Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Using glass sand as an alternative for quartz sand in UHPC
HighlightsValorization of waste glass in concrete saves its landfills and reduce concrete price.GS with mean particle size 275µm can be used to replace QS in UHPC.GS as QS replacement can yield a UHPC with a dense microstructure.GS as QS replacement can yield a UHPC without any expansion from alkali–silica reaction.
AbstractUltra-high-performance concrete (UHPC) is characterized by a dense microstructure that yields ultra-high strength and durability properties. Quartz sand (QS) with maximum particle sizes of 600μm represents the coarse particles in (UHPC). The QS with optimum grading curve is obtained from crushing coarse sand or rocks, however this is a time-consuming, costly, and polluting process. This paper reports on a study to determine the possibility of producing and using glass sand (GS) for partial or total replacement of QS in UHPC. The results show that GS with a mean particle size (d50) of 275µm could be recommended as an optimal PSD to replace QS particles. The results demonstrate that compressive strength values of about 196 and 182MPa after two days of hot curing can be achieved when replacing 50% and 100% of QS with GS, respectively, compared to 204MPa for reference UHPC containing 100% QS. Incorporating higher replacement rates of GS was shown to produce UHPC of accepted flowability and dense microstructure that mitigated the aggregate alkali–silica reaction.
Using glass sand as an alternative for quartz sand in UHPC
HighlightsValorization of waste glass in concrete saves its landfills and reduce concrete price.GS with mean particle size 275µm can be used to replace QS in UHPC.GS as QS replacement can yield a UHPC with a dense microstructure.GS as QS replacement can yield a UHPC without any expansion from alkali–silica reaction.
AbstractUltra-high-performance concrete (UHPC) is characterized by a dense microstructure that yields ultra-high strength and durability properties. Quartz sand (QS) with maximum particle sizes of 600μm represents the coarse particles in (UHPC). The QS with optimum grading curve is obtained from crushing coarse sand or rocks, however this is a time-consuming, costly, and polluting process. This paper reports on a study to determine the possibility of producing and using glass sand (GS) for partial or total replacement of QS in UHPC. The results show that GS with a mean particle size (d50) of 275µm could be recommended as an optimal PSD to replace QS particles. The results demonstrate that compressive strength values of about 196 and 182MPa after two days of hot curing can be achieved when replacing 50% and 100% of QS with GS, respectively, compared to 204MPa for reference UHPC containing 100% QS. Incorporating higher replacement rates of GS was shown to produce UHPC of accepted flowability and dense microstructure that mitigated the aggregate alkali–silica reaction.
Using glass sand as an alternative for quartz sand in UHPC
Soliman, Nancy A. (Autor:in) / Tagnit-Hamou, Arezki (Autor:in)
Construction and Building Materials ; 145 ; 243-252
25.03.2017
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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