Housekeeping is a concern at every concrete plant. Aside from the constant dust and grime, concrete that has set on equipment can be very difficult to remove. Here are some ideas from plants that have found products to help wage the war on cleaning concrete equipment. Gas-powered machines with rotating brushes have brought some relief to cleaning double-tee and piling forms for Precast Systems Inc., Lakewood, N.J. Southwest Ready Mix in Tualatin, Ore., keeps its trucks clean by using an acid-based cleaner that includes rust inhibitors.