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Figure  13-15.Dispersion  cup  and  stirrer.
CONCRETE  AND  CONCRETE  TESTING - 14070_285

Engineering Aid 1 - Advanced Structural engineering guide book
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Figure  13-16.—Data  sheet  for  hydrometer  analysis. 1,000-mL  graduation.  Bring  the  suspension  to  the Calculations temperature expected to prevail during the test. Readings  taken  with  the  hydrometer  require Vigorously agitate the solution for 1 minute before taking and recording (fig. 13-16) your first hydrometer correction  due  to  the  following  factors:  (1)  the reading.  Then,  without  further  agitating  the  solution, difference between the test temperature at each reading take  and  record  additional  readings  after  elapsed  times and the standard temperature of 68°F, (2) the affect of of 4, 15, and 30 minutes and 1, 2, 4, and 24 hours. the  dispersing  agent  on  the  liquid  density  of  the Remove  the  hydrometer  from  the  suspension  after  each soil-water suspension, and (3) the difficulty of reading reading and place it in a graduate of clean water. the hydrometer at the meniscus of the murky soil-water 13-18







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