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- W13060247 abstract "Compared to normally vibrated concrete (NVC), self-compacting concrete(SCC) possesses enhanced qualities and improves productivity and workingconditions due to the elimination of compaction. SCC generally has a higherpowder content than NVC and thus it is necessary to replace some of the cementby additions to achieve an economical and durable concrete.The established benefits of using low volumes of fly ash in SCC, high volumesof fly ash in NVC and the search for uses of waste glass led to the research onthe possibilities of use higher fly ash contents than hitherto and ground glass asan addition in SCC whilst maintaining satisfactory properties.Mix design methods, tests, target properties and constituent materials wereselected. This was followed by investigating the influence of fly ash and groundglass on the mortar fraction of the SCC and then using these results to produceconcrete mixes with the target fresh properties. Hardened concrete of thesemixes were measured and the relationships between these investigated.The results show that for constant filling ability of the SCC, replacement ofcement with fly ash or ground glass requires an increase in water/powder ratioand a reduction in superplasticiser dosage. Both additions degraded the passingability, consistence retention and hardened properties but not to a prohibitiveextent. SCC with up 80% cement replaced by fly ash or glass volume ratio of6.4% is possible and the material properties of SCC are similar to those of NVC.Also the UCL method of mix design was extended to higher coarse aggregatecontents and different additions.The project can lead to the use of higher volume fly ash and ground glass inSCC, thus widening the types of additions available for SCC, saving landfill andreduce CO2 emissions by the use of less cement." @default.
- W13060247 created "2016-06-24" @default.
- W13060247 creator A5042569695 @default.
- W13060247 date "2009-12-01" @default.
- W13060247 modified "2023-09-26" @default.
- W13060247 title "Wider application of additions in self-compacting concrete" @default.
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