Blue Star Ready Mix Kit HO Scale

Walthers Cornerstone Blue Star Ready Mix Kit - 7-3/4 x 8-1/8 x 11-3/4" 19.3 x 20.3 x 29.3cm / HO ScaleWalthers Cornerstone #: 933-3086 Chances are your concrete basement or layout room started out at a plant just like this! Concrete is one of the oldest building materials, dating back to 500 BC. Today, it is the most frequently used construction material, combining low-cost, durability and strength with extreme versatility. It can be molded to almost any shape so it's used to build everything from roads and buildings, to birdbaths and railroad ties! Although concrete used to be mixed at the job site, modern projects require a consistent mixture that's more easily made at a ready mix plant. Both fine (sand, gravel, small pebbles) and coarse (blast furnace slag) aggregates arrive by rail, along with powdered portland cement. These ingredients are then mixed with water and air to create concrete that meets each customers specifications. When ready, the material is loaded in mixer truck