Page 80 - HIGHWAY ENGINEERING LABORATORY_FLIP BUILDER

Page :
WORK INSTRUCTION
Edition :
Checking No.
ROAD SKID RESISTANCE TEST
(Reference Standard: Effective Date:
CIVIL ENGINEERING
BS 7941-1: 2006)
JKA/ DCC30112/ 2021 Amendment Date:

1.0 OBJECTIVE OF EXPERIMENT :

To measure texturedepth and skidresistance of aroad surface using theBS PendulumSkid
Resistance Tester

2.0 THEORY

Oneofthesurfacerequirementsforaroadpavementisitshouldpossessaadequateskid
resistancevalue.Skidresistanceisimportantforroaduserssafety.Agoodskidresistanceallows
for better grip between tire and road pavement surfaces. A new constructed road will
provide roadusersexcellentskidresistancevalue,butthevaluewilldecreasealongtheaging
oftheroad pavement surface caused by a few factors. Most of the road surfaces provide

a good skid resistance value in dry condition compared to wet condition. The presence
of water between the tire and road surface reduces the sufficient contact area which are
needed to create the 'grip'. This situation describes the procedure for determining the

frictional properties (skid resistancevalue)ofapavementsurfaceusingaPortableSkid
ResistanceTester.Theequipment willmeasurethefrictionbetweenaskiddingtireandwet
roadsurfaceinlowspeedsituation<60 km/h).

3.0 EQUIPMENTSETUP:

1. Portable pendulum skid resistance tester

2. Perspective rule
3. Brush

4. Thermometer

Pendulum Skid Resistance Tester

Higway Engineering Laboratory page 67