concrete

IPA: kʌnkrˈit

(countable, uncountable) A building material created by mixing cement, water, and aggregate such as gravel and sand.
(logic) A term designating both a quality and the subject in which it exists; a concrete term.
(US) A dessert of frozen custard with various toppings.
(perfumery) An extract of herbal materials that has a semi-solid consistency, especially when such materials are partly aromatic.
(possibly obsolete) Sugar boiled down from cane juice to a solid mass.
(obsolete) Any solid mass formed by the coalescence of separate particle; a compound substance, a concretion.

(usually transitive) To cover with or encase in concrete (building material).
(usually transitive) To solidify: to change from being abstract to being concrete (actual, real).
(intransitive, archaic) To unite or coalesce into a solid mass.

Real, actual, tangible.
Being or applying to actual things, rather than abstract qualities or categories.
Particular, specific, rather than general.
(not comparable) Made of concrete (building material).
(obsolete) Made up of separate parts; composite.
(obsolete) Not liquid or fluid; solid.

Examples of "concrete" in Sentences

The concrete emboldened the woods.
The concrete is placed in the mold.
The bridge is of concrete in the design.
The lower unit is of monolithic concrete construction.
The road was resurfaced in concrete with a tactile finish.
Several types of trowel are used in concrete construction.
The new tipple was built more durably of concrete and steel.
The concrete and steel canyons of the city rise to dizzying heights.
I agree the the particulates may be mostly from concrete and 'road dirt.'
Communications inside steel and concrete buildings are also a serious shortcoming.