The definition of petrography is the branch of science concerned with the description of rocks especially by microscopic study. At Concrete Science, use petrography as a baseline for examining the concrete or construction material and/or the sand and gravel.
Different material that we look at, but not limited to, are:
Concrete Stucco
Mortar/Grout Aggregates(coarse and fine particles)
Toppings/overlays/underlayments (paint, gypsum, plaster, epoxy, etc.)
Fire damaged construction material
Asphalt