Glass is a common material made from natural resources such as sand.Although much of the waste glass is recycled to make new glass products,a large proportion is still being sent to landfill.Glass is a useful resource...Glass is a common material made from natural resources such as sand.Although much of the waste glass is recycled to make new glass products,a large proportion is still being sent to landfill.Glass is a useful resource that is non-biodegradable,occupying valuable landfill space.To combat the waste glass that is heading to landfill,alternative recycling forms need to be investigated.The construction industry is one of the largest CO_(2) emitters in the world,producing up to 8% of the global CO_(2) to produce cement.The use of sand largely depletes natural resources for the creation of mortars or concretes.This review explores the possibilities of incorporating waste glass into cement-based materials.It was found waste glass is unsuitable as a raw material replacement to produce clinker and as a coarse aggregate,due to a liquid state being produced in the kiln and the smooth surface area,respectively.Promising results were found when incorporating fine particles of glass in cement-based materials due to the favourable pozzolanic reaction which benefits the mechanical properties.It was found that 20% of cement can be replaced with waste glass of 20 mm without detrimental effects on the mechanical properties.Replacements higher than 30% can cause negative impacts as insufficient amounts of CaCO_(3) remain to react with the silica from the glass,known as the dilution effect.As the fine aggregate replacement for waste glass increases over 20%,the mechanical properties decrease proportionally;however,up to 20% has similar results to traditionally mixes.展开更多
文摘Glass is a common material made from natural resources such as sand.Although much of the waste glass is recycled to make new glass products,a large proportion is still being sent to landfill.Glass is a useful resource that is non-biodegradable,occupying valuable landfill space.To combat the waste glass that is heading to landfill,alternative recycling forms need to be investigated.The construction industry is one of the largest CO_(2) emitters in the world,producing up to 8% of the global CO_(2) to produce cement.The use of sand largely depletes natural resources for the creation of mortars or concretes.This review explores the possibilities of incorporating waste glass into cement-based materials.It was found waste glass is unsuitable as a raw material replacement to produce clinker and as a coarse aggregate,due to a liquid state being produced in the kiln and the smooth surface area,respectively.Promising results were found when incorporating fine particles of glass in cement-based materials due to the favourable pozzolanic reaction which benefits the mechanical properties.It was found that 20% of cement can be replaced with waste glass of 20 mm without detrimental effects on the mechanical properties.Replacements higher than 30% can cause negative impacts as insufficient amounts of CaCO_(3) remain to react with the silica from the glass,known as the dilution effect.As the fine aggregate replacement for waste glass increases over 20%,the mechanical properties decrease proportionally;however,up to 20% has similar results to traditionally mixes.
