asphalt hopper and at least partially enclose one end of the asphalt hopper. The flap further includes a support member of a memory metal material coupled to the sheet. The support member has a deformed configuration and a non-deformed configuration. The support member experiences shape memory effect above a transition temperature that causes the support member in the deformed configuration to transition to the non-deformed configuration in response to heating at or above a transition temperature and also urges the sheet to return to the non-deformed configuration from a deformed configuration.