interlocking concrete pavers is a new type of pavement produced by concrete pavers making machine . It was introduced to China in the mid-1980s. Due to its unique superiority, it has been applied in the yard construction of many docks in China. Great social and economic effects
The so-called interlocking block pavement is that the surface layer is closely arranged by high-precision cement concrete precast blocks according to a specific method, and the block body is indirectly sewed with sand to fill the pavement. Under the external load, the block is not alone under the force. Instead, the loads are spread out interlockingly.
Interlocking block layer, mat sand layer, base layer and subgrade.
1. The interlocking block layer is the layer of the interlocking block pavement which distinguishes other pavement structures. It not only acts as a wear layer, but also functions as a structural layer (integral diffusion load), and the block body can be made into different shapes to spell out various pattern beautification environments.
2. The role of the sand layer is to level the base layer and provide the necessary conditions for the surface layer to form a tight interlock.
3. The base and roadbed are almost indistinguishable from the general asphalt pavement.
4. Edge constraint is a must, which acts to limit the lateral displacement of the block under the action of the carriage to ensure the interlock between the blocks.
Regarding the study of interlocking block pavements, Germany, the United Kingdom, Australia, South Africa, the Netherlands, Japan and other countries have conducted different types of tests to clarify the characteristics of interlocking block pavements. Their general conclusions are as follows:
1. The blocks are not individually capable of withstanding the capacity of the load.
2. Most researchers believe that the shape of the block has an impact on the performance of the road: the interlocking performance of the shaped block is usually better than that of the rectangular block, and the performance of the block with four sides is better than that of the two sides.
3. The interlocking block pavement can withstand large deformations without damage.
4. Compared with the asphalt pavement, the interlocking block pavement rebounds more heavily.
5. The damage of the interlocking block pavement is usually not due to the fracture of the block, but because the block is punched into the base layer, and the excessive road surface permanent deformation accumulation (rut)
6. The interlocking block pavement has good anti-sliding properties.
A large number of experiments have promoted the successful application and transformation of interlocking block pavements. The shape of concrete blocks has evolved from imitation bricks to refined toothed rectangular blocks, and has evolved into today's comprehensively reformed shaped blocks. Continuously improve and improve the system performance of interlocking paving.
At present, the most advanced interlocking floor tiles are “cross-wave” paving tiles.
