pavement materials and construction vtu notes pdf 10cv763
#1

Good morning .am Mohammed Mudassir having USN 3vn13cv015 studying ib 7th sem .i need PMC notes please help me in this regard. thank you
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#2
Strength:
 The aggregates should be strong to withstand the stresses due to traffic wheel load.
 Aggregates used in top layers of pavements I.e. wearing course have to be capable of
withstanding high stresses in addition to wear and tear hence should posses resistance to
crushing.
Hardness
 The aggregate used in surface course are subjected to constant rubbing or abrasion due to
moving traffic.
 They should be hard enough the wear due to abrasive action of traffic.
 Heavy wheel loads can also cause deformation on some types of pavements.
 The mutual rubbing of stones is called attrition which also cause little wear in the
aggregates.
Toughness
 Aggregates in pavements are subjected to impact due to moving wheel loads.
 Severe impact like hammering is seen when heavily loaded steel tyred vehicles move on
WBM roads.
 Jumping of steel tyred wheels from one stone to another cause severe impact.
 The magnitude of impact increases with the roughness of load surface, speed of the
vehicular characteristics.
Durability
 They should be durable and should resist disintegration due to action of weather.
 The property of the stones to withstand adverse action of weather is called soundness.
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