Makeing cement

[DDT]

mbjacobs
I guess our figures are very close, so it should be right.
In my area a 5 sack mix is 5 sacks per cu yard- 6 sack mix is 6 sacks per cu yard. for stronger mix they add 20% rock to the load. This is why I use road gravel instead of concrete sand.
With my 1 sack mixer @ 5 sack mix 5 dumps will be one cu yard. when I want alittle heaver mix I will put in 8 buckets instead of 10 per load, this should geat me close to a 6 sack mix, but I have never worked it out on paper, just a guess.

 

[RonL]

DDT

Some yards sell aggregate mix that contains the right proportion of sand and gravel for a concrete mix. You add the appropriate amount of portland cement and water. Crushed stone makes a stronger concrete than does washed smooth gravel. The amount of water added to the mix affects the end strength of the concrete. Some people like a wet mix that flows easy but a thick mix that needs to be rodded and vibrated into the forms yields a stronger end product.

RonL

 

[Pks]

RonL

This is exactly what I did several years ago. The yard had a special pile of sand and agrigate that was pre-measured for mixing of concrete. I paid a little less than $75 bucks for a whole yard (27 cu ft.).

Peter