Question

I want to know about properties of aluminum powder ??

and how is affect if we add it to normal concrete ? if there a table or figure it will good.

Answer 1

Properties of aluminium powder-

1. Low density which makes it lightest commercially available metal.

2. Well suited at low temperatures as it's tensile strength increases with decreasing temperature while retaining its strength.

3. Resistance to corrossioas it instantly form oxide layer on surface.

4. Thermal conductivity is 3 times greater than that of steel.

Addition in normal concrete:

1. Fine, smooth metallic powder free from aggregates having atomic weight of 26.98 is added in the concrete.

2. Aluminium powder of Grade IS 438-2006 and ASTM B 212-99 are examples.

3. It is commonly used as an air entraining agent to obtain light weight concrete by a chemical reaction producing hydrogen gas in fresh mortar, so that it contains large number of air voids in mortar.

Sp Sravity 2.7

Colour silver

Melting point 660°C

Form powder