The pickett effect at early age and experiment separating its mechanisms in tension

S. A. Altoubat, David A. Lange

Research output: Contribution to journalArticle

Abstract

A new experimental approach that allows separation of the components of the Pickett effect due to surface microcracking and stress-induced shrinkage is developed and demonstrated for early age concrete subjected to tensile loads induced in restrained shrinkage tests. The experiment measures creep of three concrete materials subjected to same loads, but under different environments: moist-cover, sealed, and drying conditions. The key features of the experiment are the suppression of shrinkage in the moist-cover test, and the uniform internal drying in the sealed test. The results confirm that the Pickett effect in tension has two sources: stress-induced shrinkage and microcracking. The new approach provides insight to creep, shrinkage, softening, and cracking behaviors under tensile load, and explains behavioral differences between plain and fiber reinforced concrete.

Original languageEnglish (US)
Pages (from-to)211-218
Number of pages8
JournalMaterials and Structures/Materiaux et Constructions
Volume34
Issue number248
DOIs
StatePublished - May 2002

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)
  • Mechanics of Materials

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