This sounds like concrete burn. The Center to Protect Workers' Rights has excellent material on prevention and treatment of cement burns. You can call 301-578-8500 or visit their Web site, www.cpwr.com. (Follow the link to eLCOSH, then pick Hazard, Chemical, and Cement.)
The most important thing in the short term is for your husband to never allow any cement or concrete to come into contact with his skin. It sounds like he has become "sensitized," which means he will get a reaction whenever his skin comes into contact with cement. He must wear gloves, long sleeves, wash frequently, etc. This is a workers' compensation issue and medical treatment should be paid for by his employer.