Effect of grout on mechanical properties and cracking behavior of rock-like specimens containing a single flaw under uniaxial compression

Huilin Le, Shaorui Sun, Pinnaduwa Kulatilake, Jihong Wei

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

To investigate the influence of the geometry of a fracture and grouting on failure behaviors and mechanical properties of rock masses, uniaxial compressive tests were conducted on rock-like specimens containing single unfilled and grout-infilled flaws having different geometries. The compressive strength, deformation behaviors, and failure modes were studied and compared among the said specimens. Grouting improves the strength of grouted specimens through the following two mechanisms: (1) by increasing the shear-strength parameter values of the interface between the grout and model material and (2) by reducing the stress concentration at the flaw tips. Seven and eight crack types identified based on the crack geometry and crack-propagation mechanisms were used to analyze the failure modes of the specimens with the unfilled flaws and the grout-infilled flaws, respectively. An equivalent strength theory is introduced to predict the strength and the range of the flaw inclination angle of the grouted specimens for which the damage occurs along the interface between the grout and model material.

Original languageEnglish (US)
Article number04018129
JournalInternational Journal of Geomechanics
Volume18
Issue number10
DOIs
StatePublished - Oct 1 2018

Keywords

  • Crack types
  • Failure mode
  • Flaw geometry
  • Grout-infilled flaw
  • Mechanical properties
  • Peak strength

ASJC Scopus subject areas

  • Soil Science

Fingerprint Dive into the research topics of 'Effect of grout on mechanical properties and cracking behavior of rock-like specimens containing a single flaw under uniaxial compression'. Together they form a unique fingerprint.

Cite this