Bread bricks have different names in different places. In fact, he is also regarded as Dutch bricks. Road pavers have been developed abroad, but in China, such machinery and equipment have not been introduced.
There is also manual laying. Because different people have different habits, there will be some differences when laying. So how to lay bread bricks? The editor of Guangzhou Wanxin Pipe Industry Co., Ltd. introduces the following:
Subgrade excavation: according to the design requirements, the roadbed is excavated, the earthwork is arranged, and the design elevation is reached; check the longitudinal slope, transverse slope and sidelines,
Whether it meets the design requirements; repair the roadbed, level and compaction, and the compaction coefficient is above 95%.
Cushioning: 120mm thick 3: 7 lime soil layer, large and medium-sized vehicle lanes, 200mm thick 3: 7 lime soil layer, and leveling compaction, compactness, more than 95%.
Grass-roots paving: 120mm thick 3: 7 lime soil or 100mm thick sand and gravel are laid on the sidewalks and garden roads, and leveled and compacted, and the compactness is above 95%.
Small-scale automobile lanes should be laid with a 150mm thick inorganic binder to stabilize the granular cushion (or 150mm thick graded sand and gravel, the maximum particle size should not exceed 60mm,
The minimum particle size should not exceed 0.5mm),
Large and medium-sized driving lanes should be laid with a 300mm thick inorganic binder to stabilize the granular cushion, and leveled and compacted, with a compactness of more than 95%.
Laying of the screed layer: The screed layer is made of medium sand, 30mm thick. The medium sand requires a certain gradation.
That is, the gradation sand with a particle size of 0.3-5mm is leveled.
Surface layer paving: The surface layer is pavement tiles. When laying, the pavement tiles should be laid according to the design drawings.
When laying, it should be laid flat and beat with a rubber hammer.
, But the corners of the bricks must not be damaged, and the quality requirements conform to the regulations for construction and inspection of interlocking pavement pavement CJJ79-98, sidewalks
The minimum thickness of square pavement tiles is 40mm, and the minimum thickness of road tiles for small cars is 60mm.
Requirements for jointing sand: The quality of jointing sand should meet the requirements of CJJ79-98.