![]() ![]() The volume increase depends upon the quantity of Aluminum powder/paste that is added to react with the calcium hydroxide in the mixture. This is because hydrogen, which is a lighter gas than air is replaced by air that gets into the mix as the hydrogen foams up out of the mixture. The hydrogen that is formed in this process bubbles ( up to 3mm in size) up which comes out of the mixture and is replaced by air.Aluminum powder reacts with calcium hydroxide which is the product of reaction between cement and water. The expansion can be from 2 to 5 times more than original volume of the paste. Aluminum Powder) is added to the mix which causes an increase in volume. After the mixing process, expansion agent (i.e.Hence pests and termites do not survive on these kinds of blocks thus protecting the building from deterioration. The main raw material used in AAC production is fly ash (or pond ash), which is an inert material.Besides it also helps the mason as he can easily lift and place the blocks. ![]() The low weight of AAC blocks helps in the easy loading and unloading of these items when transportation to work sites are required.AAC blocks are resistant to thermal variations.It means longer life to the paints and interiors free from growth of any kind of fungus, providinghealthier and long lasting interiors to the occupants.AAC Block’s water barrier properties are further enhanced by adding silicone based additives. AAC Blocks do not have any “micro-pores” or continuous ‟capillaries‟ through which exterior surface water can be absorbed to interiors.So in the picture you can see an aac wall unaffected by the industrial fire that destroyed an adjacent wing, a surviving roof serves as a platform for fireman fighting the blaze.The aerated concrete demising wall protected the remaining portion of the building, enabling it to maintain its structural integrity.This coupled with their low thermal conductivity and diffusivity gives an indication that aerated concrete possesses better fire-resisting properties. The good fire resisting property of aerated concrete is due to the presence of high number of solid-air interfaces, which reduces the heat transfer.Ideal material for wall construction in hotels, auditoriums, studios, hospitals.Fly ash is a byproduct from burning pulverized coal in electric power generating plants. ![]()
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