Concrete-Cheap Concrete

A Cheap Concrete.

A kind of concrete made without cement is composed of 8 parts of sand, gravel and pebbles, 1 part of burnt and powdered common earth, 1 part of pulverized clinkers and cinders, and 1-1/2 parts of unslacked hydraulic lime.

These materials are thoroughly incorporated while dry into a homogeneous mixture, which is then wetted up and well beaten. The result of this is a hard and solid mass, which sets almost immediately, becoming exceedingly strong after a few days. It may be made still stronger by the addition of a small proportion--say 1 part--of cement.