Field Concrete GDOT

Which of the following procedures is not an acceptable method for obtaining contreret sameples for testing?
A Diverting a concrete pump line into a suitable container.
B Passing a receptable through entire stream of contrete
C Discharging sample from teh bottom of the concrete bucket
D Diverting entire stream into a suitable container.

What is the minimum size sample required for performing the slump test, aire test, and making cylinders

If the air test results are below the specified limit it is acceptable to add air entraining admix on site

the temperature of frieshy miked concrete should be determinde within ----- after obtaining the samplne

the acceptable temperature of friesh concrete is from -- to ----F

how many drum revolutions should be turned after adding water at the jobsite

The slump con should be moistened before the test is conducted

The sllupm cone should be turned when rremoving from the contrete

The slump cone is removed frome the concrete in----

How many times do you tap the side of the slump cone after each layer is rodded

the slump is measured from-

The slump test shoub be conducted in a maximum time of ----

If early breaks indicate the acceptance strengths hamve been met the 28 day cylinders can be discardede and not used

How many timens is each layer o f concrenet rodded in any given test on concrete

Each layer of concrete is 1z3 the --- for the slump are and conrecte test sepcimens

Whichk concrete field acceptance test is teh hmost critical

it is accuptable for the concrete used for determinging ari content to be used for compressivie test specifment

concrete cylinders are stored in the shad and at a temperature between --- to ---F yor the first 24 hours

All concrete testing an cylinder fabrications must be completetd withein --- minutes after taking the sample

in rodding concrete cylinders the rod should penetrate the underlying layre-----

Con crete cylinders should be placed in curping tanks or other suityable curing facilities --- after manufacturing

What are the maximum number of drum revolutions allowed for a mixer?

Allowable time limitations are increased to 1.5 houres if a water reducer or retarder is in an ingredient of the mix

how many layers are placed in all tests for concrete

samples for early testisg of slump and air should be obtained after at least-- of the batch has been discharged

It is acceptable to test concrete after it has been placed through a discharge hose.