They are a viable replacement for conventional red clay bricks, which we normally use for our building construction. Red clay bricks are used for load bearing as well as for filler walls of RCC frames in high rise structures. There is considerable difficulty, of late in getting good quality bricks. ln addition manufacture of bricks cause depletion of top soil and is considered environmentally unfriendly. Therefore we have recently looked for viable alternatives. The alternative that we propose should be durable and have properties similar or better than conventional bricks. Autoclaved Aerated Concrete Block is a very timely introduction to the building industry, which fulfils the need for walls in buildings.
Less Load: It reduces the load on the foundation and other structural components in a structure due to its self weight of 550 to 650 kg/cum, as compared with the self weight of brick masonry of 1400-1600 kg/cum. One of the biggest features of AAC blocks is its light weight. These blocks possess a cellular structure created during manufacturing process. Millions of tiny air cells impart AAC blocks very light weight structure. Density of these lightweight blocks usually ranges between 550 - 650 kg/m3.
Earthquake Resistant: Because of reduction in self weight, AAC block construction attracts, Less earthquake load. The light weight property of the AAC blocks results into higher steadiness of the AAC blocks in the structure of the buildings. As the impact of the earthquake is directly proportional to the weight of the building, the building constructed using AAC blocks are more reliable and safer.
Fast Construction: The output of the masonry will increase because of less number of joints. As the AAC block is very easy to handle, manipulate and use ordinary tools for cutting the wood such as the drill, band saws, etc. could be easily used to cut and align the AAC. Moreover, the AAC blocks come with larger sizes and fewer joints. This ultimately results in faster construction work as the installation time is significantly reduced due to fewer amounts of blocks and the masonry amount involved is also lowered resulting into reduced time-to-finish.
Thermal Conductivity: The AAC block is thermally better and hence when adopted leads to less energy for air-conditioning. AAC block has exceptional thermal insulating qualities. The thermal conductivity of the AAC blocks helps maintaining the inner temperature to be warm during the winters and cool during the summers which ultimately leads to savings in air conditioning load and consequently enhanced energy efficiency.
Sound Insulation: The AAC Block has better sound insulation properties, Due to its air voids presence.The porous structure of the AAC blocks results into enhanced sound absorption. The Sound Transmission Class (STC) rating of the AAC blocks up to 45 db. Thus, AAC blocks have been the most ideal material forthe construction of walls in auditorium, hotels, hospitals, studios, etc.
Better Alignment: The AAC block is dimensionally more accurate as it is produced with wire cut technology in a certified factory. The process of manufacturing AAC Blocks ensures constant and consistent dimensions. Factory finished blocks provide a uniform base for economical application of a variety of finishing systems. Internal walls can be finished by direct P0P, thus eliminating the need of plastering.