Benefits and characteristics of cement bricks (solid bricks)!

Cement bricks The use of fly ash, cinder, gangue, tailings slag, chemical slag or natural sand, mud, etc. (one or more of the above raw materials) as the main raw material, cement as a coagulant, without high-temperature calcination and the manufacture of a new type of wall materials known as cement bricks. This product is in line with China's general policy of "protecting farmland, conserving energy, adapting to local conditions and utilizing materials locally", the State Council has forwarded the "Opinions on Strictly Restricting the Burning of Bricks on Destroyed Fields and Positively Promoting the Reform of Walls", and the Ministry of Finance and State Administration of Taxation has issued the "Cai Shui Zi" (1996), which is a new type of wall material. In line with the document Cai Shui Zi (1996) No. 20 issued by the State Ministry of Finance and the State Administration of Taxation "Notice on Continuing to Implement Preferential Policies on Value-added Tax for Some Products of Comprehensive Utilization of Resources, etc.", the products are building materials products free of value-added tax. Due to the high strength, good durability, standard size, complete shape, uniform color, simple and natural appearance, the material can be used as a clear water wall or any external decoration. Therefore, it is a formula 1, clay: to contain a certain amount of loose particles to facilitate the mixing of cement. Clay with less sand content can be matched with sand in the soil. Clay containing less sand and harder, must be ground before matching sand.

2, cement: mixed with 10% of 425 # common silicate cement, can improve the strength of the brick and water resistance, water immersion does not crack. Otherwise, the general brick will be cracked.

3, additives: mixed with a small amount of additives (reinforcing agent), in addition to improving the hardening strength of the brick, but also reduce the amount of cement, reduce product costs.

4, water: appropriate water consumption, brick strength is high. Molding water is less, the strength of the brick is poor, the material in the mold resistance, one-sided pressure, the bottom of the brick is not dense; molding water is more, the bottom of the wet, out of the mold is easy to touch the bad. When the sand moisture content of 3-5%, molding water consumption of 10% is appropriate. If the raw material is too much fine sand, it will be reduced to 8%. Edit this section of the production process operation 1, mixing time: mixing time is long enough to mix evenly. Dry mixing 20 minutes than 10 minutes to increase the strength of 15-23%; wet mixing time to the material is not appropriate for lumps. Mixed material storage time to about 2 hours is appropriate, too long or too short, will reduce the compressive strength of the brick.

2, molding pressure: clay-cement brick molding pressure to 500 kilograms per square centimeter is best. Under this pressure, its products have high compressive strength and good water resistance. Pressure is too low, not easy to compact.

3, maintenance conditions: clay cement bricks generally use solar protection. Solar natural conservation 7 days of age strength, equivalent to 28 days of age strength of 67-90%; 28 days of age strength for a quarter of age strength of 80-95%. Therefore, if the conservation site is small, clay cement brick natural conservation 7 days after the factory.