PROPORTIONING CONTROLLED LOW STRENGTH MATERIALS USING FLY ASH AND GROUND GRANULATED BLAST FURNACE SLAG

摘要

As the construction industry continues to recognize the importance of sustainable development, technologies such as controlled low-strength material (CLSM) have come to the forefront as viable means of safely & efficiently using by-product & waste materials in infrastructure applications. CLSM is defined by ACI (American Concrete Institute) Committee-229 as a self-compacting, cementitious material used primarily as a backfill in-lieu of compacted fill. In this paper two industrial by-products, namely fly ash & ground granulated blast furnace slag, are used as constituent materials in CLSM. Mixture proportions developed for CLSM containing these waste materials were tested in the laboratory for properties such as flow & unconfined compressive strength. The cardinal aim is to analyze the experimental data generated to formulate a phenomenological model to arrive at the combinations of the ingredients to produce CLSM to meet the strength development desired at the specified age irrespective of the age & proportion of the mix.