Central Concrete Products, Inc. is Mid-Michigan’s premier ready mixed concrete supplier, with two plant locations in Mt. Pleasant and Alma, Michigan. Both plants are National Ready Mixed Concrete Association (NRMCA) State Certified and are fully-equipped with the latest technology in automatic batching. With a large fleet of front discharge mixers, we have the equipment necessary to supply concrete for both larger commercial projects, and the everyday sidewalk or driveway. Products & Services.