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CMEC ACI WORKBOOK > ASTM C 231 - PRESSURE METER > Flashcards

ASTM C 231 - PRESSURE METER Flashcards

1
Q

What type of aggregate is the pressure meter test designed for?

A

Relatively Dense Aggregate

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2
Q

Air cooled/ Lightweight

What type of aggregate is the pressure meter CANNOT be used for? (3)

A

1) Lightweight
2) Air cooled blast furnance slag
3) Aggregate of high porosity

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3
Q

Why do you need an aggregate correction factor for the air pressure test?

A

Offset the air content added to the sample when the air is pushed out of the aggregate by water and paste.

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4
Q

0.1% - __?

What range % must the pressure gauge be readable too?

A

0.1% - 8%

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5
Q

__ - 1.25 the height

What must the diameter of the metal bowl be when doing the pressure test?

A

0.75 - 1.25 the height

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6
Q

To what % is the cover assembly supposed to prevent the expansion factor change the result of the test?

A

0.1%

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7
Q

__ inch +- 1/16 inch diameter

What is the diameter of the tamping rod for pressure meter?

A

5/8 inch

+-

1/16 inch diameter

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8
Q

How much longer must the tamping rod be than the mold?

(Inches)

A

4 Inches

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9
Q

What is the MAXIMUM size the tamping rod can be for the pressure test?

A

24 Inches

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10
Q

(150 Hz)

What is the MINIMUM frequency of an internal vibrator when used for a pressure test?

A

9000 vibrations/minute

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11
Q

__ Inch - 1 1/2 inch

What must the OUTSIDE DIAMETER RANGE of an internal vibrator for pressure testing?

A

3/4 inch - 1 1/2 inch

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12
Q

How much LONGER than the depth of the container must the internal vibrator be when pressure testing?

A

At least 3 inches longer

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13
Q

1) How often must the pressure meter be checked and verified?

A

3 months

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14
Q

M__, P__, G__

What are the 3 different strike-off plates that can be used with a pressure meter?

A

1) Metal
2) Plastic
3) Glass

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15
Q

What is the MINIMUM thickness required for a metal Strike-Off plate?

(Inch)

A

1/4 inch

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16
Q

What is the MINIMUM thickness required for a Plastic Strike-Off plate?

(Inch)

A

1/2 inch

17
Q

What is the MINIMUM thickness required for a glass Strike-Off plate?

(Inch)

A

1/2 inch

18
Q

How much wider than the diameter of the measure must the strike-off plate be?

(Inches)

A

2 Inches

19
Q

Within _/16 inch

How smooth must the edges of the strike-off plate be?

Within what inch?

A

Within 1/16 inches

20
Q

_/4 inches

How wide must a strike-off bar be for a pressure meter test?

A

3/4 inches

21
Q

1/_ inches?

How thick must a strike-off bar be?

A

1/8 inches

22
Q

1_ inches?

How long is a strike-off bar?

A

12 inches

23
Q

1._ lbs +- 0.5 lbs

How heavy must a mallet be for a 1/2 ft3 AND SMALLER sized measure?

A

1.25 lbs

+-

0.5 lbs

24
Q

How heavy must a mallet be for a LARGER THAN

1/2 ft3 sized measure?

A

2.25 lbs

+-

0.5 lbs

25
Q

Calibration CANNOT EXCEED ___ months on TYPE B PRESSURE METERS?

A

3 Months

26
Q

If concrete contains aggregate that would retain on a (1) _ inch sieve, wet sieve the sample over a (2) _ 1/2 inch sieve.

A

1) 2 inch sieve
2) 1 1/2 inch sieve

27
Q

Rodding, Vibration, or Both?

What method of consolidation do you use for a slump that is >3 inches?

A

Rodding

28
Q

Rodding, Vibration, or Both?

What method of consolidation do you use for a slump that is between 1 inch - 3 inches?

A

Vibration

OR

Rodding

29
Q

Rodding, Vibration, or Both?

What method of consolidation do you use for a slump that is <1 inch?

A

Vibration

30
Q

How many lifts do you use when using pressure meter doing the RODDING method of consolidation?

A

3 lifts

31
Q

How many lifts do you use when using pressure meter doing the VIBRATING method of consolidation?

A

2 Lifts

32
Q

At how many points do you insert the vibrator when using it as the method of consolidation during a pressure meter test?

A

3 different points

33
Q

1/_ inches?

How much excess concrete do you want on top of the measure after you add your final lift?

A

1/8 inch

CMEC ACI WORKBOOK (11 decks)

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