Polymer Modified Bitumen (PMB)

Polymer Modified Bitumen (PMB) is a superior form of bitumen that incorporates polymers like styrene-butadiene-styrene (SBS) or ethylene-propylene-diene monomer (EPDM) to significantly enhance its performance.

Benefits

• Improved Durability: Enhanced resistance to rutting, cracking, and fatigue, leading to longer pavement life.
• Enhanced Flexibility: Retains flexibility at lower temperatures, preventing cracking in cold climates.
• Improved High-Temperature Performance: Better resistance to softening and deformation in hot climates.
• Increased Fatigue Resistance: Withstands repeated traffic loads without significant deformation.
• Improved Resistance to Moisture: Better resistance to water damage, ensuring long-term pavement stability.

Applications

• High-Traffic Roads: Highways, expressways, and major arterial roads.
• Airport Runways: To withstand heavy aircraft loads and temperature variations.
• Bridge Decks: Ensures durability and resistance to fatigue.
• Pavements in Extreme Climates: Suitable for hot and cold regions.
• Overlay Construction: Used to rehabilitate existing pavements.

Technical Specifications

Property	Test Method	STYRELF PMB-40	STYRELF PMB-70	STYRELF PMB-40 Super
Penetration at 25°C, 0.1mm, 100gm/5Sec	IS 1203-1978	30-50	50-80	30-50
Softening Point, (R & B), °C, Min	IS 1205-1978	60*	55	70
FRAASS breaking point, °C, Max	IS 9381-1979	-12	-16	-12
Flash Point, COC, °C, Min	IS 1209-1978	220	220	220
Elastic Recovery of half thread in ductilometer 15°C, %, Min	IRC: SP: 53-2010 ANNEX-2	60	60	70
Complex Modulus (G*/Sin δ) as Min. 1.0 kPa at 10 rad/s, at a temperature °C	IRC: SP: 53-2010 ANNEX-1	76	70	76
Separation, difference in Softening point (R & B), °C, Max	IRC SP 53-2010 ANNEX-3	3	3	3
Viscosity at 150°C, Poises	IS 1206 Part 1	5-9	3-6	5-9
Thin film oven tests on residue:
Loss in Mass, %, Max	IS 9382-1979	1.0	1.0	1.0
Increase in Softening point, °C, Max	IS 1205-1978	5	6	5
Reduction in penetration of residue, at 25 °C, %, Max	IS 1203-1978	35	35	35
Elastic Recovery of half thread in ductilometer 25 °C, %, Min OR Complex Modulus (G*/Sin δ) as Min. 2.2 kPa at 10 rad/s, at a temperature °C	IRC: SP: 53-2010 ANNEX-4 OR IRC: SP: 53-2010 ANNEX-1	50	50	50