Effectiveness of Using Slag as Coarse Aggregate and Study of its Impact on Mechanical Properties of Concrete

Abstract

Traditional coarse materials like stone chips, brick chips are very costly. Huge amount of stone chips are being withdrawn regularly from different sources. As a result one day the amount of stone chips will be gradually finished possessing a great threat to the concrete construction sector. Industries which use ferroalloys, fabricates a large amount of slag as by product every year. This iron slag deals with third class hazardous waste category that requires a large place for dumping. Solid waste slag is transformable into resources for sustainable construction works which is also environment friendly. Perk of using low iron slag as coarse aggregate has immense effect on both environment and economy. By this means environmental pollution due to the waste slag can be minimized significantly and also there will be a solution of filling the paucity of natural aggregate in the construction industry. In this paper we observed the strength properties of slag incorporated concrete with different mix ratio. The proportion of stone chips and slag used in this investigation as coarse aggregate are 100:0, 90:10, 80:20, 70:30, 60:40, 50:50, 40:60, 30:70, 20:80, 10:90 and 0:100. A total of 396 specimens (4*4*4 cube) were cast using plain water in normal environmental temperature and kept for the periods of 7 days, 14 days, 28 days and 6 months respectively due to curing purposes. W/C ratios were varied as 0.60, 0.50 and 0.42 for making 20MPa, 30MPa and 40MPa concrete respectively and compressive as well as tensile strength were evaluated after specific exposure periods. The strength results of the specimen provide some important information regarding strength development of slag-aggregate concrete as computed as conventional concrete.

Keywords

• coarse aggregate
• concrete
• compressive strength
• curing period
• slag
• tensile strength
• w/c ratio

How to cite

A. Hasnat, M. A. Qurishee, I. T. Iqbal, M W Zaman, M. F. Wahid (2017). Effectiveness of Using Slag as Coarse Aggregate and Study of its Impact on Mechanical Properties of Concrete. Sonargaon University Journal, 2(2), 48–55.

@article{hasnat20174,
  title   = {Effectiveness of Using Slag as Coarse Aggregate and Study of its Impact on Mechanical Properties of Concrete},
  author  = {A. Hasnat and M. A. Qurishee and I. T. Iqbal and M W Zaman and M. F. Wahid},
  journal = {Sonargaon University Journal},
  volume  = {2},
  number  = {2},
  pages   = {48--55},
  year    = {2017},
  issn    = {2518-3125},
  url     = {https://su.edu.bd/journal/volume-2-number-2/effectiveness-of-using-slag-as-coarse-aggregate-and-study-of-its-impact-on}
}