Accession Number : ADA182820

Title :   Recycling of Portland Cement Concrete Airport Pavements - An Experimental Investigation.

Descriptive Note : Final rept. Aug 83-May 86,

Corporate Author : NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA

Personal Author(s) : Hironaka,M. C. ; Cline,G. D. ; Shoemaker,N. F.

Report Date : JAN 1987

Pagination or Media Count : 108

Abstract : The objective of this study was to develop criteria and guidelines for recycling portland cement concrete (PCC) airport aprons. Included in this study are all aspects of the recycling process including breakup and removal, steel reinforcement removal, crushing, screening, stockpiling, mix design, testing, placing, finishing, and performance. Recycling of PCC requires some specialized equipment such as pavement breakers and electromagnets for steel removal; however, all of the other equipment and procedures are those commonly used in the construction industry. Based on the regression experimental design procedure and laboratory tests conducted on pavement samples from six airports of widely varying age and conditions, it has been conclusively shown that aged PCC pavements can be recycled into new surface courses that meet strength requirements and have the same cyclic load carrying (fatigue) characteristics as those constructed with virgin sand content - 42 percent.

Descriptors :   *AIRPORTS, *CONCRETE, *PAVEMENTS, *RECYCLED MATERIALS, *MATERIALS RECOVERY, APRONS, CEMENTS, CONSTRUCTION, EXPERIMENTAL DESIGN, SAMPLING, CRUSHING, ELECTROMAGNETS, LABORATORY TESTS, COST EFFECTIVENESS, STRENGTH(MECHANICS), FATIGUE(MECHANICS), OVERLAYS, REINFORCED CONCRETE, RECLAMATION, REPLACEMENT, MAINTENANCE, RUNWAYS, REGRESSION ANALYSIS, REMOVAL, STEEL, REQUIREMENTS, REMOVAL, STOCKPILES

Subject Categories : Terminal Flight Facilities
      Construction Equipment, Materials & Supplies
      Mfg & Industrial Eng & Control of Product Sys

Distribution Statement : APPROVED FOR PUBLIC RELEASE