prime and tack coat together?

[yashrai041]

Dear all,

do we need to apply tack coat after applying prime coat.In what case the prime coat only or tack coat only is used? Or in what case we use prime or prime coat together.please help.

thanks in advance.

 

[gegk]

As i know and we are using in my country, prime coat only on crushed stone base and tack coat in previous asphalt layers. Together i never use it.
I hope that help's my answer

 

[Ron]

Depends on the time between prime and placement of asphalt. If more than a few days, put tack coat on.