How to Calculate the Needs of Cement, Sand and Stone For Casting

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A good casting would require good quality ingredients as well. The three main building materials commonly used in casting are sand, cement and split stone. Composition or comparison between Cement: Sand: Split must also be precise for maximum casting result and strong and durable.

To make a technical specification, RAB, it is better to use the desired quality of concrete grades, such as K-125, K-225. Avoid inclusion of compositions such as 1: 2: 3. This is because the expected quality of concrete will be appropriately achieved through mix design on the materials to be used. Comparison is only an approach, and can be applied to "small" activities

The applicable provisions in Indonesia are that this ratio is the weight ratio eg 1 kg of cement: 2 kg of sand: 3 kg split. But for the job eg make no at home alone, can also be used volume comparison.

The characteristics of fine sand for buildings such as sand have grains that are not clumped, or do not have attachments between the grains, because the sand of this type may not be mixed perfectly if it has been given cement. Then the good sand also should not have a sense, in other words tasteless, let's say the sand we buy is salty, then there is the possibility of sand is already exposed to sea water. If this happens then it can reduce the strength of our building, because it can cause both the corrosion of both the concrete itself and the steel reinforcement. Good sand is sand free from other elements, such as soil, garbage (whether organic or inorganic waste), because it is possible that other materials mixed in the sand can lead to structural weakening.

Corals or splits with high hardness, density, and durability properties will produce higher quality concrete, while reinforced concrete with opposite properties will produce low quality concrete. Corals with hardness, density, and high durability have better eternal properties. Similarly, coral or split rocks that are polluted, either by organic or inorganic materials can affect the quality of the aggregate and thus require the washing of the washing prior to use.

So, Suppose the comparison is as a bucket, eg 1 bucket of cement: 2 sand buckets: 3 split buckets, or 1 m3 of cement: 2 m3 sand: 3 m3 split.

In practice in the field, the artisans usually use a variety of doses, some use a bucket, spade, and also dolak.

The benchmark size of all such devices is to refer to 1 cement slurry

1 cement zak = 5 dust shovel
1 cement slurry = 1 dolak
1 cement zak = 0.024 m3 (is the approximation of 50kg cement zak size that is 10 cm x 40 cm x 60 cm)

So the concrete mixture can be 5 cement penges: 10 sand dredgers: 15 split split

or 1 reject of cement: 2 dolak sand: 3 dolak split

or 0.024 m3 cement: 0.048 m3 sand: 0.072 m3 split.

Up here easy to understand it right?

Well now for example we want to make no 10m x 6m with 10 cm thick how many material needs if you want built with 1: 2: 3 concrete quality?

The volume of concrete to be built is 10x6x0.1 = 6 m3
The total of the mixture is 1 + 2 + 3 = 6, it means 1/6 is cement, 2/6 is Sand, and 3/6 is split.
Then the need for cement: 6 m3 x 1/6 = 1 m3; Sand: 6 m3 x 2/6 = 2m3; Split: 6 m3 x 3/6 = 3 m3
1 m3 of cement is 1: 0,024 = 41.6 = 42 cement

Furthermore, it can be estimated how much the price to be spent for 42 zinc cement, 2 cubic sand, and 3 cubic split.

A good coral should be of varying magnitude, in order to complement each other to produce a mixture or concrete so solid. When taken to the Concrete Laboratory, if sifted with a sieve arrangement, the coral shall meet the following requirements. The remainder above the sieve of 31.5 mm, shall be a minimum of 0% by weight. The rest of the above 4 mm sieve should be 90% and 98% heavy. And the difference between the cumulative remains over two successive sieves is a maximum of 60% and a minimum of 10% by weight.


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Peternakan dan Herbal Updated at: 01:15
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