Which property is NOT typically measured for CLSM performance?

In the context of Controlled Low Strength Material (CLSM), viscosity is not typically prioritized as a standard performance metric when assessing its suitability for practical applications. CLSM is designed primarily for its lightweight, flowable characteristics that allow it to fill voids and cavities effectively, along with compliance with specific density and compressive strength requirements for stability and durability.

The primary properties measured for CLSM performance include density, which ensures that the material is adequately lightweight and suited for the intended application, and compressive strength, which guarantees that the material can support any loads it might encounter. Hardness may be assessed in some contexts, but it is not as critical for CLSM performance compared to the other properties. On the other hand, viscosity is more relevant in discussing the flow characteristics of a material, but it does not directly impact the core requirements for CLSM performance in typical construction applications. Hence, while viscosity might be an important aspect in other concrete mixes or applications, it is not a typical measurement used for evaluating CLSM.