C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
6/162
C09K 3/00 (2006.01) C04B 28/02 (2006.01) C08K 3/04 (2006.01) C08L 95/00 (2006.01) E01C 7/18 (2006.01)
Patent
CA 1049202
ABSTRACT OF THE DISCLOSURE A filler composition for asphalt cement comprises a pelleted mixture of carbon black having a BET-N2 surface area of at least about 40 m2/g and a dibutyl phthalate absorption value of at least about 60 c.c./100 g and an essentially non- volatile asphalt-solvating oil, when dispersed into 100 parts by weight of +30-20 sieve analysis Ottawa sand and 2 parts by weight of asphalt cement by hand stirring of the combined ingredients for from three to six minutes at a temperature of about 325°F, resulting in an improved asphalt composition having reduced pellet abrasion properties as determined by the Pellet Abrasion Test; cements containing the pellets may have a weight ratio of carbon black to oil in the pellets of 100 to 5 to 60 to 40; the cements can be employed in concrete compositions of improved toughness and improved stress/strain properties.
211384
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