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12 Cards in this Set
- Front
- Back
Opc is made from |
Gypsum and Lime |
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Most appropriate method to specify concrete mix prop |
grade of concrete not Nominal mix or design mix ratio |
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Workability of concrete is improved by adding |
fly ash hydrated lime CaCl2 Bentonite ALL |
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Fineness of cement affects only |
Early gain of strength |
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Expansive cement expands mostly during its |
final hardening period |
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Ferro cement |
1. Reinf meshing in cement mortar 2. 1:2.5 ratio of cement sand 3. 5 to 8 percent reinforcement |
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Prestressing force is |
Compressive force |
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Prestressing tendons :... |
1. Group wires ..horz spacing = 5mm more than MSA or 40mm whichever greater 2. Single wires.. 3x Dia of wire or 1.5x MSA whichever greater 3. Large wires.. same as 1 or Maxm size of cable or bar 4. Vertical spacing =50mm |
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Lime pozolonna initial setting time |
120 minutes |
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basic water depends on |
cement sand ratio |
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preliminary test |
the test done in trial mix of concrete before use |
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preliminary test |
the test done in trial mix of concrete before use |