What is a unique characteristic of organic aggregates?

Organic aggregates possess a unique characteristic in that they require specific assessment for suitability in concrete. This is due to the fact that organic materials, such as wood or plant-derived aggregates, can have properties that significantly differ from traditional inorganic aggregates like sand and gravel. Their physical and chemical composition often affects their compatibility with cement and can influence the performance of the concrete.

It is crucial to evaluate organic aggregates for factors such as potential reactivity, moisture content, and overall durability. Without proper assessment, the use of organic aggregates could lead to problems such as reduced strength, increased shrinkage, and issues with long-term stability of the concrete mix.

This emphasis on assessment distinguishes organic aggregates from more conventional choices, where uniformity and established standards may apply more broadly without the same level of scrutiny regarding organic content.