unit weight of sand used in strip foundations is 1700kg per cubic meter
strip foundation is love
A strip foundation is best known as the lowest part of your structure. The strip foundation is the first piece of supporting layer that is used with a foundation.
20mm
Strip foundations are used to support a line of loads, either due to a load-bearing wall, or if a line of columns need supporting where column positions are so close that individual pad foundation would be inappropriate.
its commonly used in made-up ground.
A reinforced wide strip concrete foundation is used if the soil is soft or is of a low bearing capacity. This would not work for heavy or clumpy soil.
sand replacement method is used for determining the dry density of soil
A stepped strip foundation is often used on a sloping site where the steps allow the foundation to follow the slope without too much excavation, when compared with excavations and retaining walls. A floor structure that spans between perimeter strip foundations , whether over intermediate piles or not, also minimises excavation, when compared with a slab on grade or slab on fill floor.
Narrow strip or Deep strip footingThis type foundation is used for normal soil and normal loads which just need 0.9m dept cheep in cost construction.The essential feature of the narrow strip foundation is that the trench is too narrow to be dug by labours working in trench. It depends for its success in the ability of a mechanical excavator, such as a light tractor-mounted back-actor with a narrow bucket to dig the trench, which must be self-support until it can be backfill with concrete.It can't be economical be use in very soft clays or water bearing sand which support by close timbering.From Lewis Telfer
Narrow strip or Deep strip footingThis type foundation is used for normal soil and normal loads which just need 0.9m dept cheep in cost construction.The essential feature of the narrow strip foundation is that the trench is too narrow to be dug by labours working in trench. It depends for its success in the ability of a mechanical excavator, such as a light tractor-mounted back-actor with a narrow bucket to dig the trench, which must be self-support until it can be backfill with concrete.It can't be economical be use in very soft clays or water bearing sand which support by close timbering.From Lewis Telfer
The density of stabilized sand can vary depending on the materials and process used for stabilization. Generally, stabilized sand has a density range of 100-150 pounds per cubic foot (1600-2400 kg/m³) depending on the type of stabilizing agent and the compaction method used.
Density. Gold has an extremely high density relative to the rest of the sand in the pan and will therefore fall to the bottom as one swirls the pan around. The water is there to provide a means by which to circulate the dirt mixture and eliminate the "sand" (the sand gets suspended in the water and spills over the sides of the pan as it is swirled). And that's pretty much panning for gold.