Crushed rocks stabilized with organosilane and lignosulfonate in pavement unbound layers: Repeated load triaxial tests

Diego Maria Barbieri, Inge Hoff, Chun Hsing Ho

Research output: Contribution to journalArticlepeer-review

Abstract

The creation of the new “Ferry-Free Coastal Highway Route E39” in southwest Norway entails the production of a remarkable quantity of crushed rocks. These resources could be beneficially employed as aggregates in the unbound courses of the highway itself or other road pavements present nearby. Two innovative stabilizing agents, organosilane and lignosulfonate, can significantly enhance the key properties, namely, resilient modulus and resistance against permanent deformation, of the aggregates that are excessively weak in their natural state. The beneficial effect offered by the additives was thoroughly evaluated by performing repeated load triaxial tests. The study adopted the most common numerical models to describe these two key mechanical properties. The increase in the resilient modulus and reduction in the accumulated vertical permanent deformation show the beneficial impact of the additives. Furthermore, a finite element model was created to simulate the repeated load triaxial test by implementing nonlinear elastic and plastic constitutive relationships.

Original languageEnglish (US)
Pages (from-to)412-424
Number of pages13
JournalFrontiers of Structural and Civil Engineering
Volume15
Issue number2
DOIs
StatePublished - Apr 2021

Keywords

  • crushed rocks
  • finite element analysis
  • lignosulfonate
  • organosilane
  • pavement unbound layers
  • repeated load triaxial test

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Architecture

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