Bitumen

Bitumenpenetrationgrade60/70meansthepenetrationvalueisintherange60to70atstandardtestconditionswhichcommonly
usedasaPavingGrade.Bitumenisapplicablefortheproductionofhotmixasphaltforbasesandpavementsandforroad
construction.PenetrationGradeBitumensuppliedbyTavoilCompanyThisbitumenisproducedthroughaerationonvacuumbottom(the
rawmaterialusedformakingbitumenleftinvacuumdistillationcolumninoilrefineries)inbitumenproductionunits.Its
penetrationgrade(themeasureofbitumenhardness)isbetween60to70.Bitumenisspecifiedbythepenetrationandsoftening
pointtest.Designingisbypenetrationrangeonly.Thepenetrationgradebitumenhasathermoplasticpropertywhichcausesthe
materialtosoftenathightemperaturesandtohardenatlowertemperatures.Thisuniquetemperature-viscosityrelationshipis
importantwhendeterminingtheperformanceparameterssuchastheadhesion,rheology,durabilityandapplicationtemperaturesof
bitumen.

TheBitumenmodeisdependentontemperature.Thetemperature-vs-stiffnessrelationshipofbitumenisdependentonthetypeof
crudeoilanditsrefiningmethod.Bitumenpenetrationgrade60/70issemi-hardpenetrationgradebitumenusedasapavinggrade
bitumenwhichissuitableforroadconstructionandrepair.Itisalsousedfortheproductionofasphaltpavementswiththebelow
technicalspecification.Thisgradeofbitumenismainlyusedinthemanufacturingofhotmixasphaltforbasesandwearing
courses.Bitumen60/70isoneofthemostusedbitumengradesandit’sabasicmaterialforallotherbituminousproducts.
Penetrationdeterminesthehardnessofbitumenbymeasuringthedepthtowhichastandardloadedtheneedlewillvertically
penetratein5seconds,inasampleofbitumenmaintainedatatemperatureof25degreesCelsius.
BitumenPenetrationgrade60/70Applications
Bitumen60/70issuitableforroadconstructionandfortheasphaltpavementswithsuperiorproperties.Thistypeofbitumenused
inthemanufactureofhotmixasphaltforbasesandwearingcoursesandthemainusageofthisproductisusedintheroadinmild
regions.Thebitumenisprovidedduringthepressesofoxidationofvacuumbottominbitumenproductionunits.Duetoitsmedium
airblowingandpenetration,itisusedinmildareas.