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
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 depth of footings is determined by the depth of the frost line. The top of the footing must be poured below the frost line to maintain stability.Full Answer >
To sand down concrete, remove any coating, seal the cracks and joints with an epoxy filler, attach metal-bonded diamond discs to a grinder, and sand the surface of the concrete. Start with a 30- or 40-grit diamond disc, and slowly increase the grit until you reach the desired finish.Full Answer >
Reinforced concrete is a composite material that provides superior compressive and tensile strength, according to the Concrete Reinforcing Steel Institute. Commonly used in the construction of bridges and highways, reinforced concrete is one of the most economical and durable construction materials available.Full Answer >