What is the Coefficient of Subgrade Reaction?
Bituminous Macadam is a Binder which is used for the 24-meter & 12-meter roads where the traffic movement is heavy. This can be laid in two or more courses for the better compressive strength. This shall comprise of 5 TO 7 percentage of bitumen. Semi Dense Bituminous Macadam is a binder that isRead more
Bituminous Macadam is a Binder which is used for the 24-meter & 12-meter roads where the traffic movement is heavy. This can be laid in two or more courses for the better compressive strength. This shall comprise of 5 TO 7 percentage of bitumen.
Semi Dense Bituminous Macadam is a binder that is laid after the BM course to obtain smoother finish on road surfaces. This is used in small roads of width less than 9 Meters. This course is laid directly on the wet mix macadam in smaller roads with a thickness of 25-30 mm. This shall comprise of 3 to 5 percentage of Bitumen.
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The coefficient of subgrade reaction is referred as the ratio between the pressure against the footing or mat and the settlement at a given point expressed as the coefficient of subgrade reaction which is defined as the ratio between the pressure against the footing or mat and the settlement at a giRead more
The coefficient of subgrade reaction is referred as the ratio between the pressure against the footing or mat and the settlement at a given point expressed as the coefficient of subgrade reaction which is defined as the ratio between the pressure against the footing or mat and the settlement at a given point which is expressed as ;
ks = q/S
where,
ks = coefficient of subgrade reaction
q = pressure on the footing or mat at a given point
S = settlement of the same point of the footing or mat in the corresponding unit of length
i. The value of k is independent of the magnitude of pressure.
See lessii. The value of s has the same value for every point on the surface of the footing.