A friend of mine from down south sent me a link to an interesting article in regards to the sand used in desert landscaping. It’s interesting that as the world’s population continues to grow, we seem to be desensitized to the use of “green” resources and do not put as much thought into how we use what we have. I found the following to be interesting. The sand used in desert landscaping is generally not treated or recycled. In most cases, the sand used is simply thrown away. Check this page.
So, why is desert sand not used for construction? Sand is not an environmentally friendly product. It is difficult to reuse sand and the processes involved adding processing costs to the total cost of building a structure. Sand also does not add any real value to the structure. As the writer points out, the “builders” of these large structures could just as easily have taken the sand and used it themselves. They would still have gotten a structure, but it would have cost them very little in the way of materials and labor to do it themselves, and there are far more efficient ways to make things in the desert today.
Apparently, the big “builders” of the world simply chose to ignore all of this when constructing their huge structures. It takes a lot more manpower and material to build a sandstone wall than it does to make bricks or concrete. Why? Because sand is easily imprinted with the correct shape and density to make the right type of structure, and engineers have measured this many times, and simply apply the necessary adjustments when building.