What is the maximum allowable weight discrepancy after washing the aggregate?

• A. 0.5%
• B. 1%
• C. 0.2%
• D. 0.3%

Answer: (C)

The maximum allowable weight discrepancy after washing the aggregate is essential for ensuring the accuracy and consistency of the materials used in construction. This measure is critical to achieving the desired properties in concrete, as aggregate quality greatly influences the overall strength and durability of the final product.

A weight discrepancy of 0.2% after washing indicates a very tight control over the materials, helping to minimize variations that could impact the aggregate's performance. This level of precision is necessary to maintain consistent mixing ratios, ensuring that the concrete produced meets the required standards for strength and durability.

In comparison, slightly higher discrepancies might be permitted in less stringent applications, but for critical structural components, adhering to a 0.2% limit helps prevent potential issues in the concrete's integrity due to variability in the aggregate composition. Thus, this standard is reinforced by industry best practices and quality control measures.