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A data sheet for a california bearing ratio (cbr) test, which measures the load-bearing capacity of soil. Various penetration, swell, and water content data, as well as unit weights and signatures of the technician, computer operator, and checker. The data is organized in a tabular format with clear headings and units.
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( Initial / Final )
a. DATE b. TIME c. ELAPSED TIME d. DIAL READING e. INITIAL HEIGHT f. SWELL PERCENT 0.00 ( d / e x 100 )
a. PENETRATION( in )
b. STANDARD UNITLOAD( psi )
c. PROVING RING DIALREADING( in )
d. CORRECTED RING DIALREADING( in )
e. TOTAL LOAD( lb )
f. UNIT LOAD( e / 3.00 )( psi )
g. CORRECTED UNITLOAD( psi )
h. ( g / b x 100 )CBR ( % )
a. WEIGHT OF TARE + WET SOIL b. WEIGHT OF TARE + DRY SOIL c. WEIGHT OF WATER, W (^) w d. WEIGHT OF TARE e. WEIGHT OF DRY SOIL,W (^) s
( a - b )
( b - d )
Grams
Grams
Pcf
Percent
Percent
f. WATER CONTENT,w = WW^ w (^) s x 100 ( c / e x 100 )
Grams
Grams
Grams
Grams
Grams
Grams
BEFORE COMPACTION AFTER COMPACTION TOP 1 INCH (^) FROM MOLD
DD Form 1212 (BACK), DEC 1999
CBR TEST GRAPH ( Plot test curve below to obtain corrected unit load )
UNIT LOAD
(psi) PERCENT OF STANDARD
PENETRATION (in)