Dirt on the construction ...
It can't be helped in the process, but ...
Attached before delivery,
Cleans rust stains on the newly installed concrete surface.
This time, both ends of the box culvert + the backfill mark of H steel are the main.
Before construction
There is rust stain on the whole. Also, the traces of filling H steel will be processed in the meantime.
Roughly polishing and remove the dark rust stains using " Flat polishing grindstone # 36 " .
Use "Repair Resin # 45" to crush pin holes in areas where the substrate is bad.
After that, spray "C Repair Color " 3 to 4 times on the whole,
pattern with Tone Color and add joint lines to complete.
It was finished beautifully without any discomfort.
I am glad that everyone was very pleased and did my best in the hot weather.