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MANUFACTURING METHOD OF FLY ASH WITH HIGH PERFORMANCE FOR LOW HEAT MIXING CEMENT
MANUFACTURING METHOD OF FLY ASH WITH HIGH PERFORMANCE FOR LOW HEAT MIXING CEMENT
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机译:低热掺量水泥高性能粉煤灰的制造方法
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摘要
The present invention can improve the initial strength development of low-heat-mixing mixed cement while improving the low hydration heat development characteristics and durability by replacing fly ash, which is a raw material of low heat-generating mixed cement, with fly ash discharged from a circulating fluidized bed boiler, The present invention provides a production method capable of producing a high-performance fly ash for an effective low-heat-mixing mixed cement while overcoming disadvantages of an exothermic mixed cement. The method for producing fly ash for low heat-generating mixed cement according to an embodiment of the present invention includes: a pulverizing step of pulverizing fly ash discharged from a thermal power plant of a circulating fluidized bed combustion system using coal as a raw material to a predetermined powder; A partial digestion step in which water is added to the fly ash after the pulverization step to cause volume expansion; And a mixing step of mixing the fly ash having been subjected to the partial digestion step with the refinery so that the fly ash is contained in an amount of 5 to 25% by weight based on the total weight of the refined ash, and the refined ash is contained in an amount of 75 to 95% .
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