Polymer concrete paving machine

Abstract

A self-propelled paver that distributes, consolidates, places and finishes polymer concrete to rapidly resurface roadbeds. A mobile, wheeled chassis mounts an adjustable hopper that receives premixed polymer from a mixer truck that precedes the paver. A finishing assembly secured to the chassis has a distribution assembly for applying concrete transversely across the surface, and a trailing finishing screed that surfaces and densifies the concrete. An active, hydraulic suspension dynamically orients the chassis and the finishing assembly with the roadbed. Individual height adjusting cylinders can be extended or contracted by an automatic grade control that logically senses grade through an external string line. The distribution system comprises an open bottom exposing the surface to be paved, and an open top adapted to receive concrete from a trough extending from the hopper. A bidirectional auger is rotatably disposed within a distribution box for moving concrete upon the surface. The finishing screed comprises a rigid strike off that initially contacts uncompacted concrete laid by the distribution system. An intermediate pan extending between the strike off and a trailing bull float mounts a plurality of vibrators that facilitate concrete densification. The vertically displaceable hopper can be adjusted to an appropriate operative orientation relative to the mixing truck. When tested in place with a nuclear densitometer, resultant concrete density will meet or exceed standards established for all modern paving jobs. Ride quality as measured by a profilograph according to known procedures will meet all established standards.