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∙ 11y agoWhere I am, concrete would be made in the proportions of 1 of cement, 2 of sand, and 4 of gravel. River gravel, by definition is stronger material than the fines and sand, for it has better withstood the travel down the river. Thus river gravel will always make a stronger concrete that material quarried from a hillside, even if nominally the same rock type.
The cement should cover every material surface inside the concrete. That is why too much sand (with its proportionately higher surface to volume ratio) will weaken the concrete.
The setting reaction is a complex set of calcium carbonate, sulphate, and silicate reactions which take considerable time to form the crystals which give the strength to the concrete. And, of course, any water surplus to the crystal formation will leave (minute) voids that will give a weaker concrete.
So for concrete constructions in which strength is vital (bridges, slabs) a long drying period is preferred, and the concrete should be kept moist for as long as possible.
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∙ 11y agoFor concrete made with 6 sacks of Portland cement per cubic yard, the approximate sand content would be around 1,800 pounds per cubic yard. This is based on a typical ratio of about 3 parts aggregate (which includes sand) to 1 part cement in concrete mixes.
One cubic meter of concrete has 1,000 liters. Therefore, 0.1 cubic meters of concrete would be 100 liters. This can also be expressed as 100,000 cubic centimeters.
A cubic yard of concrete typically weighs between 3,000 to 4,000 pounds (1.5 to 2 tons) depending on the density of the concrete mix.
This depends on many factors.
A cubic yard of concrete weighs the same underwater as it does on land, which is approximately 4,000 to 4,500 pounds. The weight is determined by the density of the concrete mix, not the surrounding environment.
Normal concrete has a density around 2400 kg/cubic meter or 4048 lb/cubic yard. There are many different kinds of concrete, many of which are much lighter. Cement is the liquid (or paste like) form, and tends to be much heavier than when it has cured into concrete. "Cement" is not concrete, but can be used to make concrete by mixing with sand, stone and water. The density of cement is about 3120kg/m3.
It is 0.65 cubic metres, approx.
how much does a cubic yard of concrete cost in atlanta georgia
One cubic meter of concrete has 1,000 liters. Therefore, 0.1 cubic meters of concrete would be 100 liters. This can also be expressed as 100,000 cubic centimeters.
An 80 pound bag of premix concrete will make .6 cubic feet of cured concrete. There are 27 cubic feet in a cubic meter, so it would take 45 80 pound bags to make one cubic meter.
Most bags will make a 1/3 of a cubic foot of concrete.
On average, 8 cubic feet of concrete can weigh around 4,000-4,500 pounds, depending on the density of the concrete mix.
compare 0.76 cubic meter to kilogram
7 gallons
0.001732
About 2.11 Cubic Yards.
First, things are not made of cement- they are made of concrete- which consists of cement, sand, gravel and water. Mix them using 1 part cement, 1.5 parts sand, 3 parts gravel. To calculate how much CONCRETE you need, multiply depth X width X length in inches, then divide by 1728. This will tell you the number of cubic FEET of concrete. To get the number of cubic YARDS, divide the cubic feet by 27. If you are using packaged concrete mix (Sakrete is one) then an 80 lb bag makes 0.6 cubic feet of concrete. NOTE: If you are working with concrete for the first time- do not add too much water (weakens the concrete) and do not get wet concrete on bare skin- it will cause a chemical burn. Wash it off promptly if you do.
An 80-pound bag of premixed cement = .667 cubic feet, or 2/3 of a cubic foot, of concrete. A 60-pound bag of premixed cement = .5 cubic feet, or 1/2 of a cubic foot, of concrete.