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2021-05-27

Does Chaffey College offer online classes?

Does Chaffey College offer online classes?

How are online education courses taught? Canvas – All distance education courses at Chaffey College are taught using Canvas, the college’s learning management system. Online – The course takes place completely online in Canvas and all work is completed and submitted online.

What is the disadvantage of concrete?

Another Disadvantages of Concrete is that Concrete is not ductile. Concrete is quasi-brittle and exhibits a strain-softening behavior. Compared to steel, the concrete has significantly low toughness. Toughness of concrete is only 1-2% of steel.

Is Aircrete as strong as concrete?

Aircrete is not as strong as concrete. It is 50% the strength of regular concrete. Unlike concrete, which contains materials that make it dense, Aircrete infuses air bubbles or styrofoam beads to make the concrete less compact and lighter.

Do you need rebar for 4 inch slab?

No, you do not need rebar for a 4-inch slab of concrete on grade. A 4-inch-thick slab cast on the ground and in permanent contact with it will float and rebar is not required. Rebar is recommended on concrete measuring 5 – 6 inches thick.

Is rebar better than wire mesh?

Considering the support constraint, rebar is undoubtedly stronger than wire mesh. Several constructors consider rebar for domestic jobs. For thicker driveways and locations that involve greater traffic, rebar is always a good option to consider.

Do you need wire mesh for 4 inch slab?

Do you need wire mesh for 4 inch slab? No, they do not. Larger projects or slabs may need steel reinforcement to provide support or extra strength. Wired mesh can also help resist cracking.

Can you pour concrete directly on dirt?

Long story short, yes you can pour concrete over dirt.

Is gravel necessary under concrete?

Whether you pour concrete for a walkway or patio, a strong gravel base is required to prevent the concrete from cracking and shifting. Gravel is especially important in clay soil because it doesn’t drain well, which results in water pooling under the concrete slab and slowly eroding the soil as it finally drains.

Can I use chicken wire to reinforce concrete?

Materials such as chicken wire, stucco mesh, wire screening, expanded metal, fence wire or fiberglass cloth should never be used as primary reinforcement because their properties are too variable or they are not sufficiently strong. You cannot rely on these materials.

Do I need rebar in concrete countertop?

To be effective, steel reinforcing materials should be placed in the bottom half of the countertop slab. Sufficient concrete cover is required to prevent corrosion and rust stains. Pro tip: Don’t use rebar to reinforce countertops that are less than two inches thick.

Does wire make concrete stronger?

Wire mesh makes concrete more durable and increases its strength. The area in which the concrete will be laid down should be covered in mesh before pouring commences.

Does a concrete floor need rebar?

Rebar is not necessary for every concrete project. The general rule of thumb is that if you are pouring concrete that is more than 5 inches in depth, you are probably going to want to add in some rebar to help reinforce the entire structure.