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Posted: Wed Dec 16, 2015 11:17 am
by michaelthegardener
ok so I asked for fibre reinforced concrete and didn't get it I got p200 whatever that is 
so my question is this how much of a problem is this ??? my workshop is costing me £3625 I don't want the base to start coming apart when its up " Steve" the driver is confident it will be fine but what do you all think im so pissed off with them ive been planning this literally years
Posted: Wed Dec 16, 2015 1:17 pm
by digerjones
Stop worrying, it will be fine. I would be more interested about getting some money back.
Posted: Wed Dec 16, 2015 1:25 pm
by michaelthegardener
Well I was charged £403.25. Was quoted £612 so I haven't paid for the fibres just pisses me off
Posted: Wed Dec 16, 2015 1:42 pm
by Captain Concrete
Under the test we have done Alkali resistant glass fibres do very little much more important is compaction of the sub-base and the quality of the concrete.
Posted: Wed Dec 16, 2015 6:48 pm
by michaelthegardener
so just hope for the best then 
Posted: Wed Dec 16, 2015 6:56 pm
by lutonlagerlout
£200 buys a lot of fibres
this is why i prefer tp email orders in for stuff as you have a record when they start to whine
ideally they should come rip it out and relay with fibres FOC
in the real world if the sub base is good as CC mentions and the concrete is a good strength you should be OK?
no idea what p200 is
c.25 c.30 c.35 is what i am used to
LLL
Posted: Wed Dec 16, 2015 7:36 pm
by msh paving
i use p210 for kerbs witch is c7.5 so i would guess p200 is around c20 mix normally the p stands for 10mm stone MSH
Posted: Wed Dec 16, 2015 7:43 pm
by michaelthegardener
Fibres are normally just for commercial buildings and workshops. Please feel free to call me if there is a problem with the base and we will do our best to rectify it, but Steve is confident that it will be ok
HOPEFULLY this has just saved you some money rather than cause you a problem.
I emailed back telling them hopefully isn't filling me with confidence what pisses me off the most is the fact i emailed about it phoned to book it then phoned again to check it was all ok ???
i just hope it will be ok but now im doughtng my work on the sub base :p
Posted: Wed Dec 16, 2015 9:47 pm
by lemoncurd1702
Let it go mate.
Your concrete is fit for purpose and they didnt charge for the fibres. If i was doing a shed base albeit not as large as yours, I would be chucking a 5 or 6:1 in the mixer and no re-bar. It's a shed base with the load evenly spread, I've seen 50 year old driveways at 75mm with only a few cracks. The spec you have put in will see you and yours out
If your that pissed about it start putting reviews on twitbook etc and send them the links.
Not nice though unless they're total "tw**s"
Posted: Wed Dec 16, 2015 11:57 pm
by lutonlagerlout
done a bit of googling
http://www.wrightmix.co.uk/concrete-products.html
p200 looks like a very weak mix to my mind
dunno what you ordered Michael but that looks like a leanmix to me
LLL
Posted: Thu Dec 17, 2015 6:56 am
by seanandruby
If it is inferior then you could always cut out the edge and replace with a strip foundation but leave the rest of the slab for working on.
Posted: Thu Dec 17, 2015 7:17 am
by michaelthegardener
I told them what it was for and that I wanted fibres they gave me a price stupidly I didn't ask what mix it was ill just have to get on with it I suppose and hope for the best it seams ok .....
Posted: Thu Dec 17, 2015 7:20 am
by lemoncurd1702
At least give it a couple of weeks to cure before doing anything radical then test an unobtrusive edge or corner see how it chips with a hammer. Or try disc cutter in the centre. You should be able to gauge it's strength if you are used to working with concrete products.
You probably told them what the mix was for rather than specifying it in tech terms and they delivered what they deemed as suitable.
On the LLL's link it says suitable for single story extension so don't stress.
Posted: Thu Dec 17, 2015 5:35 pm
by lutonlagerlout
yes for mass fill foundations
I always spec c.30 for slabs
anyway its too late now
hopefully your prep will make it a good job
cheers LLL
Posted: Thu Dec 17, 2015 7:40 pm
by dig dug dan
Are you using the slab as the finished floor in your workshop?