Compressive behavior of pervious concretes and a quantification of the influence of random pore structure features

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Abstract

Properties of a random porous material such as pervious concrete are strongly dependent on its pore structure features, porosity being an important one among them. This study deals with developing an understanding of the material structure-compressive response relationships in pervious concretes. Several pervious concrete mixtures with different pore structure features are proportioned and subjected to static compression tests. The pore structure features such as pore area fractions, pore sizes, mean free spacing of the pores, specific surface area, and the three-dimensional pore distribution density are extracted using image analysis methods. The compressive stress-strain response of pervious concretes, a model to predict the stress-strain response, and its relationship to several of the pore structure features are outlined. Larger aggregate sizes and increase in paste volume fractions are observed to result in increased compressive strengths. The compressive response is found to be influenced by the pore sizes, their distributions and spacing. A statistical model is used to relate the compressive strength to the relevant pore structure features, which is then used as a base model in a Monte-Carlo simulation to evaluate the sensitivity of the predicted compressive strength to the model terms.

Original languageEnglish (US)
Pages (from-to)402-412
Number of pages11
JournalMaterials Science and Engineering A
Volume528
Issue number1
DOIs
StatePublished - Nov 25 2010

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Keywords

  • Pervious concrete
  • Pore sizes
  • Pore structure
  • Porosity
  • Statistical analysis
  • Stress-strain relationships
  • Uniaxial compression

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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