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- W3089459780 endingPage "121002" @default.
- W3089459780 startingPage "121002" @default.
- W3089459780 abstract "Nowadays a full understanding of the recycled aggregate concrete (RAC)’s tensile performance is still lack. This creates lots of uncertainty and dangers for actual employing the RAC material, since it has been well known that many structural members’ bearing capacities and responses (such as the cracking load, the shear capacity, the tension-stiffening and the durability) are highly linked with the concrete’s tensile properties. Considering such a situation, two-dimensional multiphase simulations of RAC were conducted in this study with the interface element technique. The main variables of interest were the relative strength of old to new mortar, the adhering content of old mortar, the properties of new and old interfacial transition zones (ITZs) as well as the replacement ratio of recycled aggregates (RAs). For actual employing RAC, the variabilities of the RAC’s tensile properties induced by the spatial location of NAs and RAs is often wished to be known, thus they were also discussed in this study. It can be revealed from the present numerical results that mesoscale models applying the interface element technique are an efficient way to investigate the tensile behaviors of concrete. The tensile strength and elastic modulus of RAC are primarily governed by the properties of new and old ITZs, the strength of the old mortar and its amount. As the strength of the old mortar is weaker than that of the new mortar, a higher replacement ratio of RAs always weakens the tensile properties of the RAC. But if the old mortar strength is as strong or stronger than the new mortar strength, the effect of incorporating RAs is almost negligible. Furthermore, it is also found that the tensile strength variability of RAC caused by the location distribution of coarse aggregates is usually higher than that of natural aggregate concrete." @default.
- W3089459780 created "2020-10-08" @default.
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- W3089459780 date "2021-01-01" @default.
- W3089459780 modified "2023-09-24" @default.
- W3089459780 title "Mesoscale finite element modeling of recycled aggregate concrete under axial tension" @default.
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- W3089459780 doi "https://doi.org/10.1016/j.conbuildmat.2020.121002" @default.
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