QUESTIONS
◉ What is the significance of C136? Answer: -To determine the
grading of materials,
-compliance of particle size distribution,
-provide data for control of production of various aggregate
-developing relationships concerning porosity and packing
◉ What procedure should always be used unless otherwise specified
in c117? Answer: Procedure A
◉ What is an appropriate wetting agent to use for sieving through a
No.200 sieve? Answer: Water or any dispersing agent that will
promote separation of the fine materials
◉ What should the temperature of the oven be when drying
samples?(C117) Answer: 110 °C (+-5)
◉ If used, how much wetting agent should be used in procedure B?
C117 Answer: Enough to produce a small amount of suds when the
sample was agitated
, ◉ Report the amount retained by wash by....?(C117) Answer: <10%-
report to the .1%
>10%-report to the nearest whole number
◉ How long do you sieve material? C136 Answer: so that not more
than 1% of material retained on any sieve will pass during 1 minute
of hand sieving
◉ How accurate shall balances be fo fine aggregate? C136 Answer:
readable to the nearest .1 Gram or .1%
◉ How accurate shall balances be for course aggregate or mixtures?
C136 Answer: readable to the nearest .5 gram or nearest .1%
◉ What is the significance of C117? Answer: Accurate determination
of material finer than 75-um in mineral aggregate by washing
◉ What practice is used for sampling aggregate? Answer: D75
◉ The investigation of potential sample material should be
performed by....? D75 Answer: A responsible, trained and
experienced person