C6 100 ton 2970 cubic foot ACF covered hopper car for cement service, Light Gray.

HO scale, RTR with trucks and magnetic couplers. Cement is a binder that sets, hardens, and adheres to other materials to bind them together. The most common type, Portland cement, is made by roasting limestone, with other materials such as clay, to 2,640 degrees Fahrenheit in a kiln to form calcium silicates. Clinker from the kiln, plus a small amount of gypsum, is ground into a powder to make ordinary Portland cement, which is used to make concrete, mortar, and grout. Portland cement is very dense, weighing 85 pounds per cubic foot. The first rail car specifically designed to transport the moisture sensitive commodities Portland cement and rock salt in bulk was the all-steel covered hopper car with a fixed roof with loading hatches. The first newly built railroad fleet was the Pennsylvania’s H30 design of 1935, a 70-ton car of 1973 cubic feet. In 1937 ACF introduced its 1958 cubic feet, nominal 70-ton capacity, design that would dominate the cement car market until the introduction o