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- W3037323178 endingPage "105021" @default.
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- W3037323178 abstract "The disposal of hazardous waste cathode ray tubes (CRTs) has become a major environmental concern due to obsolescence of old monitors and their high lead content. Utilizing waste CRT glass to substitute river sand to fabricate eco-friendly ultra-high performance concrete (UHPC) is an appealing recycling and resource conservation option. The superior mechanical properties of eco-friendly UHPC at static loads suggest its potential application in key infrastructures. However, key infrastructures have a high risk of exposing to extreme loads, and the dynamic performance of eco-friendly UHPC under high strain rates is insufficient to withstand extreme loads, impeding its wide application. In this study, the environmental and economic implications of eco-friendly UHPC were evaluated by life cycle assessment and toxicity characteristic leaching procedure. The feasibility of using silane coupling agent (SCA) modified steel fibers to enhance dynamic performance of eco-friendly UHPC was investigated. Results show that recycling waste CRT glass through eco-friendly UHPC significantly reduces the energy consumption, CO2 emissions, human toxicity potential and disposal cost. SCA modified steel fibers are effective in improving peak toughness and energy absorption capacity of eco-friendly UHPC, implying better resistance to dynamic loads. The behind mechanism is the steel fiber-matrix interfacial bond is enhanced by SCA, thus absorbing more energy and delaying interfacial debonding. SCA modification approach can improve the recovery efficiency of waste CRT glass and promote the environmental performance of UHPC. The findings contribute to direct recycling of waste CRT glass and conservation of natural resource with enormous environmental and economic benefits." @default.
- W3037323178 created "2020-07-02" @default.
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- W3037323178 date "2020-11-01" @default.
- W3037323178 modified "2023-10-15" @default.
- W3037323178 title "Dynamic and environmental performance of eco-friendly ultra-high performance concrete containing waste cathode ray tube glass as a substitution of river sand" @default.
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- W3037323178 doi "https://doi.org/10.1016/j.resconrec.2020.105021" @default.
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