Technology for development of lignin additive modified bitumen binder

Viktors Haritonovs, Artūrs Riekstiņš, Rita Bērziņa, Aina Bernava, Remo Merijs-Meri

Description of the Technology

The laboratory technology for development of lignin additive substituted bituminous binder was developed. The technology was based on following:

• Preheating of bitumen up to 140^oC;
• Transfer of bitumen to oil bath pre-heated to ca 130 – 165^oC;
• Gradual introduction of lignin additive in the heated bitumen during 1 h at high-shear (3000-8000 rpm, depending on the chosen bitumen) while ensuring that mixing temperature is maintained at ca 160^oC. 

By using this technological approach substitution degree of up to 60 wt.% was achieved for the first time.

Applications

The developed technology was used for obtaining modified bitumen up to the maximum substitution degree of 60 %. The technology can be used for obtaining lignin additive modified bitumen binders with improved rut resistance, adhesion to aggregate and anti-oxidant stability

Advantages

By using this technological approach substitution degree of up to 60 wt.% was achieved for the first time.

 

Keywords

Technology for development of lignin additive modified bitumen binder