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- W2068203246 abstract "The early-stage hydration heat characteristics of the blended binder containing 80% of Portland cement CEM I 42.5 R and 20% of limestone are studied in a dependence on w/c and temperature. The specific hydration heat power and the specific hydration heat are monitored over the time period of 72 h using an isothermal heat flow calorimeter. Experimental results show an active role of limestone in the hydration process. After 72 h its net contribution to the specific hydration heat of the blended binder, QL, is significant for all studied combinations of w/c and temperature. At 20 °C QL is more pronounced for w/c = 0.35 (51.8 J/g-binder) than w/c = 0.50 (41.8 J/g-binder), contrary to 35 °C where a dependence of QL on w/c is not evidenced (34.6 J/g-binder for w/c = 0.35 and 35.5 J/g-binder for w/c = 0.50). Unlike the reference Portland cement, the apparent activation energy of the analyzed Portland-limestone cement is found to depend on w/c; for w/c = 0.5 it is 35.7 kJ/mol while for w/c = 0.35 only 28.0 kJ/mol." @default.
- W2068203246 created "2016-06-24" @default.
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- W2068203246 date "2014-01-01" @default.
- W2068203246 modified "2023-10-05" @default.
- W2068203246 title "Effect of w/c and temperature on the early-stage hydration heat development in Portland-limestone cement" @default.
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- W2068203246 doi "https://doi.org/10.1016/j.conbuildmat.2013.09.020" @default.
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