Production

concrete pavement brick is widely used in sidewalks, squares, gardens and other public places, concrete pavement brick is a good pavement material. However, if you do not pay attention to raw materials, concrete ratio, production process in the production process, it is easy to affect the strength of the brick, service life, water absorption, frost resistance and other major quality and technical indicators, resulting in the quality of road bricks, affecting the actual engineering application. Therefore, the production quality control of pavement bricks should pay attention to the following points:

1. Production process control

The following principles shall be grasped for pavement brick forming:

1) Due to the different mixing density of the raw materials used, it is appropriate to use a low water-cement ratio pressure vibration molding process to make the product uniform and dense. The principle of compaction is to measure the weight of wet bricks. The heavier the brick, the more dense it is.

2) Control of water-cement ratio: the surface layer shall be based on the principle of micro-cement slurry, but not sticking to the upper pressure mold; The bottom layer shall be based on the principle of cement slurry on the side but not bulging.

3) color control: distance brick 1.5 m no color difference principle.

4) thickness: brick thickness control in 58~60mm, surface thickness of more than 8mm.

2. Strictly control molding and size deviation

strictly control the stirring sequence, stirring time. During the molding process, to prevent concrete layering, floating, caking and segregation, in order to ensure the strength and appearance size of pavement bricks, two sets of standard molds are selected, one set of molds is used until the size deviation reaches 0.5mm, and then the other set is replaced until the size deviation reaches 0.5mm; Two sets of molds are regularly rotated.

3. Low temperature curing

The strength and decoration of concrete pavement bricks are subject to the curing conditions, and the curing method must be selected according to local conditions. In order to facilitate the hydration of cement, to the maintenance of the kiln temperature does not exceed 45 ℃, to the kiln temperature close to 40~50 ℃ for the principle. At the same time, in order to ensure the decoration of concrete pavement bricks, low temperature curing or natural curing in curing kiln should be adopted, and water should not be applied as often as wall bricks.

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