Concrete Mix
#1
02-15-10, 04:01 PM
Concrete Mix
Home Depot sells bulk (9cu/ft) sand/gravel mix for $29. What ratio of portland cement should I use with this aggregate mix? The gravel looks like 3/4".
I'm mainly using it to pour footings.
I'm mainly using it to pour footings.
#2
02-16-10, 05:14 AM
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That doesn't sound like much of a bargain, but for a 5 sack mix you would use 1.67 bags of cement. In this area, that would put your per yard cost at $120. Buying it as concrete mix in bags would be $128, and it would be a lot easier to deal with.
#3
02-16-10, 09:16 AM
Well, I don't know.
I've been using 90lb bags of Quikrete concrete mix which yields about 1/2 cu/ft of concrete. That 90 lb bag costs $3.46 at Home Depot here. A yard worth of concrete using these individual 90 lb bags would ultimately cost me $187.
But a yard of sand/gravel mix at Home Depot sells for $87, plus the cost of Portland cement. And a 94 lb bag of Portland cement sells for $8.
Therefore, if my calculations are correct it is definitely cheaper for me to buy the bulk sand/gravel mix plus a couple of bags of Portland cement.
Thanks!
I've been using 90lb bags of Quikrete concrete mix which yields about 1/2 cu/ft of concrete. That 90 lb bag costs $3.46 at Home Depot here. A yard worth of concrete using these individual 90 lb bags would ultimately cost me $187.
But a yard of sand/gravel mix at Home Depot sells for $87, plus the cost of Portland cement. And a 94 lb bag of Portland cement sells for $8.
Therefore, if my calculations are correct it is definitely cheaper for me to buy the bulk sand/gravel mix plus a couple of bags of Portland cement.
Thanks!
#4
02-16-10, 10:52 AM
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A 90 pound bag should be .76 cubic foot of concrete, requiring 37 to the yard for a price of $128.02
#5
02-16-10, 12:35 PM
Originally Posted by Tscarborough
A 90 pound bag should be .76 cubic foot of concrete, requiring 37 to the yard for a price of $128.02
