Paving Brick The Essentials Of Layout
The key points of the layout of paving bricks
Paving brick is the natural rock soil, from all parts of the country, different color and color of the rock and the modern process is to burn into different colored rock clay bricks. In the construction of the control line may highlight the beauty of the product, below we will introduce the main points of the layout.
1, spring line from the center line to the both sides, as far as possible in accordance with brick modulus, when multiple size does not conform to the whole brick, can the size of the whole brick ahead with two pieces of the better part of a large size instead of high aluminum square brick, such as paving it according to the elastic line construction.
2, smooth layer of mortar strength 1.2 Mpa according to roof sintering after paving brick row, details on the leveling layer size lines, every 5 brick distance plays a control line, and drew the line of control to the outer wall or the bottom of the parapet.
3. Spread coarse sand or ash (8-12% of lime dose) evenly on the gravel, sweep into the crushed stone with a broom, and then spray the water with a sprinkler or spray pot. The water that runs out of the water will be filled with sand or ash, until there is no more space and the point of the gravel is exposed.
From the viewpoint of greening engineering, the application of paving brick waste in garden and land landscape construction projects is the construction material of the medium matrix with high value. Using waste sintering brick paving on greening projects and roasting the waste in the process of production, its method is varied, such as the use of special methods, the use of a single purpose, high standard, adjust the environment and the recycling, etc. After crushing and classification of scrap material sintering brick paving brick, has the high particle strength, at the same time also has a high water retention and chemical properties of neutral, so they would be as a green up matrix structure material and as a medium of aggregate material prerequisites.
Paving brick roasting is a key link in the process of brick process, generally is the roasting temperature control between 900 ~ 1100 ℃, make bricks to the partial melting and sintering. If the baking temperature is too high or too long, it is easy to produce firebrick. The characteristic of the firebrick is the color depth, the knock sound, the deformation is large. If the roasting temperature is too low or too low, the fire brick will be produced. Owing to the characteristics of the fire brick, the color is shallow, the percussion is dumb, the strength is low, the water absorption rate is large, the durability is poor. When roasting in a brick kiln is oxidizing atmosphere, the brick is red brick because of the formation of iron oxide (Fe2O3). If it is burnt in the oxidizing atmosphere, the red Fe2O3 is reduced to a green gray iron oxide (FeO), which is called green brick. The green brick is generally relatively red brick density, alkali resistance, durability good, but because of high price, current production application is less.
In addition, coal slag, high carbon content of fly ash and other industrial waste can be added into the clay to make internal combustion bricks. When the brick is roasted to a certain temperature, the carbon in the waste residue is also burned in the dry body, so it can save a lot of fuel and 5% ~ 10% of the clay raw materials. The internal combustion brick combustion is uniform, the apparent density is small, the thermal conductivity is low, and the strength can be increased by about 20%.