COMPRESSIVE STRENGTH BEHAVIOURS OF LAGOON–WATER CURED CEMENT-ALUMINIUM DROSS CONCRETE

Abstract

This study investigates the compressive strengths of concrete cubes and reinforced columns cast with partial replacement of cement using 0- 25 wt.% Aluminum dross (AlDr) and cured in Lagoon water for 7-42days and 1-6 months respectively. The results indicated cubes with 5 wt.% AlDr, 10 wt. % AlDr and control possess strength of 15N/mm2,14.59N/mm2 and 13.48N/mm2 respectively at 28-day curing while at 42-day the results are 16.89N/mm2, 12.22N/mm2 and 16.96N/mm2 for control, 5 and 10 wt.% AlDr respectively. The 42-day compressive strength (79.48%) confirmed the performance at 28-day strength (75%). Control cube (74.6-95.5%) has higher crystallinity compared to cement (65.1-90.1%) and AlDr (62.4-74.0%) but at 15 wt.% AlDr concrete the crystallinity (78.1-96.2%) is superior with marginal crystal sizes variation (12.8-16.9). The strength (~9.5 N/mm2) with 10 wt. % AlDr column cured for 6 months was better than the control columns environment (~7 N/mm2) at 2-month.

Keywords

• aluminum dross
• cement
• lagoon water cured
• compressive strengths
• crystal sizes
• column