# What is a fire's effect on a concrete slab?

The effects of fire on a concrete slab may vary due to the type of aggregate that was used. The damage that fire can cause to a concrete slab can range from spalling, microcracking, chemical chang... Read More »

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## Can I Pour a Concrete Slab Over an Existing Slab?

You can pour more concrete over an existing slab if you do some preparation to the original surface. The problem with adding wet concrete to cured concrete is there will be no adhesion between the ... Read More »
http://www.ehow.com/way_6558583_can-slab-over-existing-slab_.html

## How much concrete is needed to pour a 20x20 concrete slab?

Assuming the slab is three-inches thick, you need 13,320 pounds of dry concrete, or 333 40-pound bags. You can calculate the exact amount for a different depth by calculating the cubic yards of the... Read More »

## How much concrete do i need for a slab?

Use about 115 percent of the finished slab volume. Concrete volume in cubic yards equals the surface area in square feet multiplied by the slab thickness in feet divided by 27. Normal slab thicknes... Read More »

## How much concrete is in a slab?

According to Princeton.edu, a slab is defined as a "block consisting of a thick piece of something." Concrete slabs are just that---large, thick blocks. Because of this, the amount of concrete in a... Read More »

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