With our experience building precast concrete fences and walls in California, we've become pretty comfortable with a good understanding of the concrete and cement business. Generally "concrete" and "cement" are not the same thing. Sidewalks and foundations are made

Precast Concrete Walls Are A Good Option - by Menlo Lippowski
For decades, builders have been using precast concrete walls for commercial building projects. More recently, there has been a growing use of them for residential projects, and the results are excellent. Precast concrete walls create more than traditional poured concrete walls, and in far less time.