Field Test of Sand

Sand is an important construction material. In order to ensure its quality at construction site, we have to know some of its field test besides laboratory test. Here we will see some field test of sand below:

1) First of all we have to identify good quality sand by eye-sight. We have to ensure not presence of foreign material and in-organic material is sand.

2) Take a pinch of sand and taste it. Presence of salt in sand will taste salty.

3) Take a glass and put 1/4 portion of sand and 3/4 portion of water in it.Now  shake it and let them settle. Pure sand will settle within some minutes. The impurities will settle after that and form a layer above pure sand.

4) take small amount of sand in hand and rub with finger, if fingers are stained it indicates the presence of earth mater in sand.

5) In-order to detect the presence of organic impurities in sand, add sand to the solution of sodium-hydroxide or caustic soda and stir it.If organic impurities presence in sand then the color of solution will changes to brown.

Following these steps we will able to ensure good quality sand in construction site.

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