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Per §10.8 (Step 5, Table 10.9), if the actual compacting factor is 0.1 HIGHER than the reference value of 0.80, the correction to water content is:
A{'text': 'No change', 'label': 'A'}
B{'text': '+3 percent (more water needed)', 'label': 'B'}
C{'text': '-3 percent (less water needed)', 'label': 'C'}
D{'text': '+10 percent (much more water needed)', 'label': 'D'}
Answer & Solution
Correct answer: B. {'text': '+3 percent (more water needed)', 'label': 'B'}
1. Table 10.9: every increase or decrease of compacting factor by 0.1 corrects water content by ±3% (no change in sand%).
2. A w/c change of ±0.05 corrects only sand (±1%), not water content.
_Source: IGNOU ET-522 Block-3 Unit-10 Concrete Mix Design, Table 10.9, §10.8 Step 5, p. 18_
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