Accession Number : AD0628692

Title :   LOCKBOURNE NO. 3 PAVEMENT OVERLAY INVESTIGATION.

Descriptive Note : Final rept.

Corporate Author : OHIO RIVER DIV LABS MARIEMONT RIGID PAVEMENT LAB

Report Date : MAY 1951

Pagination or Media Count : 235

Abstract : The purpose of the investigation was to obtain data to aid in the formulation of criteria for the design of flexible pavements on a specially constructed concrete payment on a relatively plastic subgrade. The specific objectives were: (a) To determine, for the conditions at the test site, the thickness and type of flexible overlay required to produce a pavement adequate for capacity operation of planes weighing 120,000 pounds equipped with twin wheels as presently used on B-29 airplanes. (b) To determine the characteristics of the subgrade, concrete pavement and flexible pavement, to analyze the effects of traffic testing, and to aid in the formulation of design criteria. This program involved the testing of full scale pavement slabs by means of a traffic loading rig. The traffic loading rig consisted of a specially constructed unit producing a 60,000-pound load on twin 56 - inch x 23-inch airplane tires. The loading device simulated actual B-29 wheel loads, tire pressures and twin wheel spacing. The test section consisted of 3, 6, 9 and 12-inch flexible overlay pavement on top of a 9-6-6-9-inch concrete pavement. The jointing of the concrete pavement was of conventional construction, expansion and contraction types.

Descriptors :   (*LANDING FIELDS, PAVEMENTS), (*PAVEMENTS, FLEXIBLE STRUCTURES), SUBSTRATES, SOIL MECHANICS, CONCRETE, ASPHALT, EXPANSION, LOADS(FORCES), FRACTURE(MECHANICS), PERFORMANCE(ENGINEERING), RUNWAYS

Subject Categories : Terminal Flight Facilities
      Civil Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE