There are two forms of electricity: AC - alternating current, and DC - direct current. AC is used to transmit electricity of very large distances. The reason is because there is very little heat loss (in comparison) to DC over large distances and a lot less energy waste. AC is the type of...
The various back filling materials away from the granular soils are; 1. Coarse and fine aggregates. 2.Boulders/ Soling stones. 3. Saw dust(Wooden). 4. Cement:Lime: Sand-1:1:20 mix. 5. Lean concrete . If there is any other materials may pl. be posted. Regarding the back fill with Saw dust there...
Initially I wanted a rural/rustic look and decided a gravel and stone dust mix would accomplish this goal. I hired a road guy to build me a gravel-stone dust winding road approximately 320 feet long. At installation it looked great. The first problem was the gravel seemed to creep in to the lawn...
Retaining walls are built in order to hold back ground which would otherwise move downwards. Their purpose is to stabilise slopes and provide useful areas at different elevations, e.g. terraces for agriculture, buildings, roads and railways.