ACI Aggregate Testing Technician - Level 1 - Section 8 AASHTO T 21 / ASTM C40 Standard Method of Test for Organic Impurities in Fine Aggregates for Concrete

ACI Aggregate Testing Technician - Level 1 - Section 8 AASHTO T 21 / ASTM C40 Standard
Method of Test for Organic Impurities in Fine Aggregates for Concrete

ACI Aggregate Testing Technician - Level 1 - Section 8 AASHTO T 21 / ASTM C40 Standard
Method of Test for Organic Impurities in Fine Aggregates for Concrete

This test method involves the use of hazardous materials. True or False? - ✔✔✔-True



The user of these standards is responsible for any safety problems associated with them.
True or False? - ✔✔✔-True



The principal value of this test is to furnish a warning that injurious amounts of ____ may
be present. - ✔✔✔-Organic impurities



A dark color in the test sample is a warning sign. True or False? - ✔✔✔-True



When a sample subjected to this test produces a color lighter than the standard color
solution, it is

advisable to perform the test for the effect of organic impurities on the strength of the
mortar. True or False? - ✔✔✔-False; when it produces a darker color



When organic impurities are evident in the fine aggregate tested, it is advisable to
perform Test Method _____ . - ✔✔✔-T71



For this test, bottles of at least 3 inch outside thickness should be used. True or False? -
✔✔✔-False; thickness no more than 2.5 in.



Unmarked bottles may be calibrated and scribed with graduations by the user. True or
False? - ✔✔✔-True



In such case, graduation marks are required at only ____ points. - ✔✔✔-Three
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