There is what looks like a cement plant and the image you posted looks like an aggregate field for the cement production. Jane's Weekly was convinced 100% either that is was a new missile site, it is interesting to see the next images. I have a couple of other locations that I have spotted that could be missile/nuclear/military related that are in building phase. It is really hard to tell, need more images.
https://maps.google.com/maps?q=Islamic+Republic+of+Iran&hl=en&ll=35.713756,51.996872&spn=0.001768,0.003484&t=k&hnear=Iran&z=19
Helicopters or equipment?