Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Novel lightweight concrete containing manufactured plastic aggregate
HighlightsInnovative concrete was produced using novel manufactured plastic aggregate.The effect of replacing natural aggregate with manufactured aggregate was examined.The mechanical properties of concrete decreased with increasing replacement level.The ductility of concrete increased with increasing replacement level.Models were proposed to predict the mechanical properties of the novel concrete.
AbstractPlastic waste and its low recycling rate make a significant contribution towards the pollution of the environment. It is therefore essential that plastic waste is utilised in different applications, such as aggregates in concrete. In this paper, an investigation of a manufactured plastic aggregate as a replacement for volcanic lightweight aggregate and Lytag aggregate in concrete is presented. The influence of replacement level on the fresh, hardened and microstructure properties of concrete was investigated. The slump, compressive strength, flexural strength, splitting tensile strength and elastic modulus decreased with the increase in replacement level. Neither the fresh density nor the hardened density was significantly affected by replacement level. The Lytag and conventional lightweight concrete mixes had a brittle failure; whereas the concrete mixes incorporating the manufactured plastic aggregate had a ductile post-peak behaviour. The results suggest that the concrete mix containing the manufactured plastic aggregate at a replacement level of 25% can be used in structural and non-structural applications requiring moderate strength and ductility. Predictive models were proposed and demonstrated to be in good agreement with the experimental results for the mechanical properties of the concrete mixes incorporating the manufactured plastic aggregate.
Novel lightweight concrete containing manufactured plastic aggregate
HighlightsInnovative concrete was produced using novel manufactured plastic aggregate.The effect of replacing natural aggregate with manufactured aggregate was examined.The mechanical properties of concrete decreased with increasing replacement level.The ductility of concrete increased with increasing replacement level.Models were proposed to predict the mechanical properties of the novel concrete.
AbstractPlastic waste and its low recycling rate make a significant contribution towards the pollution of the environment. It is therefore essential that plastic waste is utilised in different applications, such as aggregates in concrete. In this paper, an investigation of a manufactured plastic aggregate as a replacement for volcanic lightweight aggregate and Lytag aggregate in concrete is presented. The influence of replacement level on the fresh, hardened and microstructure properties of concrete was investigated. The slump, compressive strength, flexural strength, splitting tensile strength and elastic modulus decreased with the increase in replacement level. Neither the fresh density nor the hardened density was significantly affected by replacement level. The Lytag and conventional lightweight concrete mixes had a brittle failure; whereas the concrete mixes incorporating the manufactured plastic aggregate had a ductile post-peak behaviour. The results suggest that the concrete mix containing the manufactured plastic aggregate at a replacement level of 25% can be used in structural and non-structural applications requiring moderate strength and ductility. Predictive models were proposed and demonstrated to be in good agreement with the experimental results for the mechanical properties of the concrete mixes incorporating the manufactured plastic aggregate.
Novel lightweight concrete containing manufactured plastic aggregate
Alqahtani, Fahad K. (Autor:in) / Ghataora, Gurmel (Autor:in) / Khan, M. Iqbal (Autor:in) / Dirar, Samir (Autor:in)
Construction and Building Materials ; 148 ; 386-397
03.05.2017
12 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
CA , coarse aggregate , <italic>E<inf>c</inf></italic> , modulus of elasticity , FA , fine aggregate , ITZ , interfacial transition zone , LAC , concrete made using Lytag aggregate , LWA , conventional volcanic lightweight aggregate , LWC , concrete made using conventional lightweight aggregate (LWA) , LYA , Lytag aggregate , RP2F1A , recycled plastic aggregate made using 30% LLDPE and 70% red or dune sand , RP2F1C , concrete made using recycled plastic aggregate (RP2F1A) , RP2F1C25 , the concrete mix containing RP2F1A at a replacement level of 25% , RP2F1C50 , the concrete mix containing RP2F1A at a replacement level of 50% , RP2F1C75 , the concrete mix containing RP2F1A at a replacement level of 75% , RP2F1C100 , the concrete mix containing RP2F1A at a replacement level of 100% , RPAs , recycled plastic aggregates , SLA , synthetic lightweight aggregate , W/C , water to cement ratio , WPLA , waste PET lightweight aggregate , <italic>f<inf>c</inf></italic> , cylinder compressive strength , <italic>f<inf>r</inf></italic> , flexural strength , <italic>f<inf>t</inf></italic> , splitting tensile strength , <italic>γ<inf>w</inf></italic> , dry density , Plastic waste , Recycled plastic aggregate , Lightweight aggregate , Lightweight concrete , Mechanical properties , SEM , Correlations
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