Defferennt between 80/100 and 85/100 penetration grade bitumen
Defferennt between 80/100 and 85/100 penetration grade bitumen
(OP)
I'm currently supervising a road to be finished with a double surface dressing.The Contractor is now out of 80/100 penetration grade bitumen.He has requested from the Engineer to order 85/100 penetration grade bitumen as the previous supplier has run out of 80/100 penetration grade.Is there any detrimental effect to the work to allow the Contractor to purchase 85/100 instead of 80/100 penetration grade bitumen?Please assist.





RE: Defferennt between 80/100 and 85/100 penetration grade bitumen
1. The 85 penetration sounds like maybe an 80 penetration that didn't meet spec. Producers usually don't go in 5 penetration increments.
2. That's a pretty soft asphalt to start. To soften it even more will cause it to be tacky longer and will require a longer time before it weathers to a stiffer consistency to retain the aggregate.
RE: Defferennt between 80/100 and 85/100 penetration grade bitumen
RE: Defferennt between 80/100 and 85/100 penetration grade bitumen
Not familiar with SE Asia requirements, but as noted, the 85 would be within tolerance if defg is in SE Asia (and actually be within tolerance if in US, though the 80 would not.
I can't imagine he would be using that in a hot climate, though. Here in the SE USA, that asphalt would flow into the next county.
RE: Defferennt between 80/100 and 85/100 penetration grade bitumen
Thanks you for the post.The geographic location of the project is Africa(Tanzania).The project road is located in a moderate climatic zone.The bitumen materials(85/100)is expected to be brought from Saudi Arabia or Iran.
RE: Defferennt between 80/100 and 85/100 penetration grade bitumen