Humboldt H-4133 Acme Penetrometer - Manual (Page 5)

Report
The report shall include the following:
Data on Concrete Mixture
•
Type and proportions of cement, fine aggregate, coarse aggregate (including
maximum size and grading of aggregates) and the ratio of net water content to
cement content.
• Name, nature and percentage of active ingredients by weight of cement, of any
addition or admixture used.
• Air content of fresh concrete and method of determination.
• Consistency of concrete as determined by the slump or other test for consistency.
• Temperature of mortar after sieving.
• Date and ambient temperature during the test period.
Curves
For each variable and condition of concrete as specified in the Number of Specimens
section, the results from each of three or more rate of hardening tests shall be plotted
separately, showing penetration resistance in pounds per square inch or (mega-Newton’s
per square meter) as the ordinate and elapsed time in hours and minutes as the abscissa,
where 500 psi (3.5 MN/m
2 ) and 1 hour are represented by not less than 1/2 inch (13 mm).
Time of Setting Results
The following informations are required in the report on the time of setting tests:
•
A graph or plot of penetration resistance versus elapsed time for each time
of setting test.
• The times of initial and final setting for each test, reported in hours and minutes to
the nearest minute.
• The average times of initial and final setting for each test condition, reported in
hours and minutes to the nearest 5 minutes.
Gauge Adjustment
The gauge on this instrument may not go to the zero setting. This is caused by
either one or both of the following:
• The zero is offset to compensate for the weight of the plunger assembly.
• To calibrate this system accurately in the range from 20 to 180 lbs., the zero
may shift to a positive number.
Note: The gauge and cylinder assembly has been vacuumed and filled with
hydraulic oil and thus becomes a closed system. If this integrity is not preserved,
any air will void the calibration.