BS 1377 : Part 4 : 1990
California Bearing Ratio Test
Location							Job ref.
							Borehole/Pit no.
Soil description							Sample No.
							Depth			m
Test method  BS1377: Part 4:  1990: 7.4*							Date
Force measuring device no.						Unsoaked/soaked*
						Mean calibration				N/div
Penetration	Force gauge		Force on			Penetration	Force gauge		Force on
of plunger	reading     div		plunger   kN			of plunger	reding      div		plunger    kN
0.00mm						4.00
0.25						4.25
0.50						4.50
0.75						4.75
1.00						5.00
1.25						5.25
1.50						5.50
1.75						5.75
2.00						6.00
2.25						6.25
2.50						6.50
2.75						6.75
3.00						7.00
3.25						7.25
3.50						7.50
3.75						7.75
*Delete as appropriate
Moisture content after test
Container No.
Mass of wet soil+container (m2)						g
Mass of dry soil+container (m3)						g
Mass of container (m1)						g
Mass of moisture (m2-m1)						g
Mass of dry soil (m3-m1)						g
Moisture content  w=((m1-m3)/(m3-m1))x100						%
Average moisture content						%
CBR value at penetration of:
	2.5 mm		5.0  mm
Top	%		%			Operator	Checked		Approved
Bottom
Accepted CBR				%
									Form 4F