ELECTRONIC DEVICE TO ESTIMATE AVERAGE LEAST DIMENSION OF ROAD AGGREGATE

The design, construction and operation of a device to estimate the average least dimension (ALD) of a sample of aggregate is explained. The device, referred to as an ALD meter, is as far as possible self regulating and requires only a minimum of interference from an operator. It consists essentially of a turntable and scanning arm to which is attached an infra-red sensor controlled by a personal computer. The aggregate is placed with its ALD in a vertical plane on a tray supported by the turntable. The table is rotated as the scanning arm moves inwards. The resulting spiral scan has the advantage of being free of backlash. Results are discussed and comparisons made with standard tests. The ALD meter is capable of providing rapid ALD results of an aggregate. (A) For the covering abstract of the conference see IRRD 873950.

Language

  • English

Media Info

  • Features: References;
  • Pagination: IV46-IV73

Subject/Index Terms

Filing Info

  • Accession Number: 00714412
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Dec 27 1995 12:00AM