What is the specified slump range for CLSM?

The specified slump range for Controlled Low Strength Material (CLSM) is indeed between 4 to 6 inches. This range is crucial for achieving the right workability and flow characteristics required when placing CLSM in various applications.

CLSM is designed to be a self-consolidating material, which means it should flow easily into place without the need for mechanical vibration. The 4 to 6 inches slump ensures that the material remains workable and can fill voids and contours without segregation.

If the slump were to fall outside of this range, the material could either be too stiff (if it is below 4 inches), which may hinder proper flow and placement, or too fluid (if it is above 6 inches), which might lead to segregation and affect the material's overall performance and strength. Thus, maintaining the specified slump range is essential for the successful use of CLSM in construction and infrastructure projects.