Fly Ash Bricks vs Red Bricks: Which One Should You Choose?
Bricks are an essential building material used in construction for centuries. Traditionally, red bricks have been the most popular choice for building homes and commercial buildings. However, with the emergence of fly ash bricks, there has been a shift in preferences. In this article, we will compare fly ash bricks and red bricks based on various parameters.
Table: Comparison of Fly Ash Bricks and Red Bricks
Properties | Fly Ash Bricks | Red Bricks |
Raw Materials | Fly Ash, Sand, Cement, Lime, Gypsum | Clay, Sand, Water |
Manufacturing Process | Hydraulic Pressing | Moulding and Drying |
Density(Kg/m3) | 1700-1900 | 1900-2100 |
Compressive Strength(Kg/m3) | 75-100 | 100-150 |
Water Absorption(%) | 12-15 | 20-25 |
Thermal Conductivity(W/mK) | 0.90-1.05 | 0.60-0.90 |
Thermal Insulation | Good | Poor |
Anti-Termite Properties | Resistant | Non-Resistant |
How they are made:
Red bricks are made from natural clay that is molded, dried, and fired at high temperatures to give them their characteristic reddish-brown color. Fly ash bricks are made from a mix of fly ash, cement, sand, and water. Fly ash is a byproduct of coal-fired power plants.
Strength:
Both red bricks and fly ash bricks have high compressive strength. However, fly ash bricks have better strength and durability than red bricks.
Thermal Properties:
Fly ash bricks have excellent thermal properties as they provide better insulation against heat and cold. They can keep the interiors of a building cool in summer and warm in winter, thereby reducing energy costs. Red bricks, on the other hand, have low thermal insulation, and hence, they absorb more heat and cold.
Anti-termite properties:
Fly ash bricks are known to be resistant to termites and pests due to the presence of fly ash, which makes them an ideal choice for building foundations and walls. Red bricks, on the other hand, are susceptible to termite attacks and require additional pest control measures.
Cost:
Fly ash bricks are cheaper than red bricks as they are made from waste materials such as fly ash, which is abundantly available. Additionally, fly ash bricks require less mortar and plastering, thereby reducing the overall construction cost. Red bricks, on the other hand, are more expensive as they are made from natural clay and require more mortar and plastering.
Environmental Impact:
Fly ash bricks are considered eco-friendly as they are made from industrial waste, thereby reducing the carbon footprint. They also consume less energy during the manufacturing process. Red bricks, on the other hand, have a significant environmental impact as they require the mining of clay, which results in the depletion of natural resources and causes soil erosion.
Water Absorption:
Fly ash bricks have lower water absorption rates than red bricks, which makes them less prone to cracks and dampness. This makes them ideal for construction in areas with high rainfall. Red bricks, on the other hand, have high water absorption rates, which can lead to dampness and cracks in the walls.
Conclusion:
Fly ash bricks are a superior alternative to red bricks in terms of strength, durability, insulation, and resistance to termites. They are also cheaper and more eco-friendly. However, they may not be as aesthetically pleasing as red bricks. Hence, it is essential to consider your requirements and preferences before choosing between the two.