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Stray reference (correctly) removed from article, but probably useful:

Damage to Foundations from Expansive Soils, J. David Rogers, Robert Olshansky, and Robert B. Rogers

Argyriou (talk) 02:53, 13 August 2011 (UTC) reply

This article conflates expansive clay (e.g., smectites) with expanded clay (e.g., aggregates produced by firing shale). I would suggest removing all references to aggregate. (New to this...sorry if I haven't followed proper formatting).

Cementguy ( talk) 15:46, 26 June 2017 (UTC)Cementguy reply