Gradation tests for aggregates should be conducted how frequently?

Gradation tests for aggregates are crucial in ensuring that the materials meet the specifications required for construction projects. Conducting these tests weekly is appropriate because it allows for consistent monitoring of aggregate quality and performance. Given the fluctuations that can occur in aggregate characteristics due to different sources or batches, weekly testing helps to quickly identify any variations that could impact the concrete or asphalt mix being produced.

Frequent testing ensures that any issues can be addressed promptly, thus maintaining quality control and compliance with project specifications. Additionally, weekly assessments can facilitate better adjustments to mix designs, ensuring the final product achieves the desired strength and durability characteristics.

Other suggested frequencies — daily, monthly, or annually — may not provide the necessary oversight. Daily testing may be considered excessive in terms of resource allocation, whereas monthly or annual tests could result in delayed responses to variations in aggregate quality, potentially compromising construction integrity. Thus, weekly testing strikes a balance between thorough monitoring and operational efficiency.