Accession Number : AD0488370

Title :   SMALL-SCALE MODEL STUDY TO DETERMINE THE EFFECTS OF SAWKERFS AND BORED RECESSES ON LOAD-CARRYING CAPACITY OF RIGID PAVEMENT.

Descriptive Note : Final rept.,

Corporate Author : OHIO RIVER DIV LABS CINCINNATI

Personal Author(s) : Behrmann, Ruth M.

Report Date : AUG 1966

Pagination or Media Count : 80

Abstract : Full-scale pavement was simulated in the model tests by Hydrostone slabs 0.200 inch in thickness by 16 3/4 inches square, supported by a natural rubber subgrade. For the range of prototype conditions represented by the model, the test results indicated the following: (1) A recess of any depth tends to lower the load-carrying capacity of a slab. Depending on the type of fixture, the load-carrying capacity could be reduced as much as 39% by extending the recess completely through the slab. (2) Sawkerfs perpendicular to the edge tend to reduce the load-carrying capacity of a slab, the amount of reduction being dependent on the depth of the sawkerfs. (3) In a slab containing a recess, a sawkerf, or both, the stress per pound of load is constant throughout the elastic range of the slab and subgrade. (4) Crack patterns associated with the initial failure of a plain slab and a slab containing a recess are practically identical. (5) Cracking associated with the complete failure of a slab containing a recess is more extensive than that associated with a plain slab. (6) With a recess near the edge and completely through a slab, critical stresses may develop at the edge of the recess rather than at the edge of the slab.

Descriptors :   (*PAVEMENTS, LOADS(FORCES)), MODEL TESTS, PERFORMANCE(ENGINEERING), ORIFICES, FLAT PLATE MODELS, STRESSES, FRACTURE(MECHANICS), FAILURE(MECHANICS), CONCRETE, SIMULATION, RUNWAYS, CONSTRUCTION, SCALE, STRUCTURAL PROPERTIES, THICKNESS, STRAIN(MECHANICS), CUTTING, DRILLING.

Subject Categories : Ceramics, Refractories and Glass
      Civil Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE