On paving roads, there are many paving slabs . It has a strong bearing capacity and is non-slip. It is safe to walk on it. The cushion sand is one of its components.
1. The cushion sand of paving slabs should be washed coarse sand. The cushion sand of paving slabs must have a good water permeability function to ensure that the permeated water can penetrate the water-permeable base layer in a timely and effective manner.
2. The paving sand of the paving slab should be semi-dry sand, and the mixture will be squeezed by hand. After being loosened, it will be qualified. The wet and dry pad sand will help to smooth the paving surface, reduce dust and progress. The compactness of the cushion.
Laying paving slabs is a large project. Before use, it is okay. Its cushion sand improves the water permeability of the bricks and is also conducive to the laying of the bricks. During the laying process, this part should be paid attention to.