In an effort to provide the foundation engineer with technical information about the geological formation, this report describes the location, distribution and quantity of the New Jersey shale, discusses the engineering aspects of the shale, describes laboratory testing methods for shale specimens, presents test results obtained from testing shale specimens, and summarizes the strength properties of shale as found in these studies. The shale formation varies in composition but the clay-size particles forming the bulk are mostly the mineral dioctahedral illite, powdery haemetite, and small amounts of kaolinite. The shale system is classed into 2 major groups: the unweathered sound shale; and the weathered overlying shale. Jointing and faults are prevalent, and a common feature is that the shale is broken up into fragments. The problems of foundation construction, excavation, drainage, and frost effects on roads and fills are reviewed. A discussion of the strength properties of this anisotropic sedimentary rock material of laminar structure and general brittleness, is based on laboratory study and covers strength assumptions in theories used in studies, as well as the strength parameters of shale. Details are given of the collection of shale samples, equipment, test specimen preparation, and the instrumentation of shale core specimens. Testing methodology is detailed and test results are presented. Conclusions are presented which are based on the study and related to geological aspects, the laying of foundations, laboratory study, shale rock mechanics, core recovery and the fractured nature of the rock, the comparison of theoretical and experimental data, shear strength, and the orientation of lamination of shale with respect to the axis of loading.

  • Corporate Authors:

    Rutgers University, New Brunswick

    College of Engineering
    New Brunswick, NJ  United States  08903
  • Authors:
    • Jumikis, A R
    • Jumikis, A A
  • Publication Date: 1975

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 75 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00098649
  • Record Type: Publication
  • Report/Paper Numbers: Eng Res Bul No. 55
  • Files: TRIS
  • Created Date: Sep 10 1975 12:00AM