Assertion: stone matrix asphalt | /r/AtLocation | the u.s.
Facets:
value: in 1990
type: TEMPORAL
Source sentences:
text: There is no fineness standard for mineral filler beyond the AASHTO M 17 gradation requirements; however, when Stone Matrix Asphalt (SMA) was first introduced to the U.S. in 1990, often a requirement for a maximum percent passing the 20 µm (No. 635) sieve was specified.