SOME APPLICATIONS OF BORON TRACER TECHNIQUE (PART I) /IN JAPANESE/

A NEW TECHNIQUE EMPLOYING BORON AS A TRACER AND A NEUTRON MOISTURE METER AS A DETECTOR HAS BEEN DEVELOPED. BORON, WHICH HAS A LARGE ABSORPTION CROSS SECTION WITH RESPECT TO THERMAL NEUTRONS, IS A RARE CONSTITUENT OF SOILS. WHEN USED AS A TRACER, IT REDUCES THE COUNTING RATE OF THE DETECTOR. EXPERIMENTS WERE UNDERTAKEN TO DETERMINE THE RELATION BETWEEN BORON CONCENTRATION CHANGES AND COUNTING RATE. THE RESULTS SHOWED THAT THE RATE VARIED EXPONENTIALLY WITH CONCENTRATION, A RESULT IN AGREEMENT WITH FERMI'S AGE EQUATION. ON-SITE APPLICATIONS OF THE TECHNIQUE ARE GIVEN, WITH BORON USED IN THE FORM OF A SOLUTION, A POWDER CONTAINING GLASS AND MINERALS, ALLOYS, AND OCCASIONALLY GASES. THE APPLICATIONS DESCRIBED ARE DETERMINATION OF THE QUALITY AND AREA GROUTED INTO THE GROUND, MEASUREMENT OF SOIL SETTLEMNT, AND MEASUREMENT OF THE DISTRIBUTION OF CONCRETE BATCHES IN THE CONSTRUCTION OF UNDERWATER WALLS.

• Supplemental Notes:
  • Vol 18, pp 115-123, 13 FIG, 2 TAB, 5 REF
• Corporate Authors:

  Kajima Inst Constr Tech /Japan

  ,    
• Authors:
  • Ariizumi, A
  • Yamamoto, T
• Publication Date: 1969

Subject/Index Terms

• TRT Terms: Boron; Concrete placing; Field tests; Ground settlement; Grouting; Moisture meters; Neutrons; Nondestructive tests; Nuclear tests; Physical distribution; Soils; Tracers (Chemistry); Tremie concrete
• Old TRIS Terms: Insitu methods; Tracers; Tremie method
• Subject Areas: Freight Transportation; Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00217167
• Record Type: Publication
• Files: TRIS
• Created Date: Feb 15 1972 12:00AM