Title:
Concrete with Recycled Glass as Fine Aggregates
Author(s):
Hongjian Du and Kiang Hwee Tan
Publication:
Materials Journal
Volume:
111
Issue:
1
Appears on pages(s):
47-58
Keywords:
alkali-silica reaction; durability; fresh concrete; mechanical properties; sand; waste glass
DOI:
10.14359/51686446
Date:
1/1/2014
Abstract:
Recycled waste glasses were used as sand replacement in concrete at 0, 25, 50, 75, and 100% replacement ratios. Diverse concrete properties were tested in fresh and hardened states with three concrete grades; that is, with compressive strengths of 30, 45, and 60 MPa (4350, 6525, and 8700 psi). The incorporation of glass sand showed no significant influence on fresh or mechanical properties of concrete. Drying shrinkage was reduced due to the negligible water absorption of glass sand, especially at lower water-cement ratios (wc). Resistance to chloride ion penetration was substan¬tially enhanced because of the improved and densified microstruc¬ture at the interface transition zone (ITZ). Based on alkali-silica reaction (ASR) tests up to 49 days, cement mortar containing glass sand was found to exhibit innocuous expansion. Use of mineral admixtures, such as fly ash and slag cement, could further improve the durability of concrete containing waste glass particles.