The largest use of bitumen is for making asphalt concrete for road surfaces; this accounts for approximately 85% of the bitumen consumed in the United States.
ðə lˈɑːɹdʒɪst jˈuːs ʌv bɪtˈuːmɛn ɪz fɔːɹ mˌeɪkɪŋ ˈæsfɔlt kˈɑːŋkɹiːt fɔːɹ ɹˈoʊd sˈɜːfɪsᵻz; ðɪs ɐkˈaʊnts fɔːɹ ɐpɹˈɑːksɪmətli ˈeɪɾi fˈaɪv pɚsˈɛnt ʌvðə bɪtˈuːmɛn kənsˈuːmd ɪnðə juːnˈaɪɾᵻd stˈeɪts.