This report describes the site investigation, laboratory testing and site control and gives details of the construction project. The question of the suitability limits for boulder clay is also discussed. The use of boulder clay as fill resulted in an estimated saving of 1.5 pounds sterling per cubic metre. The compaction requirements for well graded granular and dry cohesive soils are tabulated. It was found that for vibratory rollers in the 161-200 lb static load category, an 8 in. maximum layer necessitated four passes of the roller. Provided the soil has a moisture content between 10 and 20 percent, four passes of the roller compacted the soil to about 5% air voids. The weight of evidence suggests that for the soils tested on this contract, the vibrating rollers attained the required density without extra rolling at moisture contents in excess of 1% below the optimum moisture content determined using the B.S. 5.5 lb (2.5 kg) rammer method of compaction. At lower moisture contents watering of the fill would be advisable if large quantities are involved and more suitable material is not available. Experience on site indicated that the minimum criterion of 3% C.BR. which was adopted for plant mobility was about correct.

  • Corporate Authors:

    An Foras Forbartha

    St Martin's House, Waterloo Road
    Dublin 4,   Ireland 
  • Authors:
    • DAVITT, S
    • Bonner, G A
  • Publication Date: 1974-12

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 62 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00184603
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 3 1979 12:00AM