It is if one does not count the heavy hydrocarbons taken from raw crude and used to make asphalt in the maths of carbon pulled out of the Earth originally when the oil is pumped out - in other words, if one blames the lighter stuff used in fuel for the actual oil extraction and then just goes with “well, now that we have this stuff out, might as well use the heavy stuff for asphalt”.
Otherwise its adds up to a carbon source because even though the fraction of crude oil that ends up used for asphalt has it’s extraction from underground sources offset by that stuff ending up back on the ground as asphalt, the various processes between it coming out of the ground and it ending back on the ground do emit CO2 and some light hydrocarbons.
Sure, nowhere as bad as fuel and gas, but still a net negative.
Asphalt is definitely a carbon sink though since it’s a petroleum product!
It is if one does not count the heavy hydrocarbons taken from raw crude and used to make asphalt in the maths of carbon pulled out of the Earth originally when the oil is pumped out - in other words, if one blames the lighter stuff used in fuel for the actual oil extraction and then just goes with “well, now that we have this stuff out, might as well use the heavy stuff for asphalt”.
Otherwise its adds up to a carbon source because even though the fraction of crude oil that ends up used for asphalt has it’s extraction from underground sources offset by that stuff ending up back on the ground as asphalt, the various processes between it coming out of the ground and it ending back on the ground do emit CO2 and some light hydrocarbons.
Sure, nowhere as bad as fuel and gas, but still a net negative.