Page 83 - HIGHWAY ENGINEERING LABORATORY_FLIP BUILDER

REFERENCE
WORK PROCESS DOCUMENT

Table 1. Suggested minimum values of ‘skid resistance’ (measured with
the portable tester)
Minimum
Category Type of site skid

resistance
(surface wet)

Difficult sites suchas:
1. Roundabouts
A 2. Bendswithradiuslessthan150mon 65
unrestricted roads
3. Gradients1in20orsteeperof
lengthsgreaterthan 100m
4. Approaches totraffic lights on
unrestricted roads
Motorways,trunkandclass1roads
B andheavily 55
traffickedroadsin
urban areas
(carryingmore
than 2000 vehicles per day)
C All other sites 45

DISCUSSION:* Interpret and comment the results
obtained

1. Report thesource and type ofbitumen.
2. Report the bath liquid used in the test and quotes the mean
softening point of your specimen. Comment on the value
obtained.
3. Ifthe two test temperatures differ by more than 1°C, offer an
explanation. UsingtheNomographgiven,determinethe
penetrationindexforthe
4. samplestested based upon the softening point test
temperature value known.

CONCLUSIONS:Make yourconclusion based on yourresult.

REFERENCES: Give at least 5 references you refer

Higway Engineering Laboratory page 70