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16 Cards in this Set
- Front
- Back
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These procedures for capping concrete cylinders and cores to meet the standard practice's requirements for... |
1) planeness 2) perpendicular |
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Equipment needed for the capping process includes capping... |
1) plates 2) alignment devices 3) melting pot |
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Plates for neat cement and high-strength gypsum plaster caps should be made of...
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1) glass 2) metal or 3) granite |
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Sulfur mortar cap plates should be formed against... |
metal or stone plates BUT no deeper than 12mm |
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ASTM # for Standard Practice for Capping Cylindrical Concrete Specimens |
C617 / C617M - 15 |
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Neat cement caps and high-strengh gypsum-paste caps shall be formed against a GLASS PLATE at least 1) ___ mm thick, a MACHINED METAL PLATE at least 2) ___ mm thick or a POLISHED PLATE OF GRANITE OR DIABASE at least 3) ___ mm thick |
1) 6
2) 11
3) 75 |
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In ALL cases of capping, the plates shall be at least ____ greater in diameter than the test specimen. |
25mm |
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The working surface shall not depart from a plane by more than ___ in ___. |
0.05mm in 150mm |
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The capping plates, when new, shall be free of ___, ___ or ___beyond those caused by the finishing operation. |
gouges, grooves and indentations |
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Metal plates that have been in use shall be free of gouges, grooves, and indentations greater than ___ deep or greater than ___ in the surface area. |
0.25mm, 30mm |
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Using a guide bar or bull's eye level, no single cap will depart from perpendicularly to the axis of a cylindrical specimen by more than ___. |
0.5° |
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The location of each guide bar with respect to it's plate must be such that no cap will be off-centered on a test specimen my more than ___. |
2mm |
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The flash point of sulfur is ___. |
207°C |
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If sulfur mortar, high strength gypsum paste and other materials EXCEPT neat cement paste are to be used to test concrete with a strength greater than ___ and the compressive strength is ___ than the cylinder compressive strength. |
7000 psi, less |
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The average strength of 1) ___ capped with the material is not less than 2) ___ of the average strength of 3) ___ companion cylinders capped with 4) ___ or 5) ___ground plane to within 6)___. |
1) 15 cylinders 2) 98% 3) 15 4) neat cement paste 5) 0.05mm |
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The standard deviation of the strengths of the capped cylinders in not greater than ___ times that of the standard deviation of the reference cylinders. |
1.57 |
