plaster not going off

[Ajax123]

good point there ajax, about the plasticised cement i being an old boy only ever use OPC for rendering/ screeding and then put my own aditives in the mix, and another old one is sugar in the sand/cement mix will slow/kill the set ,lol

We used to give each concrete driver a couple of bags of sugar when we were pouring rapid setting concretes in the summer up to just a few years ago. If they got delayed or held up on site they could chuck it into the mixer to stop the concrete going off. We did have one vindictive blighter who was sacked for stealing and so put his sugar in the deisel tanks of 3 lorries. stops that working as well.

I too much prefer the old fashioned OP cement and add my own retarders, plasticisers etc but it is getting more and more difficult to get it. It will only be a matter of time before it is "outlawed" cos we all got to save the planet.

 

[Ajax123]

they also put gypusm into the cement as a setting agent. If you ever feel really bored try putting high allumina cement and gypsum finish plaster together and then try mixing it up with an alluminium shovel. Bet you cant get it mixed before it goes hard. When it has gone hard I bet you can't get it off the shovel......

Fun days with nothing much to do in the technical lab......:hurray:

 

[Diamond Pool Finishers]

i tried to put brick acid in an alluminium bucket , wow!!!! it whent mad!!!!:yikes:

 

[Ajax123]

i tried to put brick acid in an alluminium bucket , wow!!!! it whent mad!!!!:yikes:

produces Hydrogen Gas - another reason not to smoke......BOOOM!

 

[doug boardley]

gonna re-title this thread "How to be a terrorist":yikes:

 

[Scott]

This thread is more like a chemistry lesson :lol::lol:

List for shopping tomorrow, ally bucket and brick acid

 

[Ajax123]

gonna re-title this thread "How to be a terrorist":yikes:

:lol::lol::lol:

 

[doug boardley]

time for a slurp.... Molotov ****tail anyone:smilewinkgrin:?

 

[White Room]

Hope big brother is'nt listening in:yikes::yikes:

 

[Ajax123]

This thread is more like a chemistry lesson :lol::lol:

List for shopping tomorrow, ally bucket and brick acid

when you get your brick acid get some pottasium permanganate and you can make incendairies as well........

Perhaps I should stop now before I get banned or a visit from the anti terrorists squad :yikes:,....... I don't even like fireworks :ban:

 

[Scott]

when you get your brick acid get some pottasium permanganate and you can make incendairies as well........

Perhaps I should stop now before I get banned or a visit from the anti terrorists squad :yikes:,....... I don't even like fireworks :ban:

I remember the potasium from school days along with the magnesium ribbon.

My other half is a science teacher too!

BOOM!

 

[Ajax123]

ooooh! Magnesium Ribbon. Pretty Fire.......safety goggles and gloves required for this next bit. Wrap one glass mable up in magnesium ribbon. Place in fume cabinet and close door. light the ribbon with a match and stand well back - very quickly - and watch the marble magically disappear - and if you use too much ribbon watch most of the fume cabinet magically disappear as well. I almost got the sack for that one....... I won't even let my kids use matches nowadays - honest.....

Pottasium is even more fun when you put it in water. You can watch it dance about like a flaming fairy. You have to store it in Oil to stop it from blowing up.

[ame=http://www.youtube.com/watch?v=OFG4Yr7lQzw]YouTube - Potassium and Water[/ame]

 

[Diamond Pool Finishers]

in the swimming pool plant room you never want to mix chlorine/acid =mustard gas:yikes: as used in the first WW,:yikes::yikes:

 

[Ajax123]

cough cough!!

 

[Ajax123]

how did we get here from plaster not going off......:yikes: could be my fault I guess