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Topic : Construction Materials
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Construction Planning & Management

Asked by : Venkatesh M, Warehouse Manager, Larsen and Toubro
Industry : Construction
Functional Area : Quality Management
Activity: Question posted: 11 14 2008 10:50:16 +0000, 3 answers, 6231 views, last activity 07 06 2010 20:18:08 +0000
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You can also use this method, add a solution of sodium hydroxide or caustic soda to sand and stir it. If the color of solution changes into brown, it means it has impurities in it.....

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by   Pragya Kothari, Construction-Heavy, DLF  | 11 14 2008 11:03:50 +0000
  Answer modified by     Bellala Gopinatha Rao, Senior Consultant, Civil Adviser Project, Self Employ  | 12 11 2008 15:13:40 +0000
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Hi venkatesh

1. First of all u ask the sample which is approved for the particular project, and compare it.

2. Normally dry sand if u hold firmly in hand ( Fist) and open it should not get any shape.

3. colour and lumps indicates the quality of sand.

Rest u can trust fully on lab reasults. 

  Answered by     Anjali Bhatia, Construction-Heavy, Sobha Developers  | 11 14 2008 10:55:14 +0000
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Hi Venkatesh,

A simple test is to put a cup full of the sand into a glass jar and some clean water.  Shake the jar up and let it sit.  If the water becomes cloudy or murky then the sand has impurities in it and depending on how dirty it is will determine whether it should be used for structural purposes or not....

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I agree with you anant. It is the best method...  
I agree with Mr.mohammad and  I think there is no such empirical formula so you can spend a reasonable amount on site investigation.... 
Hey this will help you to find the right institute.....