Need help with my hair health due to construction site work.

After years of searching, I’ve finally found a job, and it’s at a construction site. However, the dust, cement particles, and constant exposure to the sun are taking a toll on my hair. Can anyone suggest ways to take better care of it?

I have to bathe twice a day because of the sweat and dust, once in the evening after work and again in the morning. I apply coconut oil in the morning before bathing, but by noon, my hair becomes very dry, brittle, and starts breaking.

So any tips or suggestions?