COUNTY SLIGO SEO CONTAE SHLIGIGH 2002 A.D.

 

EXPERIMENT NO. 12: TESTING SAND As rocks and stones move, they brush off each other and wear each other down. The little bits which come off are tiny chips "off the old block" and are called sand. This sand has to be washed to remove any clay it may contain if it is to be used by builders. In this experiment we try to measure the clay content of sand (Save this page, edit the Date and the Laboratory entries, and  print it out. Then do the experiment.)

Laboratory: Stokane National School Date: 27th March 2002 Objective: To investigate if sand contains clay Apparatus: Jam-jar of sand, jar of clean water Method: Place sand in jam-jar, top up with water, mix and leave to settle for a few days

REPORT We filled a jam-jar with sand, topped it up with clean water and mixed the lot together. We left it overnight and next day some clay and silt had come to the top.  We found that this measured about 2 millimetres deep, and the total height of the mixture was 100 millimetres. The sand had 2% clay in it. We tested another jar of sand and it had none which we could see or maybe very little. We could skim off this clay to make washed sand. CONCLUSION Sometimes sand contains clay.

BACK