We have been trying to run simulations on various loading conditions and material properties to investigate crack formation in 2D sections. While we are busy with sample analyses and running simulations, here is a taster (if you may call it a result) video of how cracks grow under expanding aggregates. This simulation is based on a real test specimen (Upside down though).
Simulations continue till the specimen fails (or reaches a predefined stain level). You may realise some simplification on the section identification. Here are how the original sections look like. These specimens have been kept in 60°C reactor (RH 100%) for 20 weeks before sample preparation process.
1- Normal Light Image
2- UV Light Image
Specimens are based on original mix design of Nautesund Bridge. you can find more information about this testing campaign here.
I have also done damage rating index analyses on this (and various other) specimens based on method defined by Grattan-bellew (1992). Some results regarding These analysis are as follows:
Damage rating index - calculated based on Grattan Bellew (1992)
Distribution of Crack types observed on our samples
DRI analyses and simulations are continuing in full speed. Soon I will provide more data (and definitely more results) on our blog.
Busy months ahead..
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