The great thermate debate

[JazzRoc]

(03-15-2011 07:55 PM)Alisha Wrote:  Lightweight concrete can be helpful through a thorough use of aluminium alloy and a mix of metal that hardens it a bit. that could be really helpful in gaining the strength and desired weight.

Lightweight concrete "helpful"? How?

"Aluminum alloy" is the main constituent of the 767, and seen pouring out of the building - due to its low melt point temperature of around 600+ C.

Aluminum alloys have a DIFFERENT COEFFICIENT OF EXPANSION from concrete. Heating or freezing such a mixture of materials would shatter it.

Aluminum is also REACTIVE to concrete and moisture together, going into solution as an ALUMINATE compound.

Apart from those points....