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- W2386987829 abstract "A novel ecological expansive agent was prepared using magnesite tailings and dolomite tailings.The agent is used for concrete to compensate the shrinkage of dam concrete caused by temperature stress.The expansion properties of paste mixed with different proportions of expansive agents and fly ash were investigated at different hydration ages,and the trend of expansion ratio changes occurred in water at 20 ℃ and 60 ℃ were also explored.Results showed that expansive agents is produced by burning at 950-1050 ℃,holding for 1-1.5 h,and natural cooling in air.When the amount of expansive agents is in certain circumstances,the higher CaO,the higher the early expansion is and the smaller the late expansion is,the higher MgO,the smaller the early expansion is and the higher the late expansion is.The higher the hydration temperature,the higher the expansion at the same age is.The expansion performance of MgO and CaO is suppressed by increasing quantity of fly ash." @default.
- W2386987829 created "2016-06-24" @default.
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- W2386987829 date "2011-01-01" @default.
- W2386987829 modified "2023-09-23" @default.
- W2386987829 title "Research on the Expansion of Cement Paste Mixed with Ecological Expansive Agents" @default.
- W2386987829 hasPublicationYear "2011" @default.
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