The mechanical properties, given by bitumen make an ideal waterproofing contribution to roof constructions, as well as to their ability to withstand significant structural movements. Bitumen is known as a material, which retains properties over long periods, so it significantly contributes to a structure's durability and longevity.
Roofing oil asphalt is used in production of roofing materials. It is produced at Bitumen Unit vie continuous oxidation of black-oil vacuum distillation bottoms with atmospheric oxygen.
MAIN TECHNICAL PARAMETERS | ||
DESCRIPTION | TYPES | |
GOST 9548-74 | ||
BNK 40/180 | BNK 45/190 | |
Needle penetration depth at 25°C, 0,1 mm | 160-210 | 160-220 |
Melting point, °C | 37-44 | 40-50 |
Solubility in benzene and chloroform, % min. | 99,50 | 99,50 |
Weight alteration after heating, % max. | 0,80 | 0,80 |
Needle penetration depth at 25°C in residue after heating, % of initial value, min. | 60 | 60 |