Does concrete count as a metamorphic rock?

No. True that concrete is a mixture of various substances (rocks, pebbles, etc). And also true that rocks are also mixtures (of minerals). But concrete is not formed deep in the earth's crust under great pressure and heat over long periods of time like metamorphic rocks are. read more

Concrete is neither; it is a mixture of cement (which is made of various ingredients including limestone, gypsum and ash) and aggregates (stones and sand), set with water. read more

Budownictwo 19 Theophilus Yisa Tsado A COMPARATIVE ANALYSIS OF CONCRETE STRENGTH USING IGNEOUS, SEDIMENTARY AND METAMORPHIC ROCKS (CRUSHED GRANITE, LIMESTONE AND MARBLE STONE) AS COARSE AGGREGATE Introduction Concrete is regarded as the most widely used man-made material in the world, second only to water as the world's most utilized substance [1-4]. read more

Now, the process of formation of concrete is the same as that of formation of a Sedimentary Rock, but still it is not supposed to be considered as a sedimentary rock because it is formed by artificial processes. read more