Abstract
Ground-glass pozzolan (G) obtained by grinding the mixed-waste glass to same fineness of cement can act as a supplementary-cementitious material (SCM), given that it is an amorphous and a pozzolanic material. The G showed promising performances in different concrete types such as conventional concrete (CC), high-performance concrete (HPC), and ultra-high performance concrete (UHPC). The current paper reports on the characteristics and performance of G in these concrete types. The use of G provides several advantages (technological, economical, and environmental). It reduces the production cost of concrete and decrease the carbon footprint of a traditional concrete structures. The rheology of fresh concrete can be improved due to the replacement of cement by non-absorptive glass particles. Strength and rigidity improvements in the concrete containing G are due to the fact that glass particles act as inclusions having a very high strength and elastic modulus that have a strengthening effect on the overall hardened matrix.
Highlights
The use of supplementary-cementitious materials (SCMs) can help cement-based material construction achieving sustainable development by reducing cement production and reduce fossil-fuel consumption and greenhouse-gas emissions
The concrete mixtures containing G exhibited mass losses slightly greater than those of the control concrete. It is a usual trend observed for the supplementary cementitious materials that seem more susceptible to scaling [7]
The ultra-high performance concrete (UHPC) mixtures in Class A are characterized by low flowability of less than 200 mm but with 2-day f'c under hot curing conditions (HC) of more than 200 MPa
Summary
The use of supplementary-cementitious materials (SCMs) can help cement-based material construction achieving sustainable development by reducing cement production and reduce fossil-fuel consumption and greenhouse-gas emissions. The groundglass pozzolan (G) obtained by grinding the mixed-waste glass to same fineness of cement can act as an SCM, especially it is amorphous and pozzolanic material. The mixed colored waste glass cannot be recycled and in the best scenarios, is stockpiled, causing obvious environmental and economic problems. Valorization of this waste glass as an SCM could provide dual advantages. The purpose of this paper is to summarize material specifications for the G for use as a pozzolan as a partial replacement of portland cement in concrete. The overall performance (fresh, mechanical, durability, and life-cycle assessment) of incorporating G in cement-based materials (CC, HPC, and UHPC) in both laboratory and field applications are highlighted in this paper
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