An 80-pound bag of concrete makes 0.6 cubic feet. A cubic foot of any material is enough to fill a box that is 1 foot wide, 1 foot tall and 1 foot long.
Continue ReadingIn order to determine the volume of concrete required for a project, a worker must determine the surface area and thickness of the concrete. He calculates the surface area by multiplying the length by the width for rectangular projects. The project plans specify the thickness of the concrete. However, before multiplying the surface area in square feet by the thickness in inches, it is necessary to convert all measurements to the same unit. Divide the thickness in inches by 12 to convert it to feet, and multiply by the surface area.
Learn more about Building MaterialsConcrete mixing ratios are the formula for calculating the correct amount of each ingredient used, including water, cement, sand and aggregate, to produce concrete with the properties desired. A basic concrete ratio is one part cement, two parts sand, and three parts gravel, slowly mixing in water until workable.
Full Answer >The ratio of cement by volume for standard concrete is one part Portland cement, three parts aggregate and three parts sand. General purpose mortar requires one part Portland cement, one part hydrated lime and three parts sand.
Full Answer >Lean concrete is a mix where the amount of cement is lower than the amount of liquid present in the strata. This makes it ideal as a base layer where other kinds of concrete are placed on top. It is good for providing a flat bottom in uneven or dirt terrain.
Full Answer >It is not advisable to pour concrete in the rain because it is possible that the rain can wash some of the cement out of the concrete. This can make the surface weak and potentially cause problems in the future, such as surface scaling.
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