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- W309201883 abstract "High carbon ferrochrome slags and clay were used to prepare lightweight aggregate (LWA). When burning temperature rose to 1200 °C, the aggregate could get a well expansion. After sintering, different cooling methods were applied and the resulting specimens were investigated with respect to particle strength related to pore structure and phase composition. The results indicated that rapid cooling led to the formation of micro cracks and weakened the material whereas slow cooling enhanced the strength of LWA. The strength of slow cooling aggregate was 5 times higher than that of rapid cooling. The XRD pattern showed that the main phase composition had little difference in both cooling methods. When cooling rapidly, the forsterite with a poor resistance to thermal shock would increase the thermal stress of the samples, then led to the formation of micro-cracks and reduced the strength. While in the slow cooling samples the more complete crystal structure and grain size of Mg-Al spinel did enhance the strength. Furthermore, the connected frame structure formed by pores and substrate during slow cooling provided a strong support to the aggregate strength. While cooling rapidly, pores were in different sizes and distributed unevenly, this phenomenon would reduce strength." @default.
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- W309201883 date "2015-09-01" @default.
- W309201883 modified "2023-10-14" @default.
- W309201883 title "Influence of burning temperature and cooling methods on strength of high carbon ferrochrome slag lightweight aggregate" @default.
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- W309201883 doi "https://doi.org/10.1016/j.conbuildmat.2015.04.045" @default.
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