Sharp sand also known as ‘grit sand’ or ‘concrete sand’, washed sharp sand is more coarse and has larger particles than other construction sands such as builder’s sand, which consists of finer grains. Typically, sharp sand is used within applications where more strength and less flexibility are required. For example, it is ideal for mixing concrete and is commonly used for floor screeds and laying paving courses. In addition to construction projects, sharp sand can also be used as a top dressing for lawns, in general landscaping, and in seed composts, because it enables moisture movement.
Here are 5 common uses of sharp sand in building construction:
1. Foundation layer for patios and landscaping: Most grains of the sharp sand is angular, which creates a suitable interlock between the grains. The way the grains interlock provides strength in any application, like when mixing with concrete. Also, when laying a base for paving, this kind of sand is very useful as it is strong and reliable.
2. Reduces the amount of retained water: sharp sand has large grains that reduce its retention capacity of water. Water drains freely in sharp sand, making it one of the best to use when building drainage. Also, it is the best to use when building pavement or constructing a landscape because of the ability to drain water fast.
3. Drains freely: sharp sand drains freely, making it an ideal aggregate for using on lawns and in landscaping. The large grain size, low silt, and clay content make sharp sand a free-draining material.
4. Reduces the amount of retained water: The larger grain size of sharp sand reduces the amount of retained water, making it very free draining. Excellent drainage properties make sharp sand ideal for using as a foundation layer for paving and patios or in landscaping.
5. Low silt and clay content: Sharp sand contains less silt and clay content in its composition. That is why it is best to use it as a pavement construction material. Because of the low silt and clay content, it becomes hard to erode the paving slabs. Also, the low silt content makes sharp soil the best for mixing with concrete.