ACI - CONCRETE STRENGTH
TECHNICIAN TRAINING
1. Standard Practice for Capping Cylindrical Concrete Specimens
Answer ASTM C617
2. Procedures for capping enable concrete cylinders and cores to meet C617's
practice requirements for and .
Answer Perpendicularity, Planeness
3. can be made of glass, machined metal, polished granite, or diabase.
(C617)
Answer Capping plates
4. Sulfur caps can be formed against or plates.
Answer Metal, stone
5. The working surface of a capping plate shall not depart from plane by more
than mm.
Answer 0.05
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,6. Device used in conjunction with a capping plate to ensure perpendicularity.-
Answer Alignment device
7. Perpendicularity requirement of the axis of a cylindrical specimen. (degrees)-
Answer 0.5
8. The element of a melting pot that ensures against accidents during reheating
of cooled sulfur.
Answer Peripheral Heating
9. Temperature of the sulfur mortar pot/materials.
Answer 265-290 F
10. Capping material to be used on freshly molded cylinders.
Answer Neat Portland Cement paste
11. Remove this from the end of cylinders before capping.
Answer Oily or Waxy materials
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, 12. Materials that can be used to cap hardened cement concrete cylinders.
Answer Neat Portland Cement, Gypsum Cement, Sulfur
13. T/F Plaster of paris is an example of a high-strength plaster
Answer False
14. Sulfur and gypsum cubes much show this compressive strength or the
cylinder strength, whichever is greater.
Answer 5000 psi
15. Strength of the paste depends on , , and .
Answer Water cement ratio, time, type of cement
16. These are avoided when a slight twisting motion is applied while capping.
Answer Air voids and excess paste
17. Sulfur material should not be used more than times.
Answer 5
18. T/F When capping concrete cylinders with a compressive strength of 5000
psi or greater, it is permitted to reuse compound recovered from the capping
3/
17
TECHNICIAN TRAINING
1. Standard Practice for Capping Cylindrical Concrete Specimens
Answer ASTM C617
2. Procedures for capping enable concrete cylinders and cores to meet C617's
practice requirements for and .
Answer Perpendicularity, Planeness
3. can be made of glass, machined metal, polished granite, or diabase.
(C617)
Answer Capping plates
4. Sulfur caps can be formed against or plates.
Answer Metal, stone
5. The working surface of a capping plate shall not depart from plane by more
than mm.
Answer 0.05
1/
17
,6. Device used in conjunction with a capping plate to ensure perpendicularity.-
Answer Alignment device
7. Perpendicularity requirement of the axis of a cylindrical specimen. (degrees)-
Answer 0.5
8. The element of a melting pot that ensures against accidents during reheating
of cooled sulfur.
Answer Peripheral Heating
9. Temperature of the sulfur mortar pot/materials.
Answer 265-290 F
10. Capping material to be used on freshly molded cylinders.
Answer Neat Portland Cement paste
11. Remove this from the end of cylinders before capping.
Answer Oily or Waxy materials
2/
17
, 12. Materials that can be used to cap hardened cement concrete cylinders.
Answer Neat Portland Cement, Gypsum Cement, Sulfur
13. T/F Plaster of paris is an example of a high-strength plaster
Answer False
14. Sulfur and gypsum cubes much show this compressive strength or the
cylinder strength, whichever is greater.
Answer 5000 psi
15. Strength of the paste depends on , , and .
Answer Water cement ratio, time, type of cement
16. These are avoided when a slight twisting motion is applied while capping.
Answer Air voids and excess paste
17. Sulfur material should not be used more than times.
Answer 5
18. T/F When capping concrete cylinders with a compressive strength of 5000
psi or greater, it is permitted to reuse compound recovered from the capping
3/
17
