What is requirement of a good road aggregate as per IRC

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Vipin ChauhanProfessional

Asked: June 4, 20222022-06-04T17:10:18+05:30 2022-06-04T17:10:18+05:30In: Highway Engineering

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govardhan karnam · Accepted Answer · 2022-06-05T16:04:02+05:30

Requirement of a good road aggregate as per IRC as follows:

Lab Test Name	Requirements	Property
Flakiness and Elongation Index	The flakiness index must be less than 15%. The elongation index cannot be higher than 15%.	Shape
Aggregate Crushing Value	For base course shall not be more than 45% and surface course shall be less than 30%.	Resistance to Crushing
Abrasion Test	The base course must not be more than 50% and the surface course must be less than 30%.	Resistance to abrasion
Soundness Test	It can’t be more than 12 percent for Na2SO4 and 18 percent for MgSO4.	The ability of aggregates to withstand the effects of weathering
Water Absorption	It shall not be more than 0.6%
Specific Gravity	2.6-2.9
Angularity Number	Min 0 to Max 11	Shape of Aggregate