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- W2079106169 abstract "A comparative analysis of various RCC mixtures made with two different fineness levels of fly ash, various fly ash contents ranging from 0 to 85 percent, different nominal maximum size of aggregates (NMSA) and chemical admixture was conducted. Using commonly used soil-analogy method, a total of 32 optimized including cement replaced by fly ash mixtures were studied for fresh properties like density, air content and Vee Bee time (VBT). The influences of the mixture variables viz. fly ash and NMSA on the bulk mechanical characteristics were analyzed. The concept of embrittlement ratio (defined as the ratio of compressive to tensile strength) has been used to understand the progress of tensile strength development of mixtures. Using the notion of specific strength (normalized over the binders' content), the competent contributions of cementitious and pozzolanic effects to the compressive, flexural and split tensile strengths were measured. The research findings show that (1) Initially, cement alone contributes to strength with no or negative contribution by pozzolanic effect, which gradually strengthens with age; (2) Increasing the fineness of fly ash and/or NMSA improves its mechanical performance as it performs better than the relatively coarser fly ash; (4) The contribution rate of pozzolanic action gradually increases with strength contributions reaching values close to and above 50 percent, with a distinctly pronounced behavior in flexural strength; (5) With increasing age, the embrittlement ratios increase, showing improved tensile performance; (6) In conclusion, fly ash in the range of 25–65 percent could be used effortlessly for various pavement applications for achieving better performing, more economical and environmentally friendly pavement systems." @default.
- W2079106169 created "2016-06-24" @default.
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- W2079106169 date "2006-04-28" @default.
- W2079106169 modified "2023-10-16" @default.
- W2079106169 title "Optimizing Mix Proportions of Roller Compacted Concrete for Pavement Applications in Indian Conditions" @default.
- W2079106169 doi "https://doi.org/10.1061/40838(191)46" @default.
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