THE PERMITTIVITY TEST FOR BITUMEN

Bitumens having a relatively high permittivity 'weather' more rapidly in rolled-asphalt wearing course than those with a lower value. The development of the permittivity test for bitumen is described. The method uses a commercially available micrometer capacitor with guard ring and the bitumen sample is cast into a parallel-faced glass cell. Permittivity is measured at 25 deg plus or minus 0.25 deg C using a bridge frequency of 1592 hz. The repeatability and reproducibility of the test are 0.006 and 0.008 respectively; this precision is considered to be adequate for an acceptance test. Possible further test development is outlined. /Author/TRRL/

• Corporate Authors:

  Transport and Road Research Laboratory (TRRL)

  Wokingham, Berkshire  United Kingdom 
• Authors:
  • DAINES, M E
• Publication Date: 1977

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: 31 p.

Subject/Index Terms

• TRT Terms: Bitumen; Bituminous materials; Capacitance; Electric insulating materials; Electricity; Errors; Insulating materials; Measuring instruments; Micrometers; Samples; Surface treating; Temperature; Test procedures; Testing; Tests; Weathering
• Uncontrolled Terms: Reproducibility
• Old TRIS Terms: Bituminous surfacing
• ITRD Terms: 6155: Apparatus (measuring); 4963: Bitumen; 6917: Capacity (electr); 6954: Electricity; 6440: Error; 6914: Insulation; 5927: Reproducibility; 6251: Sample (mater); 6722: Temperature; 6255: Test; 5281: Weathering
• Subject Areas: Highways; Materials; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00165632
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: TRRL Suppl. Rpt. 312Monograph
• Files: ITRD, TRIS, ATRI
• Created Date: Jun 14 1978 12:00AM