SHOCK-ABSORBING MATERIALS. REPORT 4. AGING OF BACKPACKING MATERIALS.

Abstract

Seven materials that are currently being considered for use as backpacking around deeply buried protective structures and silos were investigated for the effects of particular phenomena which may be present or occur in the environments in which the materials may be used. Certain physical characteristics necessary for a better understanding of a material's behavior when used as a backpacking were also determined. The materials studied included three low-density concretes, two foamed plastics, foamed glass, and foamed sulfur. Each material was investigated for its strength-deformation characteristics and limitations, the effects of attack by groundwaters of different compositions, the effects of freezing and thawing, constrained consolidation, permeability, cyclic loading, constrained modulus of elasticity, brittleness, compatibility, and resistance to attack by fungi and bacteria. (Author)

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1968
Accession Number
AD0681910

Entities

People

  • George C. Hoff
  • James M. Holzer
  • William F. Mccleese

Tags

DTIC Thesaurus Topics

  • Bacteria
  • Biological Phenomena
  • Biomedical And Dental Materials
  • Biomes
  • Brittleness
  • Composite Materials
  • Concrete
  • Ecological And Environmental Phenomena
  • Elastic Properties
  • Environment
  • Expanded Plastics
  • Films
  • Freezing
  • Low Density
  • Materials
  • Modulus Of Elasticity
  • Plastics

Readers

  • Geotechnical Engineering.
  • Mechanical Engineering/Mechanics of Materials.
  • Polymer Science and Engineering.