Title:
Proportioning Spent Casting Sand in Controlled-Low Strength Materials
Author(s):
Paul J. Tikalsky, Earl Smith, and Ray Regan
Publication:
Materials Journal
Volume:
95
Issue:
6
Appears on pages(s):
740-746
Keywords:
backfilling; cements; fly ash; mix proportioning
DOI:
10.14359/419
Date:
11/1/1998
Abstract:
This research was Conducted to evaluate the potential of using spent foundry or casting sand as a constituent controlled low-strength material (CLSM). The physical characteristics of spent casting sand or foundry sand are similar to those characteristics of fine aggregate used in high quality CL SM. This study developed different mixture proportions for CLSM containing spent casting sand that had strengths between 300 to 800 kPa at 7-days and sufficient flowing characteristics to be self-compacting and self- leveling. Each mixture was tested for strength, water demand, rate of strength development and fluidity. The results show that the spent casting sands provide high quality material for CLSM. The spent chemically-bonded casting sands are excellent replacements for portions of the fine aggregate, while clay-bonded casting sands must be more carefully proportioned and tested to prevent fluidity problems.