S to N - Answers Downstation
W to E - Answers Downstation
Stationing - Answers Starts at 0+00
Stationing Measurement - Answers 1+00 is 100 feet
Straight Edge is the - Answers Measurement of Pavement smoothness with a 15 foot 4.573 m rolling
straightedge
Straight Edge is used to - Answers identify problems
Random sampling - Answers Are random numbers generated usually by a VT for cores to be extracted
from the roadway
How often should you calibrate a Straight edge - Answers Calibrate at the start of each working period
Using the manual straight edge you find what kind of spot to place the rolling straightedge? - Answers
Locate a flat area with the manual straightedge and place the rolling straightedge next to the manual
straightedge and the gauge should read 0
The 3/16 and the 3/8 shims go under which wheels during calibration - Answers The outside wheels to
measure the low and the center to measure the high. Gauge should read 3/16 on the 3/16 shim and vice
versa for the 3/8 shims. Make sure the center wheel moves up and down freely.
Calibration materials for Straightedge - Answers Rolling Straightedge
Manual Straightedge
Manual Measurement (ruler)
x4 3/16 shims 5mm thick
x4 3/8 shims 10mm thick
When to perform final straightedge - Answers After an entire lane has been paved
When to perform final straightedge - Answers Pavement should be an ambient temperature
You cannot use the straightedge until it has been properly - Answers calibrated
When performing the straightedge procedure - Answers Maintain proper traffic management and safety
Cross slopes can be either done - Answers Manually or with a smart level
When using a manual cross slope you first - Answers Place a simple level on pavement
, After placing the simple level on the pavement then you - Answers Raise the down end of the level until
it is level (bubble center)
After the simple level is lifted until it is level you measure what - Answers The length of the simple level
and the height between the (previously down) end of the level to the pavement
Formula to calculate the manual cross slope - Answers Calculate the slope using the formula
( h / l ) x 100 = slope %
Requirements for the rolling Straightedge - Answers Must have a read out gauge, kept clean and in
working order, low and high reading, and marks to the nearest 1/16 (1mm)
Rolling Straightedge pulled at - Answers 3 to 5mph or less
Deficiencies pointed out with rolling straightedge you should first - Answers Mark the pavement at the
center wheel where the needle initially shows a deficiency and where is ends. Also record location and
measurements of deficiency.
Core sampling is used for - Answers testing density
and permeability
Core sampling equipment - Answers Concrete saw
Diamond bit core drill
Size of core depends on test
Ice chest (Optional)
Ice (Optional)
Asphalt to patch hole
During core sampling the barrel should always be - Answers perpendicular to pavement
Core sampling patching - Answers Fill hole with patch mix, if in lifts tamp each lift
Storing cores - Answers Store in ice chest with bagged ice on top or put in an air conditioned cab
Best stored upright in a cool place
DO NOT THROW INTO PICKUP
Determine Bulk Specific gravity on sampled cores - Answers Trim to correct lift