Ghost City (Cement) Concrete is our product for the sidewalk on your layouts.
More grayish color 1290 Concrete Paving Powder
Genuine for the Scenery Craftsman
Manufactured by Arizona Rock and Mineral Company in Paulden, Arizona
The product is for model Railroad Ballasting on and around the railroad tracks or around the model railroad layout or other scale models.
In the United States and Canada, the most common type of sidewalk. Examples of which from as early as the 1860s can be found in good repair in San Francisco. When quantities of Portland cement principal use is in the construction of sidewalks.
Today, most sidewalk ribbons are constructed with cross-lying strain-relief grooves.
In highly variable climates which undergo multiple freeze-thaw cycles, the concrete blocks will be separated by expansion joints to allow for thermal expansion without breakage. The use of expansion joints in sidewalks may not be necessary, as the concrete will shrink while setting.
Another major benefit is that pervious concrete can be used, which eliminates the need to place storm drains near the road, and reducing the need for the slightly sloped roadway to help rainwater to run off. No longer requiring discarding rainwater through use of drains also means that less electricity is needed (more pumping is otherwise needed in the water-distribution system), and no rainwater gets polluted as it no longer mixes with polluted water. Rather, it is immediately absorbed by the ground.
Although the terms cement and concrete often are used interchangeably, cement is actually an ingredient of concrete. Concrete is basically a mixture of aggregates and paste. The aggregates are sand and gravel or crushed stone; the paste is water and portland cement.