Learn how to lay paving slabs . For example: In order to avoid the movement of the bricks during the construction process, sand cannot be added to the joints of the bricks after the laying of the road bricks. After a short period of laying, fine sand should be sprinkled into the joints of the road bricks This is called "Yangsha Positioning". And different methods should be used when laying paving slabs in different conditions. The following describes the laying method under three conditions.
1. Flexible laying on the flexible foundation:
Lay 25-50mm of sand on the subgrade that is flat, compact, and more than 90% dense, and lay paving slabs on the flat sand. The seams between bricks are filled with fine yarn.
2. Flexible laying on semi-rigid foundation:
After mixing the cement: sand = 1: 7, it will be spread on the flat and compacted roadbed with a thickness of 30-50mm. Then, paving the road with bricks and filling the seams with fine yarn. Finally, water is sprinkled on the brick surface, and the water penetrates the cushion layer through the cracks of the brick, so that the binding force with the cushion layer can be effectively enhanced.
3. Flexible laying on rigid foundation:
Fundamental: It is necessary to level, compact, and achieve a density of more than 90%. Cement security layer: 300mm thick, the composition is as follows: cushion: thickness 30mm; cement: sand = 1: 2; dry temperature: looks loose, can be clumped in the hand; paving tiles: Paving blocks are laid out in a planned arrangement.