Rigid Pavement Placement
An overview of essential concepts in placement of ready mix concrete for rigid pavement construction. This includes placement, consolidation, finishing, curing, and jointing.
The general rigid pavement construction procedure involves placement, consolidation, finishing, curing and jointing in rapid succession. “Placement” involves any equipment or procedures used to place the delivered PCC on the desired surface at the desired thickness; “consolidation” involves any means used to eliminate undesirable voids; “finishing” involves any equipment or procedures used to impart desirable … Read more
Finishing involves all processes and equipment used to create the final surface finish and texture of fresh PCC. Generally, finishing can be divided into floating and texturing: Floating. A flat surface is run across the PCC in order to eliminate high and low spots, embed larger aggregate particles beneath the surface, remove slight imperfections and … Read more
Curing refers to the maintenance of satisfactory moisture and temperature within a PCC mass as it sets and hardens such that the desired properties of strength, durability and density can develop (PCA, 1988). The desired properties of strength, durability and density are related to the extent of hydration within the PCC mass; the more complete … Read more
Consolidation is the process of making the freshly placed PCC into a more uniform and compact mass by eliminating undesirable air voids and causing it to move around potential obstructions (such as reinforcing steel). Consolidation is usually accomplished using long, slender vibration rods called vibrators. Vibrators work by rotating an eccentric weight which causes the … Read more