Durandal is a bomb not a rocket, even if propelled by a rocket booster before impact.
From wikipedia:
Named for a mythical medieval French sword, the Durandal is a bomb developed by the French company Matra (now MBDA France, a branch of EADS), designed to destroy airport and airfield runways.
Designed to be dropped from low altitudes, the bomb's fall is slowed by a parachute. When the bomb is vertical due to the parachute's drag, it fires a rocket booster that accelerates it into the runway surface. The bomb explodes after it has penetrated the surface. This results in a crater that is large and difficult to repair, worse than a conventional bomb of comparable warhead size. The rocket can penetrate up to 40 centimeters of concrete, and creates a crater 5 meters deep and approximately 16 meters in diameter.
Durandals weigh 204 kg (450 lb) and are 2.5 m (8 ft 2 in) long. The warhead is made of 150 kg (330 lb) of high explosives.