Hi Peter (and others)
Given your interest in material properties, I thought you might be interested to see the following papers:
https://www.fhwa.dot.gov/publication.../13060/003.cfm - If you scroll down to the 'modulus of elasticity' subheading, this study subjected untreated and heat-treated samples of a UHPC mix to modulus testing in both compression and direct tension tests. The samples tested in direct tension achieved higher elastic modulus than their compression counterparts; with heat treated samples achieving 51.9Gpa in direct tension and 50Gpa in compression respectively. This trend of slightly higher elastic modulus in tension is in agreement with an earlier paper I posted which analysed a standard concrete. This may be a significant distinction between UHPC and epoxy granites/polymer concretes.
https://link.springer.com/article/10...70-021-07118-y - This paper investigates: a natural granite; a UHPC and two types of epoxy granite for creep behavior with a specific focus on precision machinery structures. I wonder whether the elastic modulus in tension could explain this papers finding of lower creep deformation in the UHPC relative to the epoxy granite samples.
Just thought I'd share what I've come across.
Mike