Cement brick It refers to a new type of wall material made of fly ash, coal slag, gangue, tailing slag, chemical slag, sea mud, etc. (one or more of the above raw materials) as the main raw materials, cement as the coagulant, and without high-temperature calcination, called cement brick.
Cement bricks have heavy deadweight, high strength, and need not be fired. They are made of fly ash, a pollutant of power plants, and have been vigorously promoted. The disadvantage of such blocks is that the combination with plastering mortar is not as good as red bricks, which is easy to produce cracks on the wall, affecting the appearance. During construction, water shall be sprayed fully. For villas with high requirements, steel wire mesh can be hung on the wall to prevent cracks.
Features: This product is in line with China's general policy of "protecting farmland, saving energy, adapting measures to local conditions and using local materials" for building materials development, the State Council has forwarded the "Opinions on strictly restricting the destruction of farmland and burning bricks to actively promote wall reform", and the Finance and Taxation No. (1996) issued by the Ministry of Finance and the State Administration of Taxation Document No. 20 "Notice on Continuing to Implement VAT Preferential Policies for Some Resources Comprehensive Utilization Products", which belongs to building materials products that are completely VAT free. Due to its high strength, good durability, standard size, complete appearance and uniform color, this material has a simple and natural appearance, and can be used as a clean water wall or any external decoration. Therefore, it is a very promising replacement product for clay bricks.
1、 Significant economic benefits. The production cost and market price of cement bricks will vary with different raw materials and other expenses. The cost performance ratio of red brick is significantly higher.
2、 Mature production technology: adopting high-pressure forming technology, the cement brick has good compactness, low water absorption, good frost resistance and high strength. With these advantages, it can be applied to various urban construction projects.
Third, the cost is relatively low. More than 80% of the stone powder, waste stone or construction waste can be added into the environmental protection cement brick to greatly reduce the cost of cement. In addition to reducing the cost of raw materials, it can also enjoy the tax exemption policy.
Fourth, the product has a wide range of uses: cement bricks have been widely used in landscaping in gardens, residential areas, colleges, factories, sidewalks, squares, etc. by virtue of their own advantages.
Fifth, the equipment investment is small and the production speed is fast. A production line with an annual output of 60000~120000 square meters of colored paving bricks will be established. The equipment investment is small, and the time from equipment installation and commissioning, training of workers, to the formation of batch production capacity is short.
Structure: 1. Clay: it should contain loose particles to facilitate cement mixing. The clay with less sand content can be mixed with sand in the soil. The hard clay with less sand content must be ground before sand preparation.
2. Cement: 10% 425 # ordinary Portland cement can improve the strength and water resistance of the brick, and it will not crack after soaking in water. Otherwise, general bricks will crack.
3. Admixture: add a small amount of admixture (reinforcing agent), which can not only improve the hardening strength of bricks, but also reduce the cement consumption and product cost.
4. Water: If the water consumption is appropriate, the strength of bricks will be high. The forming water is less, the strength of the brick is poor, the resistance of the material in the mold is large, the single side is pressurized, and the bottom surface of the brick is not dense; The molding water is too much, the bottom surface is wet, and it is easy to be damaged when the mold is taken out. When the water content of sand is 3-5%, the water consumption during molding should be 10%. If there is too much fine sand, it will be reduced to 8%.
Preparation: 1. Mixing time: mixing can be even if the mixing time is long. The strength of dry mixture for 20 minutes is 15-23% higher than that for 10 minutes; The wet mixing time should be suitable if the material is not caked. The storage time of mixed materials should be about 2 hours. If the time is too long or too short, the compressive strength of bricks will be reduced.
2. Molding pressure: the pressure of clay cement brick during molding, 500 kg per square centimeter. Under this pressure, its products have high compressive strength and good water resistance. The pressure is too low to compact.
3. Curing conditions: cement bricks, also known as unburned bricks, can be cured by sprinkling water in the natural environment after forming. The strength of 7-day curing is equivalent to 67-90% of the strength of 28 day curing; The 28 day age intensity is 80-95% of the age intensity of a quarter. Therefore, if the curing site is small, the cement bricks can be delivered after natural curing for 7 days.
Specification: 240 * 115 * 53mm standard brick is a common cement brick in the market, referred to as standard brick for short; 240 * 115 * 90mm eight hole brick; 390 * 190 * 190mm hollow brick and other specifications
Cement brick standard (take the production of wall brick 240 × 115 × 90mm as an example, strength grade 10MPA) Material: ordinary concrete or high permeability fly ash concrete
Pinghu Huafeng Cement Products Factory is a large cement brick factory that has been engaged in cement products for a long time. It specializes in producing cement pipes, U-grooves, square piles, cement piles, road bricks Cement grass planting brick 、 Cement tile Concrete square piles, solid square piles, cement sewer pipes, concrete cement pipes, curbstones, curbstones, and other cement products, welcome new and old customers to consult and negotiate! //www.jxhfslzp.com Service hotline: 130-9562-2833 (Manager Yu)
