Concrete Batching – outcomes of proper proportioning and measurement What benefits does proper batching (accurate proportioning and measurement of all constituents) ensure for concrete?
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AEconomy
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BDurability
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CWorkability
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DStrength
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EAll the above
Answer
Correct Answer: All the above
Explanation
Introduction / Context:Batching is the controlled measurement of cement, aggregates, water, and admixtures prior to mixing. Whether by mass (preferred) or by well-calibrated volume methods, accurate batching underpins quality concrete production.
Given Data / Assumptions:
- Consistent materials and moisture corrections applied to aggregates.
- Scales and dispensers are calibrated.
- Mix design targets are known.
Concept / Approach:Economy results from avoiding over-cementing and minimizing rework. Durability improves when w/c is controlled and cover paste quality is consistent. Workability is achieved when water and grading are dosed to plan, avoiding last-minute, strength-reducing water additions. Strength depends on maintaining the designed w/c and paste volume.
Step-by-Step Solution:Accurate cement and water → w/c on target → predictable strength and durability.Correct aggregate masses + moisture correction → constant yield and workability.Admixture dosing as per specification → performance (set, slump retention) without variability.
Verification / Alternative check:Quality control data show reduced standard deviation of strength and slump when batching accuracy is maintained, directly translating to cost and performance benefits.
Why Other Options Are Wrong:
- Choosing any single benefit understates the holistic impact; all listed attributes improve with proper batching.
Common Pitfalls:Ignoring aggregate moisture leads to unintended w/c changes; periodically calibrate scales and verify dispenser accuracy.
Final Answer:All the above