Quick Answer: Is It Cheaper To Mix Your Own Concrete?

How many bags of concrete do I need for a 4×8 slab?

Your project is 32 square feet at a depth of 4”.

Here is the quantity that you will need for your slab.

Quikrete Concrete Mix: 24- 60lb bags..

Do you need gravel 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.

What is a good concrete mix ratio?

In terms of the ratio for concrete, it depends on what strength you are trying to achieve, but as a general guide a standard concrete mix would be 1 part cement to 2 parts sand to 4 parts aggregates. For foundations, a mix of 1 part cement to 3 parts sand to 6 parts aggregates can be used.

What is the cheapest way to make concrete?

You can get cheaper concrete by purchasing sub-grade concrete. This usually is available at salvage yards and is clean material. Therefore, you don’t have to worry you’re not getting quality material. You’ll save a lot of money on concrete, and you’ll be doing your part for the environment by using reclaimed materials.

Can I make concrete with just sand and cement?

You cannot make concrete with only sand and cement because it requires a coarse aggregate like gravel. The stone component is the most critical, as that is what gives it its durability and strength. When mixing merely sand, cement, and water, you get a material closer to mortar.

How many bags of cement is required for 1 cubic meter?

Approximately 29 bags are required for 1m3 of cement.

How do you make concrete smooth and shiny?

If you are looking for the smoothest finish possible, then you need to follow specific steps (source).Step 1: Level the Concrete. Once you’ve laid your concrete, you need to level it. … Step 2: Wait for the Water to Bleed Off. … Step 3: Float the Concrete. … Step 4: Trowel the Concrete. … Step 5: Allow the Concrete to Cure.

How much does it cost for 2 yards of concrete?

According to the NRMCA – Ready Mixed Concrete Industry Data Survey, the average cost of concrete in 2018 was $120 per cubic yard, or $240 for the 2 cubic yards needed for a typical 10-by-10-foot patio.

Can I just use cement without sand?

Yes, cement can indeed be used without sand. Cement and water can be used as a slurry. … Cement is a binding material and it develops strength once it reacts with water. The strength in case of cement mortar (which is a mixture of Cement and Sand with water) is due to sand present in it.

How many bags of cement does it take to make a yard?

5 Bags# It takes approximately 5 Bags of Portland cement, 8 cubic ft of sand, and 20 cubic ft of gravel to make approximately 1 cubic yard (27 cubic feet) of concrete.

What happens if you don’t add enough water to concrete?

If there is too much water, the resulting concrete will be weak and will have poor surface qualities. If there is not enough water, the concrete will be hard to work into place. Concrete that is too dry on the left, and too wet on the right.

Is quikrete as strong as concrete?

Quikrete Fast-Setting Concrete Mix is easy to use — just add water — and it sets in 20 to 40 minutes. … That’s stronger than the concrete used for foundations on most homes.

How many bags of concrete is 2 yards?

To determine how many bags of concrete you will need, divide the total cubic yards needed by the yield. Use the following yields per each bag size: 40 pound bag yields .011 cubic yards. 60 pound bag yields .017 cubic yards.

What happens if you pour concrete on dirt?

The clay can compress under the weight of the concrete, causing the slab to shift or sink over time. It also can leach moisture from the concrete itself, resulting in uneven curing and a brittle base. With proper preparation, however, it’s possible to pour a slab on clay soil without encountering these problems.

How much does it cost to mix your own concrete?

Ready-Mix Concrete PricesItemAverage CostBase Cost$119 – $147 per cubic yardAdd For Delivery Over 20 Miles+ $9.50 per mileAdd For Less Than 10 CY Per Load+ $53 per cubic yardAdd For Saturday Delivery+ $8 per cubic yard4 more rows

Can I mix my own concrete?

To mix your own concrete for footings and piers, use 1 part Portland cement, 2 parts clean river sand, and 3 parts gravel (maximum of 1 inch diameter and specially washed for concrete mixing). … Add clean water, a little at a time, as you mix. The concrete should be plastic, not runny.

How much does an 80lb bag of concrete cover?

30 cubic feet, 60 pounds of concrete mix yields . 45 cubic feet and an 80-pound bag yields . 60 cubic feet.

How do you make concrete stronger?

Concrete is rated on a system that indicates the strength of the mix after it’s cured for approximately a month. To make the concrete stronger, add more cement or less sand. The closer you bring the ratio to an even one-to-one of sand to cement, the stronger the rating becomes.

How many bags of concrete do I need for a 12×12 slab?

How many concrete bags would I need for a 12 ft x 12 ft x 6″ slab? 120 x 80lb Concrete bags. How much does it cost to pour a 12’x12′ x6″ slab? Ready-mix costs approx $412.69.

How many bags of concrete do I need for a 10×10 slab?

For a 10 x 10 slab, you would need 77 60-pound bags or 60 80-pound bags. If we add an extra 10%, that’s an extra 8 60-pound bags or 6 80-pound bags.

Can you pour concrete directly on dirt?

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