When using Method B, what is an alternate surface that can be used when reducing the sample?

In the context of aggregate sample reduction, using a canvas blanket as an alternate surface adheres to best practices in material handling. Canvas provides a durable, non-static surface that can effectively facilitate the even spread of the sample, which is critical to achieving a representative subsample. Its surface allows for easy movement of the material without collecting moisture, dust, or debris that could potentially skew the results of subsequent testing.

While other surfaces might be usable in certain situations, they may not be optimal. For example, plastic sheets may create issues with static cling, potentially influencing the weight and distribution of finer materials in the aggregate. Cardboard can absorb moisture and contaminants from the environment, impacting the integrity of the sample. Wooden planks, while smooth, can also absorb moisture or have surface imperfections that might interfere with the proper reduction of the aggregate sample. The choice of a canvas blanket thus aligns with standardized methods to ensure consistent, reliable results in aggregate testing.