Can anyone give me the correct ratio mixture for concrete?

Question

Water, sand, rock and cement. Also the mixture for plastering. Thanks.

How many types of cement are available for the household use? What are the differences?

What type of sand is use for plastering?

Answer 1

3 to 2 to 1

Answer 2

The mixture for concrete should be 1 part cement,2 parts sand and 3 parts gravel.
This mixture will support more than 2000 lbs/square foot .
If you dont' plan to park a loaded semi on it and if your project is large enough,you could change to 1 to 2 1/2 to 2 1/2.
Sand and gravel are sold by the cubic yard so is important that you use them at the same rate.
By the way the cost of buying the ingredients is comparable to have the concrete delivered,the advantage is that you can mix it a little at the time and save the cost of having someone spread the concrete for you.

Answer 3

For small jobs, patches and repairs where quality control and time are not of the essence, concrete can be mixed by hand. Let's look at a simple recipe and method for making 'mud."
Instructions

* STEP 1: Try this simple time-tested mixture formula as a guide ' 1:2:3 parts by dry volume. That is: one part Portland cement, two parts sand and three parts coarse aggregate.
* STEP 2: Use a shovel to scoop these elements into a large wheelbarrow or a concrete mixing trough. It's wise to start with a moderate amount of dry mix as it gets exponentially harder to mix as water is added. Think of it as the world's biggest cake mix and remember how tiring mixing cakes from scratch can be.
* STEP 3: Use the minimum amount of water possible while still keeping the mixture workable. The less water used, the stronger the dried, finished product will be.
* STEP 4: Find the approximate proper wet consistency by again thinking of a well-mixed cake mix for thickness. Be sure that it is evenly and completely mixed.
* STEP 5: Try to use the same amount of water for additional batches to be mixed, and work fast to keep dry lines from forming. This is where the concrete is already drying and the transition to the new, wetter mix will be clearly visible and create a weak point.

Tips & Warnings

* You can also buy pre-mixed bags of ready-to-mix concrete at home centers and lumber yards. These require water and mixing; the measuring is already done for you.
* If you have doubts about your ability to "work" and "finish" concrete, hire professionals. Any job over a few square feet in size may be more than the average homeowner wants to tackle.

As far as plaster, there are many uses so I hope I picked the one you were wanting to use it for.
When mixing plaster or dry wall adhesive always put the water in the bucket before adding the plaster! If you try adding the plaster then the water it goes lumpy and has to be thrown away.
Add clean cold water to the mixing bucket and ensure that the bucket has been cleaned sufficiently from the last time it was used.
Now add some plaster, you can add large amounts to begin with but it's better to use a gauging trowel for adding plaster later.
Here we are using a mixer drill and paddle to mix the plaster, this makes it so much easier. If you have no mixer drill a smooth piece of wood can be used to mix the plaster.
Here the plaster has been mixed to the correct consistency and it is completely lump free! This can now be used.

Answer 4

There are four basic elements in concrete: Portland cement; a fine aggregate, such as sand; a coarse aggregate, such as crushed rock or gravel; and water.
The aggregates (sand and gravel) usually make up from 2/3 to 3/4 of the volume of any finished concrete. All aggregates should be clean and free of organic matter.
The water used for mixing concrete should be clean and free of acids, alkalies, oils and sulfates.
Although the ingredients in concrete are always the same, the finished results depend on the proper mix of the four elements.
The proper mix of ingredients is determined by the intended use of the concrete.
For foundations and retaining walls, use about 6-1/4 gallons of water for each sack of cement if the sand is damp. However, if the sand is wet, 5-1/2 gallons of water will easily do the job.
Concrete that's mixed for pouring sidewalks, stepping stones, slabs, etc., requires about 5-3/4 gallons of water per sack of cement if the sand is damp and about 5 gallons if the sand is wet.
If you are pouring heavy footings for walls where waterproofing is not a factor, mix the concrete with 1 part cement, 3 parts sand and 4 parts gravel.
For sidewalks, steps, driveways, etc., use 1 part Portland cement, 2 parts sand and 3 parts gravel.
For small jobs, you can measure the ingredients using an ordinary galvanized or plastic pail.
A wooden box measuring 12" x 12" x 12" can give you an accurate measurement for 1 cubic foot of sand or concrete.
Nail 3/4" half-round to one side of the box at carefully measured points. This will allow you to measure 1/4, 1/2 and 3/4 of a cubic foot.
Always follow the mixing instructions on the bag when mixing your concrete.

Answer 5

Contact your local concrete plant for help, or a local concrete finisher. Mixing raw materials to make concrete or cement will depend on the intended use. Less water, while being less workable, provides a stronger product / more water, while more workable - to a point, provides a weaker (more fragile) product. The amount of Portland will also determine what tensile strength the finished product will have.


Oooops, I just notice the qualifier "for plastering". You will not need large aggregates, only sand, water and Portland cement and color additive if you desire.

Answer 6

The normal mix for reinforced work is 1:2:4(by volume)
i.e. 1 part cement: 2 part sand : 4 part coarse aggregate
(normally granite),0.75 inch max. size

Concrete shall be mix thoroughly before adding water.
Too much water will cause segregation.
Too dry will not give you the workability.

Conrete shall be placed within 30 minutes of mixing.

Mix for plastering is 1 part cement to 6 part sand (by volume)

Answer 7

It's very easy. Screw what everyone else said. Shovel 20 shovels of sand to every bag of portland cement. This is for plaster. I would say use the same ratio of sand to portland and add some small gravel. Good luck.

Answer 8

G20

Answer 9

cement is three gravil one cement then mix add water

Answer 10

depends what brand you use theres intructions on the pack