by ericmark »
Sun Dec 16, 2012 8:53 pm
I used one to test iron laden concrete blocks with idea of using them to replace the clay ones used. The one I had would go on until the temperature set before starting to cycle off and on which would takes quite a few hours.
However it took quite a time for the heat to start coming out so how one would know when at the 900 odd degs C it reaches I don't know.
At 1/2 hour we had problems as water started to be expelled from the bricks so clearly at 1/2 less than 100 degs C. While I was working on project cure was not found seemed there was a chemical change and however long we left new bricks water came out. Once heated first time even if soaked again there was not a problem. But to heat to over 350 degs needed to ensure full chemical conversion would cost more money than saved using cement instead of clay so think idea was shelved.
