deterioration

(engineering) Decline in the quality of equipment or structures over a period of time due to the chemical or physical action of the environment.

noun

1. Descent to a lower level or condition: atrophy, decadence, declension, declination, decline, degeneracy, degeneration. See better/worse.
2. A marked loss of strength or effectiveness: declination, decline, failure. See increase/decrease.
3. The condition of being decayed: breakdown, decay, decomposition, disintegration, putrefaction, putrescence, putridness, rot, rottenness, spoilage. See better/worse, thrive/fail/exist.

Definition: decay, degeneration
Antonyms: betterment, building, construction, development, improvement

Of concrete, the same as disintegration.