Stability of Strength and Deformation Characteristics of Expanded Polystyrene (EPS) within the Time of Long-Term Investigation of Creep Strain under Permanent Compressive Loading

  • Saulius VAITKUS Vilnius Gediminas Technical University
  • Ivan GNIP Vilnius Gediminas Technical University
  • Sigitas VĖJELIS Vilnius Gediminas Technical University
Keywords: expanded polystyrene slabs (EPS), short-term compression, aging, long-term compression

Abstract

The results of investigation of strength (s10 %, scr) and deformability (E) characteristics of expanded polystyrene specimens are presented. The results are based on the short-term compression in the organization of long-term creep study. For the experiments identical specimens stored 5 years at ambient temperature (23 ±2) °C and relative humidity (50 ±5) % as well specimens after removal long-term loading were used. There were established, that difference between experimental values of stress and initial modulus of tested expanded polystyrene specimens with confidence probability P = 90 % (on-sided test) is negligible (random).

DOI: http://dx.doi.org/10.5755/j01.ms.19.2.4442

Published
2013-05-23
Section
CONSTRUCTION MATERIALS