Quality Assessment of Building Materials is the first step whenever you decided to build your house.Here are some useful guidelines to check the quality of raw material to construct your house. The purpose of this article is to provide you the basic information. With the help of required and high-quality material, a person can easily construct elegant, stylish and quality house. The process is quite simple, you only have to get some basic information.
List of basic Raw Material used in construction:
A perfect quality house is not only concern with its layout, infect the quality of raw material matters a lot. following are some useful information regarding this matter.
Quality Assessment of Sand:
Sand is the basic elements that should have some qualities. Like all other materials, Sand also contains some attributes which specify its quality. A good quality sand does not contain the amount of silt m pore than 4%. a good quality sand consists of small stones and free from mud balls and unwanted material.
The size of the particles of sand is generally 1/16 mm to 2mm. According to the size, it is divided into a thin, thick and medium category.
A good quality sand contains small particles. However different categories are used for different purposes.
Thick size sand is used for underground water tanks and pillars, medium size sand is used for plaster and thin size sand is used for plaster finishing.
Builders and suppliers take advantage of our less knowledge and sold us low-standard sand.
the are some ways to check the quality of sand. One of them is following:
Take a little quantity of sand in a glass of water, shake it well and wait until sand collects at the bottom of the glass, you will see the soil and other particles come at the upper surface of the glass.
Another way is to mix Sodium Hydro Oxide in water and you can check the quality by noticing the change in color of the mixture.
Quality Assessment of Bricks:
Best quality bricks should be well burnt.
Bricks should have cracks and surface flaws.
Bricks should have uniform size and shape.
Bricks should create a clear sound when it stuck with something.
Edges of bricks should be compact and homogeneous.
When it is scratched by a nail, the surface should remain as it is with no scratch.
The weight should be 1850 kg/cum.
Good quality bricks do not suck more than 5% of water.
It should not break when it is dropped to ground from the height of one meter.
If it is socked in water for 24 hours, and then dry it in shadow it should not show white salts on its surface.
Quality Assessment of Cement:
The color of cement should be greenish gray.
It should be free from any hard lump, dust, and other foreign material.
If you insert your hand into a bag of cement it should give you a cool feeling.
If you throw a small quantity of cement into the water bucket, cement should float on the surface before immerse, if it sinks immediately then it is definitely impure.
When you rub cement between your fingers it should give a smooth finish.
The weight of standard cement should not be less than 1440 kg/cum.
The initial setting time of cement should not less than 45 minutes and final setting time should not more than 10 hours if it is of good quality cement.
Do not keep it in a wet place and in the rainy season make it cover with the sheets of polythene. Make sure you only open the bag of cement when it is required.
Quality Assessment of Stones/Crush:
Generally, if soil or dust collects on the crush than cement do not stick with it and the time to be strengthened and setting of cement effects.
That's why a good quality stone should be used because it is long lasting and strong and can make a perfect combination with cement.
Following are some criteria to check its quality:
Crush should be in different shapes and it should not be smooth.
It should not contain dust or any other unwanted material.
It should not have any colors on it.
Since crush is used after mixing it with water, so make sure the purity of water such as water should not contain any chemical composition.
Quality Assessment of Steel:
Steel should have following qualities:
It should be free from cracks.
The surface should be rust free as much as possible.
Dia all steel bars should be equal.
Steels weight should not be less than 7850kg/cum.
It is necessary to store steel in proper place. keep away from the wet place. keep it in dry and shaded place. If you are restricted to keep it in open place than make your don not keep it more than one month. and before using clean it properly.
You can apply a simple test to check the quality of steel. that is called a bend test. in this test, a steel rod is a bend from 90 to 350-degree angle and after that make it straight again. If the rod retains its original shape and there are no cracks on it then the quality is best.
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