Polymer modified paving asphalt

Welcome to Fushun Research Institute of Petroleum and Petrochemicals,SINOPEC.

　　The development of road traffic calls for increasingly strict requirements for the anti-plastic deformation performance, anti-cracking performance and durability of roads. Adding polymers to paving asphalts has been proved to be a good solution. However, polymer and asphalt show big isolation inclination due to their different physical and chemical characteristics, which makes stable asphalt hot very difficult.
　　FRIPP has carried out extensive study and determined the technical plan for improving the storage stability of paving asphalt by adding stabilizers. Table 2 lists the main specifications of the commercial SBS modifies asphalts from 5 crude oils under proper processes. The data show that the asphalt products meet the JTJ036-98 standard.

Table 2 Properties of main products from modification process

Crude oil	Saudi Medium	Iran	Kuwait	Tahe	Suizhong 36-1
Product properties
Penetration（25℃，100g，5s），1/10mm	106	101	98	84	95
PI	1.062	0.002	1.03	1.590	-0.412
Ductility（5℃，5cm/min），cm	78	64	73	61	76
Softening point，℃	77	80	85	60	65
Kinematic viscosity（135℃），Pa.s	2.20	2.03	2.17	1.24	1.38
Flash point，℃	＞230	＞230	＞230	236	＞230
Solubility，%	＞99.9	＞99.9	＞99.9	99.95	99.97
Difference between separation and softening points，℃	-0.4	0.3	0.6	0.3	-0.5
Elasticity recovery（25℃），%	96.1	99.8	99.9	95.1	86.7
Aster-TFOT residue
Mass loss，%	0.03	-0.05	0.08	-0.28	0.01
Penetration ratio（25℃），%	75	76	71	77	81
Ductility（5℃），cm	50	50	65	28	47

　　In September 2001, WEPEC adopted FRIPP’s technology and produced the polymer-modified asphalt that meets the “Technical Requirements for Polymer Modified Paving Asphalt” and was successfully applied in the construction of Changchun-Fuyu section of Tong-San highway in 2002.