[badhabit]

Hi Thomas - I think testing in opposite directions is a good idea. What is the biggest size of aggregate? Add stress to the spreadsheet so you have an estimate of breaking. Peter

Specific Beam Loading Case: Simply Supported: Center Load (efunda.com)

The biggest size is 4mm in the Silimix282...if this works out fine, i think i'll cast a couple more, but with some larger aggregates in...

I'm not sure if i can calculate anything that will tell me the breaking point of the EG?

[peteeng]

Hi Thomas - You will be able to calculate the stress in the beam at the applied load. From concrete data you will find a typical tensile stress of the material. Here's a grout with a flexural strength of 10MPa. So load to 5MPa.... Peter