Should you put plastic under concrete?
A concrete vapor barrier is any material that prevents moisture from entering a concrete slab. Vapor barriers are used because while fresh concrete is poured wet, it’s not supposed to stay that way. It needs to dry and then stay dry to avoid flooring problems. … This is why a vapor barrier under concrete is essential.
still, How many bags of concrete do I need for a 10×10 slab 4 inches thick?
Regarding this, “how many bags of concrete do I need for a 10×10 slab of 4 inch thick?”, at 4 inches thick, generally you will need 49 bags of 90lb ready mix concrete, 56 bags of 80lb concrete, 74 bags of 60lb concrete or 111 bags of 40lb ready mix concrete for a 10×10 slab.
next, Can I pour concrete directly on dirt?
Long story short, yes you can pour concrete over dirt.
then, What kind of gravel goes under concrete?
Most concrete contractors want a mix of coarse and fine aggregate to create a compactable base that is going to be safe for settlement and drainage. Crusher run (a mix of crushed stone and stone dust) is one of the best base materials for concrete flatwork.
Do I 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.
24 Related Questions Answers Found
How much will a yard of concrete cover 4 inches thick?
One Cubic Yard of Concrete: 4-inches thick – covers 81 square feet. 5-inches thick – covers 65 square feet.
How much area does a 50 lb bag of concrete cover?
Regarding this, how much does a 50 lb bag concrete cover?, as 133 lb concrete = 1 CF, so a bag of 50 lb concrete = 50/133 = 0.375 CF, therefore, a 50 lb bag of concrete approximately cover around 1.5 square feet area upto standard depth of depth of 3 inch for your patio and sidewalk.
How many yards of concrete do I need for a 10×10 slab?
10 x 10 = 100 square feet. 4 ÷ 12 = .33. 100 x .33 = 33 cubic feet. 33 x .037 = 1.22 cubic yards.
Can I use pea gravel under concrete?
While pea gravel can be used as a mulch alternative, garden border and other landscaping purposes, it is not the best choice for a patio base. … It should be ok to pour concrete over your gravel walk although you might want to give the concrete a little more depth along the sides.
How long does it take for 4 inches of concrete to cure?
Concrete typically takes 24 to 48 hours to dry enough for you to walk or drive on it. However, concrete drying is a continuous and fluid event, and usually reaches its full effective strength after about 28 days.
Is sand a good base for concrete?
Answered by LCD: Sand is a proper levelling course for use under pavers and ungrouted brick patios and such. It is definitely NOT a proper base for a driveway – it is too mobile, has low bearing capacity, moves about under load especially if very dry or very wet, and will cause structural cracking of your driveway.
Can you sprinkle cement over gravel?
Cement mix might work in some cases over an existing gravel driveway. Laying a concrete driveway over an existing gravel one is possible, but it is not generally recommended. The kind of gravel that is intended to go under cement is typically a smaller grade than what is used for gravel driveways.
Can you use pea gravel under concrete?
While pea gravel can be used as a mulch alternative, garden border and other landscaping purposes, it is not the best choice for a patio base. … It should be ok to pour concrete over your gravel walk although you might want to give the concrete a little more depth along the sides.
Can I pour cement over gravel?
Laying a concrete driveway over an existing gravel one is possible, but it is not generally recommended. … The kind of gravel that is intended to go under cement is typically a smaller grade than what is used for gravel driveways.
What size is a yard of concrete?
how is a yard of concrete measured? There are 27 cubic feet in one cubic yard. A cubic foot measures 12 inches wide x 12 inches high by 12 inches deep. When you calculate yardage for your concrete slab, patio, floor, or driveway, you do it depending on how thick (depth) it is.
How do I measure a yard of concrete?
Just follow these steps:
How much money is a yard of concrete?
How much is a yard of concrete? When estimating the cost of concrete, use $125 per yard as a ballpark figure. However, concrete prices differ by region, and you’ll have to pay a ready mix delivery fee, plus factor in labor charges if hiring a contractor.
How many bags of cement do I need for 100 square feet?
4 bags ( 401 kg) of cement and 1593 nos bricks are required for 100 square feet 13.5 inch brick wall.
How many cubic feet are in a 60-pound bag of concrete?
30 cubic feet, 60 pounds of concrete mix yields . 45 cubic feet and an 80-pound bag yields . 60 cubic feet.
How much area will a 50 lb bag of sand cover?
Regarding this, “50 lb bag of sand cover how much area?”, generally a typical 50 lb bag of sand yields 0.5 cubic feet that will cover 3 square feet area for standard 2 inch depth for excavation and backfills, for 1 inch depth, it will cover 6 square feet, for 3 inch depth, it will cover 2 square feet and for 4 inch …
How many bags of concrete make a yard?
Pure cement, sand and crushed rock all have about the same density, so a block of pure cement measuring 1 cubic yard of volume (about 3,600 pounds) will contain 45 bags of cement.
How much does 6 cubic yards of concrete cost?
Each cubic yard of concrete costs
$119 to $147 per cubic yard
delivered.
…
Short-Load Concrete Prices.
| Cubic Yards | Mixing On-site Fees |
|---|---|
| 6 – 6.75 | $60 |
| 5 – 5.75 | $70 |
| 4 – 4.75 | $80 |
| 3 – 3.75 | $90 |
How many inches of gravel do you need for a concrete slab?
Excavate the slab area to a depth of about 7 inches, allowing 3 inches for a gravel base and 4 inches for concrete.
Is it OK if it rains after pouring concrete?
Pouring Concrete in Rain. … Pouring concrete in the rain can compromise its strength, increasing the tendency for dusting and scaling to develop. Once the damage is done, it can be hard to rectify and will often ruin the appearance of the finished surface. Don’t let it rain on your parade.
How often should you water new concrete?
Properly curing your concrete improves strength, durability, water tightness, and resistance for many years. The first 7 days after installation you should spray the slab with water 5-10 times per day, or as often as possible. Once the concrete is poured the curing process begins immediately.
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