Dear Rudra,

the weathering effects on "sandstone"  depends on the chemical and physical properties of the sandstones and the climatic conditions of the environment. Even micro- and nanoclimatic influences, due to the orientation in respect of  the main weather direction and the exposition on the building creates large differences.

Furthermore, degradation of stone is not a linear but a exponential process due to the exponential increasing inner reaction surface.

Please send some more detailed informations about chemical and physical properties of these sandstones, the climatic conditions, etc..........

Maybe then it will be possible to give you an more detailed answer....

Best regards

Andreas

Rudra,

by seismic effects, do you mean velocity measurements? Weathering effects usually manifest as iron oxide or clay rims - depending on the environment, climate, and availability of the depositing material. In cases of frost (which I assume is less likely in your case?), microfracturing might not be effective. Are you trying to match the seismic results?

Manika

Hi Rudra,

Sandstone is combination of the quartz grains cemented together. If the cementing material is calcite and the environment is acidic, the weathering effect may be significant (acid reacts with calcite). The growing lichens on the surface and the saline environment may also pose threat to the sand stone monument. 

Deb