percentage of fly ash sand lime bricks raw materials fly ash sand lime bricks: Fly ash bricks are building materials, especially masonry, which consist of water and class c and class f fly ash. They are compressed under a pressure of 28 megapascals or 272 atmospheres and kept for 24 hours in a steam bath at 66 degrees celsius and by a smooth air intake agent. Then the bricks are put through more than one hundred cycles of melting-freezing. These bricks have become known as "cement" bricks due to their high calcium content. This method saves energy and reduces mercury, and its cost is 20% of traditional clay brick production. History Edit Historically, coal dust has always been collected as waste from homes and industry. In the 19th century, coal ash was collected by "scavengers" and given to local brickmakers who mixed the ash with clay. The proceeds from the sale of ashes were usually used for collection. Clay is usually obtained during the formation of coal. When the charcoal burns, the fire clay particles remain as ash. In large boilers, fire ashes are compressed for a long time. These days, pulverized coal technology is preferred due to improved energy efficiency. In these conditions, the clay is removed through the chimney and placed in bag filters or electrostatic precipitators (ESPs), which gives rise to the name "fly ash". Raw material The strength of fly ash bricks with the above composition is in the range between 7.5 and 10 MPa. [citation needed] In fact, fly ash bricks are lighter and stronger than clay bricks. Its most important components include: fly ash, water, raw lime or lime sludge, cement, aluminum powder and gypsum. Autoclaving increases the hardness of blocks by improving the quality of cement. Gypsum acts as a long-term strength factor. In the chemical reaction, due to the presence of aluminum paste, it provides a distinctive porous structure (autoclaved sponge concrete), lightness and insulating properties. The mentioned properties separate it from other lightweight concrete materials. The end product is a lighter block weighing less than 40% of conventional bricks, while offering similar strengths. The specific gravity is around 0.6 to 0.65. The use of these blocks in buildings reduces the dead load (static load or static load) and thus saves 30 to 35% in the consumption of structural steel and concrete. Business processes fall into two categories. lime route and cement route (ordinary portland cement) which (the latter) is used as a source of lime. In the way of lime, the composition includes: fly ash (50%), crushed lime (30%) and anhydrous gypsum (20%), to which 3 to 4 times of soil, stone, sand or any inert filler is added. will be In the way of cement, the composition includes: fly ash (76%), ordinary portland cement (20%) and anhydrite (4%), to which 3-4 times of fillers are added. 
benefits of fly ash bricks
Due to its low weight, it reduces the dead load in structures (2.6 kg, dimensions: 230 mm x 110 mm x 70 mm). The same number of these bricks covers a larger area than clay bricks. High thermal insulation Due to its high strength, there will be practically no damage during transportation and use. 5. Due to the uniform size, plaster and brick mortar required for joints is reduced by approximately 50%. Due to less water penetration, water leakage through bricks is significantly reduced. Gypsum coating can be applied directly on these bricks without the need for lime undercoating. 8. These bricks do not need to be soaked in water for 24 hours and it is enough to sprinkle water before use. The following properties of fly ash affect the strength and appearance of fly ash bricks: Thermal loss: Fly ash loses its weight when burned at around 1000 degrees Celsius due to the presence of carbon and water. Weight loss occurs due to carbon combustion and moisture evaporation, which is called "thermal loss" and is expressed as a percentage. The lower the combustion loss, the better the fly ash, which should not exceed 5% as per BIS. [requires source] Fineness: Fine fly ash has more surface area to react with lime and this increases the pozzolanic activity, which contributes to the strength of fly ash bricks and should not exceed 320 m2/kg as per BIS. [required Calcium content (CaO): The pozzolanic reaction of fly ash is higher in high calcium fly ash. The higher the pozzolanic activity, the higher the resistance of fly ash brick. According to the ASTM C618 standard, fly ash is classified into two categories, class C contains more than 10% lime and class F fly ash contains less than 10% lime.[3] In addition, based on boiler operation, fly ash can be classified into two categories: low temperature (LT) and high temperature (HT). Low-temperature fly ash, which contains amorphous phases, is produced when the boiler temperature does not exceed 800 °C, while high-temperature fly ash, containing glassy reaction phases, is produced in superheaters at more than 1000 °C. Low temperature fly ash reacts well with lime while high temperature fly ash reacts well with ordinary portland cement. New research shows that the mass and thickness of the walls is one of the essential components in saving energy in the passive architectural design system of the building. Bricks and refractory bricks are what architects call "masses with a high thermal rating", which help to stabilize the temperature changes in the building. When bricks and firebricks are combined with other factors of the passive architectural design system, i.e. building orientation, ventilation and insulation, dependence on artificial heating and cooling is reduced and energy consumption is reduced. For optimal heating energy in winter and cooling in summer, brick is fully integrated with passive building design system to effectively use natural and available energy resources. Due to the precise formulation of its building materials, the natural compact density and thermal insulation characteristics of the refractory brick balance the temperature of the building and reduce the amount of energy consumption in order to create comfort and save costs all year round. 
fly ash brick making formula
In the raw materials used to produce antique gray brick and antique white brick, soil containing metal and iron oxides (not included: manganese oxide, iron oxide, titanium oxide) is used less. Gray color Brick gray is a very neutral color, this color has long been a symbol of neutrality, trust, confidence, wisdom and tact. Gray color is a symbol of peace and economy, therefore, it is one of the best options for the color of antique brick wall. Another property of gray brick is reducing stress and anxiety and reducing fatigue and lethargy. 
Gray leather design brick or gray brick is a new product of Amiran Nama company. The dimensions of the leather design gray brick are: 7x30 Gray brick is one of the most popular types of facing brick, which is produced in two types, fireproof and Dutch. The individual color of the gray facade brick has made this material very popular in the interior design of coffee shops, hotel lobbies, decoration of homes and offices, the exterior of buildings, etc. Are you planning to buy Tusi facade bricks, Online Brick is here to guide you in the specifications and price list of Tusi facade bricks.