Development of the road aggregate test specifications for the modified ethylene glycol durability index for basic crystalline materials

Robert C. Leyland, Phil Paige-Green, Moe Momayez

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Many basic igneous rocks contain smectite clays as a result of deuteric alteration during their formation or subsequent chemical decomposition. This has resulted in numerous failures when such materials are used in road construction due to inadequate durability. Various methods for assessing material durability have been developed and those using ethylene glycol (EG) to expand smectite clays appear to be the most effective. Protocols have been developed for a number of tests using EG, but it can be difficult to quantify the results in terms of unique values and develop specification limits for use in road construction. A simple new protocol for an EG soaking test, the modified ethylene glycol durability index (mEGDI), has been developed and the proposed interpretation of results is compared with existing specifications in this paper. The mEGDI is suitable for use as a screening test to identify poor-durability materials. However, inconsistent correlations with existing specifications exist for materials classified as durable by the mEGDI test and such materials require traditional testing before acceptance. The development of a rapid mEGDI is being investigated to reduce the time required to complete the test and therefore provide a useful screening test methodology.

Original languageEnglish (US)
Article number04014028
JournalJournal of Materials in Civil Engineering
Volume26
Issue number7
DOIs
StatePublished - 2014

Fingerprint

Ethylene Glycol
Ethylene glycol
Durability
Crystalline materials
Specifications
Road construction
Screening
Clay
Igneous rocks
Decomposition
Testing

Keywords

  • Base
  • Basic crystalline materials
  • Durability
  • Ethylene glycol

ASJC Scopus subject areas

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

Cite this

Development of the road aggregate test specifications for the modified ethylene glycol durability index for basic crystalline materials. / Leyland, Robert C.; Paige-Green, Phil; Momayez, Moe.

In: Journal of Materials in Civil Engineering, Vol. 26, No. 7, 04014028, 2014.

Research output: Contribution to journalArticle

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