Structural lightweight concrete (SLC) as defined by ACI 213R-14 must meet specific performance criteria:
Can consist entirely of lightweight aggregate or a blend with normal-density aggregate. Key Technical Sections aci 213r-14 pdf
6.1 General The construction practices used can affect the durability of concrete. Structural lightweight concrete (SLC) as defined by ACI
A 28-day compressive cylinder strength of at least 17 MPa (2500 psi) is required to be classified as structural grade. aci 213r-14 pdf
Guide for Structural Lightweight-Aggregate Concrete Published by: American Concrete Institute (ACI) Status: Current (Reapproved)