Measurement of water absorption of very fine particles using electrical resistivity

Jihwan Kim, Goangseup Zi, David A. Lange

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

This paper presents an electrical resistivity method for measuring water absorption of very fine particles, making it easier to characterize stock materials that may be recycled in construction applications. The fine particles of interest in this study come from recycled concrete, limestone, and natural sand sources, and retained on No. 100 and No. 200 sieves. The electrical resistivity of fines is used to indicate water content. The saturated surface-dry (SSD) state is defined as a percolation threshold that is detected using electrical resistance measurements. This study shows that recycled concrete fines exhibit a higher percolation threshold than of limestone and natural sand fines. The percolation threshold value of the water content is not sensitive to mold shape (cylinder and prism) and resistivity measurement method (two-probe and fourprobe methods). The results suggest that this method is an easy and reproducible means for measuring the water absorption of recycled fines, thus addressing a serious barrier to their wide acceptance in practice.

Original languageEnglish
Pages (from-to)957-966
Number of pages10
JournalACI Materials Journal
Volume114
Issue number6
DOIs
Publication statusPublished - 2017 Nov 1

Keywords

  • Conductivity
  • Limestone powder
  • Percolation threshold
  • Recycled concrete fines
  • Resistivity
  • Saturated surface-dry (SSD) condition
  • Specific gravity
  • Water absorption

ASJC Scopus subject areas

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

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