concreting

[ruddez]

I have 90 square ms of concrete to lay at a depth of 4" I am going to use 4x1 sawn for the shuttering what is the maximum size bays I can put the shuttering at I wil put in steel mesh if needed as I don't want it to crack the base is to take up to 4 cars

 

[carlos]

Do you mean expansion joints mate?

 

[ruddez]

I am using the 4x1 to form the bays is that ok

 

[raggles]

I am using the 4x1 to form the bays is that ok

Yes as long as you set stakes at reasonable distances to stop it bulging out

 

[User________removed]

I have 90 square ms of concrete to lay at a depth of 4" I am going to use 4x1 sawn for the shuttering what is the maximum size bays I can put the shuttering at I wil put in steel mesh if needed as I don't want it to crack the base is to take up to 4 cars

If its for 4 cars mate can you not split it into 4 bays ? will make the pour and tamp easier, and create some expansion joints. Id defo put re-bar in also, and maybe even go with 6"

 

[warriorupnorth]

I was told by a very wise old concrete specialist that you don't need expansions in such a small area. But you do need saw cuts for controlled cracking . So pour in manageable areas but put saw cuts in at regular points

 

[ruddez]

I wouldn't concrete all in one day it would be done over 2 days the area is approx 10m x 3.8 wide if I break it up into 4 manageable bays making the shuttering with 4x1 and putting in reinforcement so the bays would be 3.8 x 2.5 with a edgeing trowel finish also the drive is on a slope would there be a problem with the concrete slumping down just curious how it will turn out

 

[wiganlad]

I have 90 square ms of concrete to lay at a depth of 4" I am going to use 4x1 sawn for the shuttering what is the maximum size bays I can put the shuttering at I wil put in steel mesh if needed as I don't want it to crack the base is to take up to 4 cars

Fibres or steel pins pal saves u getting the nips out for the mesh 150 of crush whacked then visqueen b4 u pour.

 

[Ridlerplastering]

I wouldn't concrete all in one day it would be done over 2 days the area is approx 10m x 3.8 wide if I break it up into 4 manageable bays making the shuttering with 4x1 and putting in reinforcement so the bays would be 3.8 x 2.5 with a edgeing trowel finish also the drive is on a slope would there be a problem with the concrete slumping down just curious how it will turn out

Don't have mix too wet and it shouldn't slump at 4 inches it's very unlikely to slump

 

[wiganlad]

60 slump rc35. gud tamping brush finnish edged with trowel sorted

 

[ruddez]

is that the grade of concrete 60 slump rc35 the concrete co told me I would need a general mix 3 what u think

 

[wiganlad]

if uve told um what its for and the weight load am sure they happy with that. we dun alot of site compounds for cabins n forklifts to park on and always used rc35 @ 60 slump if thers fall in the slab. 60 slump is stif enougj to hold up but still workable . remember to brush against the directiom its gna b traficked

 

[ruddez]

do u mean brush across the concrete to create grip not along it when going over with traffic

 

[wiganlad]

yeah its a better finnish than tamped once ur tamped lets it pick up a touch then easy float it flattens it lovley n brings upt he fats once the fats av firmed up dtag the brush over it and then edge it all with a trowel. you can prob hire an easy float with brush atatchment

 

[ruddez]

good advice and thanks

 

[lucius]

Ive got grooving tools for forming control joints in concrete they look better than sawing though sawing is probably easier.