Q:

What is the formula for concrete calculations?

A:

Quick Answer

The formula for concrete calculations is (length x width x depth) divided by 27. The result of this formula provides the number of cubic yards of concrete needed. The measurements must be in feet in order for the equation to work.

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Full Answer

Concrete is comprised of several components including water, Portland cement and aggregate, which is granular material such as sand and rocks. Portland cement commonly comes in a powdered form and is the binding agent in the mixture. Proper hardening of a mixture requires a humid environment to achieve optimal strength. In environments where it is difficult to ensure constant humidity, such as the outdoors, water is sprayed on the concrete, which is covered with a plastic sheet. The aggregate materials provide reinforcement and determine the density of the finished product.

There are a variety of concrete densities. Concrete for standard use is premixed with inexpensive lightweight aggregate such as gravel. High-density concrete require heavyweight aggregates such as barites, magnetite, iron or lead. The use of high-density concrete occurs in the construction of nuclear facilities and places where it is necessary to have high structural integrity while taking up little space. It is more costly than standard concrete, but provides superior shielding against radiation while being more cost effective than lead or steel alternatives.

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Related Questions

  • Q:

    How do you color concrete?

    A:

    Color existing concrete by cleaning the surface, applying a transparent stain. After 4 hours, inspect the concrete to determine if you need a second coat and applying it. After applying the sealer, allow sufficient time for the sealer to cure before allowing traffic on the surface.

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  • Q:

    How do you cut concrete?

    A:

    Cut concrete by consulting the home's mechanical prints to determine any obstacles, using a diamond blade on a circular saw to make the cut and breaking away the cut concrete with a sledge. The cutting process is slow, and cutting through a concrete floor should be the last resort.

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  • Q:

    How do you stain concrete?

    A:

    Apply concrete stain by cleaning the surface, protecting the surroundings, spraying the stain and back-rolling. Top with a sealer. Dye-based stains work well on fully cured concrete that no longer contains the lime required for acid staining. Complete this project in a weekend.

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  • Q:

    What is lean concrete?

    A:

    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.

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