- How thick should my concrete slab be?
- How many square feet does an 80lb bag of concrete cover?
- How many bags of concrete do I need for a 12×12 slab?
- How much area does a bag of cement cover?
- How much does it cost for 2 yards of concrete?
- How many 20 kg bags of premixed concrete do you need?
- Do I need gravel under concrete?
- Should you put plastic under concrete?
- How much area does a 20kg bag of concrete cover?
- How many bags of concrete do I need calculator?
- How much concrete is in a 25kg bag of ballast?
- Can you pour concrete directly on dirt?
- How many bags of concrete do I need for a 4×8 slab?
- How many bags of concrete do I need for a 4×4 slab?
- What is the hardest concrete mix?

## How thick should my concrete slab be?

4 inchesStandard concrete floor slab thickness in residential construction is 4 inches.

Five to six inches is recommended if the concrete will receive occasional heavy loads, such as motor homes or garbage trucks.

To prepare the base, cut the ground level to the proper depth to allow for the slab thickness..

## How many square feet does an 80lb bag of concrete cover?

4 sq feet4 sq feet in that amount of cement.

## 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 much area does a bag of cement cover?

One 50-pound bag of Quikrete Fast Setting Concrete Mix yields about . 375 cubic feet. For example, if you need to cover 33.333 cubic feet, using 60-pound bags of concrete, divide 33.333 cubic feet by . 45 cubic feet to get 74.07 total bags of concrete.

## 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.

## How many 20 kg bags of premixed concrete do you need?

Yield: One 20kg bag will cover an area of 1.1m2 to a depth of approximately 10mm. Or 108 x 20kg bags equates to one cubic metre of mixed concrete. 20kg bags can be bought individually or as a pallet of 70.

## 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.

## Should you put plastic under concrete?

Recently, though, research has shown that the old traditional layer of 6-mil Visqueen (polyethylene plastic) under the slab is seldom effective for two main reasons: Although it may seem water-tight, this grade of material allows a lot of water vapor to pass through.

## How much area does a 20kg bag of concrete cover?

one 20kg bag will cover an area of 1.1m2 to a depth of approximately 10mm. or 108 x 20kg bags equates to one cubic metre of mixed concrete.

## How many bags of concrete do I need calculator?

For concrete, the formula for volume is as follows: length x width x thickness. 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.

## How much concrete is in a 25kg bag of ballast?

Tip: It is advisable to place a polythene membrane down prior to the concrete being laid to prevent damp rising through the concrete to the building. Ballast is usually sold in 25kg bags approximately 2 bags are needed to produce, 1 cubic foot of concrete.

## Can you pour concrete directly on dirt?

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

## 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.

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

Enter the size of the slab you want to build in square feet. The calculator will indicate the number of 60 or 80 pound bags of QUIKRETE® Concrete Mix you need to build a 4″ or a 6″ slab. (All yields are approximate and do not include allowance for uneven subgrade, waste, etc.)

## What is the hardest concrete mix?

You can add more Portland cement to bagged concrete to make it stronger. You can also add hydrated lime. To make the strongest concrete, the sand should be sourced from volcanic lava that has a high silica content.