Comparison
Comparison between AAC Blocks, Clay Bricks and CLC Blocks
Parameter AAC Block Clay Bricks CLC Blocks
Size 625mm X 240mm X 100 - 300 Mm 230mm X 115mm X 75mm 600mm X 200mmX100 - 300 Mm
Precision In Size Variation 1.5 Mm ( + / - ) Variation 5 Mm ( + / - ) Variation 3 Mm ( + / - )
Compressive Strengt 30 - 40 Kg / Cm2 25-30 Kg / Cm2 20-25 Kg / Cm2
Dry Density 551 - 650 Kg / M3 ( Oven Dry ) 1950 Kg / M3 800 - 1000 Kg / M3 ( Oven Dry )
Wet Density Approx. 800 - 850 Kg. Approx. 2400 Kg. Approx. 1200 - 1500 Kg.
Wastage Up to 5% Upto 20% Upto 10%
Baking Done in Autoclaves with High Pressure Steam; ready in 12 hours Done in Clay Kilns Done in open Sun; only ready in 25 days
Fire Resistance Up to 6 Hours for 200mm thickness 2 Hour 2 Hour
Sound Reduction (DB) 45 For 200 Mm Thick Wall 50 For 230 Mm Thick Wall 50 For 200 Mm Thick Wall
Thermal Conductivity Approx. 0.16 -- 0.25 Approx. 0.81 50 For 200 Mm Thick Wall Approx. 0.70
Surface Quality (Fungus problems) None; smooth clean finish with no fungus Fungus and salinity problems on the surface (Reh) Same as AAC Blocks
Adaptation To Various Surface Finishes Smoother surface results in better coating application Inconsistent surface Same
Mortar Consumption 0.018 Per M3 With 1:6 / 0.5 Bag OfCement 0.1 Per M3 With 1:6 / 1.35Bag Of Cement 0.025 Per M3 With 1:6 / 0.5 Bag OfCement
Construction Time Reduced by up to 50% compared to clay bricks Double AAC Blocks Reduced by upto 30% compared to clay bricks
Energy Saving 32 % (App.) Air-Condition Load Heating And Cooling Come Down No Saving Up to 20% saving
Cost Benefit Factor Dead Load Reduce Structural Cost. No Saving Less than AAC
Contribution To Carpet Area 2 - 3 % No Saving No Saving
Chemical Composition Fly Ash Used Min. 50 % Which Reacts With (Lime & Cement ) To Form AAC Which Is An Inert Material Soil Is Used Which Contains Many Inorganic Impurities Like Sulphates Etc. Which Results In Efflorescence Fly Ash Used