Can You Pour Concrete Over Dirt? Yes, you can pour concrete over dirt. If you have a very compact soil-type, such as solid clay, then you may have ground that is solid enough to support a slab over a period of time. One of the big risks for pouring directly onto the earth is water pooling beneath the slab and traveling up into the slab.
If the ground is dry, the ground will absorb moisture from the concrete and it won't cure properly. The ground should be very moist and compacted as well as you can manage. Also, wet clay is notoriously weak and you may end up with.
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Decks Footing Articles. Learn everything you need to know about installing concrete footings to support your deck. We will teach you how to determine the code compliant size of your footings based on the soil type and tributary loads. Check out our deck footing frost map to help you understand how deep your footings will need to be excavated.
Old, crumbling clay pipes can result in expensive sewer repairs. Low tensile strength: The high compressive strength of clay makes it difficult to crush, but it has low tensile strength, which means it will snap under extreme pressure. To prevent this, clay sewer pipe should ideally be encased in concrete, but this increases installation time.
Mar 19, 2019 - How to Pour a Slab on Clay Soil. Slabs made of concrete can be large or small, and have a variety of uses around the home. Unfortunately, if you have clay-heavy soil, then you may run into difficulty when pouring a slab. The clay can compress under the weight of the concrete, causing the slab to shift or sink over.
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