The formula for concrete mix is one part cement, two parts sand and three parts gravel or crushed stone. If hand mixing, it's inadvisable to exceed a water to cement ratio of 0.55, which translates to 55 pounds of water for every 100 pounds of cement.Know More
When mixing concrete, it's necessary to ensure that there is an adequate amount of aggregate. Leaving out the stone or sand aggregate weakens the concrete mix. Nearly all the properties of any concrete mix are primarily controlled by the water and cement ratio, especially strength and durability. It's possible to strengthen the concrete mix by adding additional cement without changing the proportion of sand and stone. The addition of excess water also weakens the concrete mixture. If a workable concrete mix can be made with less water, it is better for the concrete.
Mixing by hand does not necessarily save money compared to ordering from a ready-mix company unless the location where the concrete is needed is very remote. Hand-mixing is very hard work. The other consideration is the quality of the concrete, and the ready-mix option is usually the ideal option because of the better proportioning of the ingredients and more thorough mixing.
After pouring the concrete, mixers need to ensure that it cures properly with a curing compound. Typically, curing compounds are sprayed on the concrete after the final operation. A white-pigmented curing compound works best in dry, hot climates.Learn more about Building Materials
It will take 60 60-pound bags of ready-mix concrete to make one cubic yard of concrete. This yield is approximate and does not include allowance for uneven subgrade, waste, etc.Full Answer >
Length multiplied by width multiplied by height all divided by 27 is the formula to use to figure out the number of cubic yards of concrete necessary to complete a project. All of the dimensions must be in feet.Full Answer >
The thickness of a concrete footing depends on two main factors: the load-bearing value of the soil, and the type of structure. A pole barn, deck and brick house each need different footings. The requirements for these are stated in local building codes.Full Answer >
Concrete slabs should be 4 inches thick for normal residential construction. A slab should be 5 to 6 inches thick if heavy vehicles, such as motor homes or garbage trucks, will be parked on the concrete slab.Full Answer >