Questions for Standard Specifications

What is the required Plasticity Index for Embankment and Subgrade for pavement according to the Bluebook 2013?

• Not more than 3

• Not more than 6

• Not less than 3

• Not less than 6

What is the required Plasticity Index of Subbase Coarse for pavement according to the BlueBook 2013?

• Not more than 6

• Not more than 12

• Not less than 6

• Not less than 12

What is the Maximum size of aggregate used for Subbase Course, Item 200?

• 3”

• 2”

• 1”

• None of the above

Cement that partially set or which lumps of caked-cement shall be rejected?

• True

• False

The use of Portland Pozzolan Cement Type IP shall be allowed, provided that...

• It meets the requirements of AASHTO M240/ASTM C595.

• Trial mixes shall be done and that the mixes meet the concrete strength requirements.

• The mortar compressive strength tested at 7 days are more than 85% of the compressive strength required for 28 days when tested in accordance with ASTM C150.

• None of the above

How many percent of clay lumps or shale are allowed for Fine Aggregate materials intended for concrete pavement, Item 311, in accordance with the Bluebook 2013?

• Not more than 3%

• Not more than 1%

• Not more than 2%

• Not more than 5%

Fine Aggregates for concrete pavement, item 311, that failed to meet the standard requirement for organic impurities, colorimatic test, shall be rejected with no exemption.

• True

• False

What is the maximum size of aggregate allowed to use for 280mm depth of concrete pavement, item 311, according to the Bluebook 2013?

• 2”

• 3”

• 4”

• 3-1/2”

How many percent of clay lumps is allowed for Coarse Aggregate intended for Concrete Pavement, Item 311, according to the Bluebook 2013?

• Not more than 1%

• Not more than 0.25%

• Not more than 3%

• Not more than 1.5%

Concrete Cores for strength test intended for acceptance of concrete is considered adequate if the average strength of the cores is equal to at least ___% of the specified strength fc’.

• 75%

• 85%

• 80%

• 90%