The low-carbon fertilizer trough concrete is prepared by using solid waste materials such as construction slag and recycled micropowder to meet the needs of various backfill projects.By testing slump,expansion,bleeding rate and compressive strength and other indicators,the working properties and mechanical properties of the material were studied,and a strength prediction model based on the de-sign parameters of mix ratio was established.The results show that increasing the water-binder ratio increases the slump,expansion and bleeding rate,and reduces the strength.When designing the mix ratio,under the premise of meeting the requirements of working properties and mechanical properties,the cement dosage should be preferentially reduced,and the amount of cement should be reduced.For backfill projects that require excavation,the amount of cement should not exceed 50 kg/m3.In addition,recycled micropowder can partially replace fly ash as an admixture for low-carbon fertilizer trough concrete.
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