Controlled Low-Strength Materials
Also Known As:
The ACI SP-150:1994 standard (CLSM), provides guidelines for the use of CLSM as a substitute for compacted backfill. CLSM, also known as flowable fill or unshrinkable fill, is a self-compacted cementitious material with a maximum unconfined compressive strength of 1200 psi according to the American Concrete Institute (ACI). However, in most applications, the compressive strength does not exceed approximately 300 psi to allow for easy removal if necessary.
The standard covers various topics related to CLSM, including the use of Class F fly ash in producing low-strength concrete and CLSM, optimization of mix proportions for flowable fill, factors affecting durability of CLSM, freezing and thawing durability, early set and strength development of CLSM, and the use of flowable backfill for pipeline bedding.
The standard also includes case studies such as the use of CLSM for pipeline bedding at the Denver International Airport and soil-cement slurry pipe embedment.
| Descriptors | Controlled Low Strength Materials |
| Language(s) | English |
| File Size | 3.7 MB |
