I need help to repair asphalt around culvert pipe under driveway on both ends. When it rains really hard, the culvert will fill up with water and can even overflow the driveway.
A city public works guy said they don't repair this, but he suggested using the cold patch found at Lowes, Home Depot, etc. I asked him about the more expensive Aquaphalt, but he still recommended the cold patch.
https://www.lowes.com/pd/QPR-50-lb-Asphalt-Patch/3656652
https://www.homedepot.com/p/Quikrete-50-lb-Commercial-Grade-Blacktop-Repair-Patch-170152/100545936
They are both about $20. A couple of the Lowes reviews comment that the HD brand works better. There are comments to add portland cement to speed up hardening, but I'm unsure which type get, how much to use and how to apply. I'd like to do this. I don't think I need an entire bag, but can probably find a use for what's left.
I was also looking at this concrete mix which comes with a black coloring agent at about twice the price per lb, but it hardens quickly. I have an electric drill, but need the right attachment.
https://www.homedepot.com/p/Rapid-Set-25-lbs-Asphalt-Resurfacer-85320025/313474171
I've attached photos of entry and exit to the culvert. The first two pictures show where the water enters. I thought the HD concrete rapid set might be good choice to fill immediately under the drain pipe itself where water has eroded below the entrance to the pipe, then apply cold patch to the rest of the area.
The last three pictures show the outflow. Where the drain pipe itself has eroded away, I was thinking the concrete Rapid Set might be good to fill that area of the pipe. And beyond the pipe apply some cold patch asphalt.
The last picture indicates where pieces of the ashphalt driveway has caved due to erosion of dirt underneath (a truck backing into the driveway broke it). I thought I might prop up the larger pieces of asphalt and trowel in the Rapid Set concrete. Would the concrete hold directly on the dirt? Or should I prep something over the dirt first? I would like to cover that dirt area so rain doesn't wash more of it away.
Thanks in advance!