ASTM C-1064

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1. The technician must dampen the sample container with water prior to sampling of concrete

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2. Complete the temperature measurement of freshly mixed concrete within................After obtaining the sample

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3. A maximum temperature of freshly mixed concrete is specified in ASTM C 1064.

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4. The calibration of temperature measuring device shall be performed by comparing the readings off the temperature measuring device at two temperature at least :

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5. The sample of concrete used for temperature determination must be rodded 25 time

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6. The temperature measuring device shall be calibrated

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7. How long must the temperature measuring device remain in the freshly mixed concrete for an accurate reading ?

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8. The temperature measuring device shall have a capacity of measuring temperature of freshly mixed concrete to ±.................degrees F(±............degrees C) throughout a range of..............to................degress

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9. It is not acceptable to measure the temperature of freshly mixed concrete in the transporting equipment or the forms after discharge.

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10. Concrete containing aggregate of a nominal maximum size of greater than 3 in. (75 mm) may require up to 20 min for transfer of heat from aggregate to mortar.

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11. Assuming the coarse aggregate size is less than 3 inches. complete the temperature test within .................minutes after obtaining the sample

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12. What must be done to the concrete surrounding the temperature measuring device after the device is submerged in the fresh concrete?

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13. According to ASTM C 1064, What is one reason to take the temperature of concrete ?

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14. Leave the temperature measuring device in the freshly mixed concrete for a minimum period off ..................min or until the temperature reading stabilizes.

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15. A composite sample of concrete is required even if the only purpose for obtaining the sample is to determine temperature.

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16. The sensor of the temperature measuring device shall have at least........in(...........mm) of concrete cover in all direction

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17. The temperature of freshly mixed concrete can be measured in :

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18. The concrete cover in the container must be at least three times the nominal maximum size the coarse aggregate

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19. What special procedures are required when taking the temperature of concrete containing large size coarse aggregate ( Over 3 in (75 mm)

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20. The reference temperature measuring device shall be readable and accurate to...............

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21. When determining the temperature of fresh concrete, What is the minimum amount of concrete cover in all directions around the sensor of the temperature measuring device ?

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22. Partial immersion liquid in glass thermometer shall have a permanent mark to which the device must be immersed without applying a correction factor.

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23. Gently press concrete around the temperature measuring device so that..............does not affect the reading.

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24. The temperature of concrete may be measured in a wheelbarrow

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25. The temperature of concrete may be measured in a wall form ?

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26. The temperature of the concrete is recorded to the nearest ;

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