Abstract: The present invention is directed to a heavy duty pavement structure comprising an open-graded asphalt layer fortified with a non-segregating grout mixture. The heavy duty pavement structure is made through the steps including forming an open-graded asphalt layer and then fortifying the layer with a non-segregating grout mixture that includes a predetermined amount of portland cement, sand and cement binder system.

Abstract: An extrusion die is made by stretching a flexible membrane having one end held in a shape conforming to the input end of the die and the other end maintained in conformity with the desired profile of the part to be extruded.A fluid having hardening properties is applied to one surface of the distended membrane. Once the material has hardened, the flexible diaphragm is stripped away, and the resultant contour is coated with a material to form the contour of the die. This contour is cast in a shell, with appropriate heat and heat sensing elements, to form the die.