how to mix floor screed and really going to talk about the ingredients in it and the ingredients
in making floor screed is sand and cement and what i am holding here is sharp sand it
actually looks like plastering sand it is bagged u as sharp and sharer the better and
when talking about sand sharp sand plastering sand and building sand relay it is just the
size of the grains that is is made from sharp sand is a bigger size with bigger grits this
bucket i have a wee hand full of sharp sand in with building sand just wanting to show
the difference between building sand and sharp sand floor screed is going to be a semi-dry
mix of 1 cement to 4 sand. building sand i know i keep gong on but a good mix is made
with good ingredients so you gotta make sure you got the key ingredients for a strong strong
mix so building sand is a very fine sand and sharp sand is a very gritty sand when it binds
together the fact that the grits when you break it down to its Molecules all the wee
grit all the wee stones the will fall into place and will lock tight i am going to show
how i make screed up normally if i am mix i use dam sand and a mixer like so I will
add my damp sand 1st i dont go crazy with water you do not want a wet wet mix it will
be nearly impossible im not joking when i say nearly impossible to get a good floor
with a wet mix this is not concrete its floor screed its a sand and cement mix and you want
it semi dry dont think because it is semi dry it will be weak and you cant walk on it
this will be a very very strong mix at 4 to 1 sand and cement floor screed semi dry if
you are concerned about that you can give it a mist you see i am just putting very very
small amounts of water in if you notice int he middle where it is starting to come together
and ball this is the way you want your screed to sort of be you dont want to much balls
that will mean you are over mixing it so now that i am happy my and is damp enough i can
go ahead and add my cement so basically i have a full bucket of sand in there and a
quarter bucket of cement just for the demo of this video I am going to be making concrete
for a step here but i thought i could crack on and get this small demo uploaded here you
can see it is mixing well there this i petty much done this mix as is you an hold the mixer
forward a little and what that dose is that helps it mix at the back so there are no unmixed
gear at the back and it will speed up the mix as well so if you notice it still looks
dry but this is what you are looking for when you are mixing screed obviously ever put your
hand in a mixer unless it is turned off the way i am compressing it and it is going compact
and staying together like this that means it is ready its a ready mix its damp enough
you can see its stay together when that is compressed down and compacted and worked in
it will be perfect for demonstration proposes i am going to show you here how you know you
are starting to over mix your screed now this screed is still ok i just added a little bit
more water if you notice the balls starting to form you dont want the balls that dose
mean the screed is fine but the balls if you get to much if would be a nightmare to finish
as they are very compact and they would be difficult to compact and compress you floor
in and get a nice tidy finish so that is how you mix it guys 4 to 1 sand and cement semi
dry and do the hand test here witch im showing when its compressed it holds a little shape
and your done your ready for your screed a quick re cap screed is a 4 to 1 mix of sand
and cement your wanting sharp sand sharer the better it consists of mainly 3 main materials
and that is sand cement and water preferably if you have dam sand you wont need to mess
with water to much as it is a semi dry mix ad you wanna keep it as such there is other
ingredients you can add to you water you can add some sbr water proffers consists and mortar
mixes to enhance strength and water proof capabilities you can also add some small chippings
of stone real fine fine chips if you want to also add strength you could also add fibres
if you need to add strength but again they are all optional and the main ingredients
is sand cement water at a 4 to 1 ratio thanks for watching hope this helped SUSCRIBE FOR
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