Paving Brick Production And Use
Paving brick improves product yield and quality, accelerating the progress of brick industry. However, due to the development of the national economy is slow, people's living level is not high, long execution is low quality, low level of product standards and quality in the market is not cheap, dampened enterprise production enthusiasm, affect the enterprise's technological progress and the development of industry. In our country, we produce more than 600 million bricks of brick and brick, but the bricks that can carry the wall are few, and the sintering decorative brick is even more difficult to find. In 1978, China proposed to develop new type of wall materials, accelerate the technological progress and industry development of brick and tile enterprises.
The production process of paving brick
The production process of paving brick mainly includes taking soil, refining mud, making billet, drying and roasting. In addition to clay, it can be made from shale, coal gangue, fly ash, etc., because their chemical composition is similar to clay. But since they are less malleable than clay, they often need to add a certain amount of clay to meet the need for plasticity when making bricks. In addition, the coal gangue and fly ash are combustible industrial wastes, which contain unburned carbon, which can be burned in the billet as the bricks are roasted, thus saving a large amount of roasting coal. This kind of brick also called internal combustion brick or semi-internal combustion brick. The content of impurities in raw materials has great influence on the roasting temperature of clay brick and the color of finished products.
Problem of paving brick foundation work
1. Since the base of the aggregate surface layer is the plain concrete, the anti-bending strength is low, so the density of the square landscape brick soil is more than 97 percent. Because there is no geological report, it is necessary to pay attention to the stochastic strain during construction.
2, hidden creek should remove YuTu, for every 30 cm with gravel and soil layer hierarchical compaction, will be open for spring soil drying and sprinkled lime powder, such as dry again after compaction, or add crushed stone cement squeeze tight;
3. If the foundation with lower bearing capacity and the area is smaller, the cement or asphalt can be injected into it to improve the cementation state between soil particles to improve the bearing capacity of the square landscape brick foundation.
4. We need to find the intersection point or coordinate of the center or garden path of the paving ground according to the coordinate grid; Based on the azimuth and distance between these points, the longitude and theodolite are used to close the check core from both ends to ensure the accuracy of the mapping, and then the local lofting is conducted according to the control points. Based on the construction of the roadbed, the roadbed should be slightly wider, which would facilitate the construction of the square brick and ensure the roadbed.
5. Experiment on water content and compaction of rammed earth; Such as high water content, to make processing, such as dry, water wet, the water cut to achieve optimal value, it is advantageous to the friction coefficient between soil particles reach the best value, in order to ensure the compactness of soil base;
The production and use of paving brick has a history of more than 3000 years in China. Nowadays, the wall materials used in construction engineering, ordinary clay bricks still dominate. Although the ordinary clay brick has many deficiencies, but due to low cost, simple process, design and construction technology of mature and people's use of inertia and other reasons, common brick in quite a long time in the future, especially in the countryside, is still one of the main wall materials.