Guys ...I'm struggling even though I have googled

 

I have a base to construct in M15 concrete   1:2:4

 

Size 130cms by 130cms and 25cms deep  .... ignore the fact that it will have rebar in  ...

 

I need to know the volume in CuM of the sand and the aggregate as it is sold in 'scoops' and I think one scoop is around 0.7M3

 

I think 4 bags of cement would be about correct number to buy

 

Thanks

 

 

Well I might be a little rough but this equates to 0.423 m3

So having a guess I would say to get 0.15 m3 sand & 0.3 m3 of aggregate 

57 minutes ago, BEVUP said:

Well I might be a little rough but this equates to 0.423 m3

So having a guess I would say to get 0.15 m3 sand & 0.3 m3 of aggregate 

Thanks ... I worked it out I think ...

 

This .423 don't you need to multiply by 1.54  which will make 0.65  ...if that is the case  it's 0.28M3 sand and 0.57M3 of aggregate ...so one scoop of each.

 

 

8 minutes ago, JAS21 said:

Thanks ... I worked it out I think ...

 

This .423 don't you need to multiply by 1.54  which will make 0.65  ...if that is the case  it's 0.28M3 sand and 0.57M3 of aggregate ...so one scoop of each.

 

 

I'm not sure why you would have to

get a scoop of each 3 bags of cement, buy more if required, make sand bags out of the left over sand, always handy to have.

27 minutes ago, BEVUP said:

I'm not sure why you would have to

 

27 minutes ago, BEVUP said:

I'm not sure why you would have to

I think it's to do with the little bits getting inbetween the big bits ...

 

From somewhere ..

Water = 0.5625 x 28.31685 = 15.92 litre, say, 16 litre. So, One bag cement needs 16 liter of water for 0.45 W/C ratio. The dry volume of concrete is equal to one and half times of wet volume. But it is better to use 1.54 for calculating dry volume.

call in ready mix truck 

14 hours ago, JAS21 said:

 

I think it's to do with the little bits getting inbetween the big bits ...

 

From somewhere ..

Water = 0.5625 x 28.31685 = 15.92 litre, say, 16 litre. So, One bag cement needs 16 liter of water for 0.45 W/C ratio. The dry volume of concrete is equal to one and half times of wet volume. But it is better to use 1.54 for calculating dry volume.

why just be complicated when you can be bloody well impossible? Just halve the quantities shown here and plan what to do with any left over concrete:

That's a 65 litre wheelbarrow