Difficulty: Easy
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:
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:
Common Pitfalls:
Ignoring aggregate moisture leads to unintended w/c changes; periodically calibrate scales and verify dispenser accuracy.
Final Answer:
All the above
Discussion & Comments