Compaction and lightweight SFRC mine cribs

A. Nanni, C. Corbitt, M. Phang

Research output: Contribution to journalConference articlepeer-review

Abstract

The use of steel fiber reinforced concrete (SFRC) in mine roof support systems as a substitute of traditional wood construction has proven to be successful. Further improvements of this technology could be obtained using SFRC crib-blocks either consolidated by compaction or having a lightweight matrix. Test results indicate that both compacted and lightweight SFRC crib-blocks behave similarly to conventional SFRC construction as reported in the literature. Half-scale crib models have a load bearing strength of approximately 50% the 28-day ultimate compressive strength of quality control specimens. The proposed compaction method has the advantages of decreasing portland cement content, relaxing aggregate gradation requirements, and easing fabrication. On the other hand, the use of lightweight aggregates in the conventional construction procedure facilitates product hauling and handling without impairing structural integrity.

Original languageEnglish (US)
Pages (from-to)351-365
Number of pages15
JournalAmerican Concrete Institute, ACI Special Publication
VolumeSP-105
StatePublished - Dec 1 1987

Keywords

  • Compacting
  • Cribbing
  • Fiber reinforced concretes
  • Lightweight aggregate concretes
  • Metal fibers
  • Mines (excavations)
  • Roofs
  • Supports

ASJC Scopus subject areas

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

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