Using Polymer Modified Asphalt Emulsions in Surface Treatments A ...

Polymer modified asphalt emulsions used for microsurfacing are further specified to
meet the requirements of AASHTO M 208 as well as the following:
• Residue by distillation: 62% minimum;
• Softening point: 57º C. minimum;
• Penetration at 25º C.: 40-90.
Current Federal Lands Highway (FLH) specifications direct that polymer additives are to
be blended either into the asphalt directly or the emulsifier prior to emulsification.
Table 5: Summary of M 208/140 Specifications
Emulsion
Type
Viscosity,
Saybolt
at 22º C †
Viscosity,
Saybolt
at 50º C †
Demuls †
Min. Residue
by
Distillation †
Penetration
at 25º C ‡
Ductility
at 25º C ‡
(cm)
Anionic Emulsions and Residues (M 140-86)
RS-1 20 - 100 -- 60 55% 100 - 200 40
RS-2 -- 75 - 400 60 63% 100 - 200 40
MS-1 20 - 100 -- -- 55% 100 - 200 40
MS-2 100 -- -- 65% 100 - 200 40
MS-2h 100 -- -- 65% 40 - 90 40
HFMS-1 20 - 100 -- -- 55% 100 - 200 40
HFMS-2 100 -- -- 65% 100 - 200 40
HFMS-2h 100 -- -- 65% 40 - 90 40
HFMS-2s 50 -- -- 65% 200 40
SS-1 20 - 100 -- -- 57% 100 - 200 40
SS-1h 20 - 100 -- -- 57% 40 - 90 40
Cationic Emulsions and Residues (M 208-86)
CRS-1 -- 20 -100 40 60% 100 -250 40
CRS-2 -- 100 - 400 40 65% 100 - 250 40
CMS-2 -- 50 - 450 -- 65% 100 - 250 40
CMS-2h -- 50 - 450 -- 65% 40 - 90 40
CSS-1 20 - 100 -- -- 57% 100 - 250 40
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