I agree with last posts.
You described my husband to a tee! He was a concrete man for about 20 years. It IS a hassle to put all the protective gear on, but its there for a reason. Tell your husband, that had my husband used a little bit more common sense & protected himself over the years... it would have saved him YEARS of health problems & thousands of dollars in medical bills. Its hard watching your spouse deteriorate over the years, but its so maddening when you know they could have done something about it! You can also mention to him that these materials don't just cause skin reactions, they will affect his brain & mental functions. No job is worth any of that. I'm glad you posted the question!
He really needs to wear protective gear. Some of the components of cement are caustic (will burn your skin). Continuous chemical burns of this nature put him at risk for skin cancer. Some chemicals may also be absorbed through the skin, causing long term health problems. You can imagine that inhaling the same chemicals can only be worse. He should probably see a Medical Toxicologist. They can check his blood and hair for the toxic effects of his work. Please push him to protect his body.
My uncle did concrete work for years, the lime in concrete is horrible on the skin. He used to have the burns as well. Try to get him to wear long sleves at least & definately a mask!
Good Luck