Research on the influence of mineral admixtures on the performance of high strength pumped concrete
This article investigates the effects of three mineral admixtures,namely mineral powder,fly ash,and silica fume,on the per-formance of high-strength pumped concrete through experiments.The research results show that the type and dosage of admixtures will have an impact on the rheological properties and pumping performance of high-strength pumped concrete.The addition of mineral pow-der will increase the slump and expansion of high-strength pumped concrete,reduce the viscosity and yield shear stress of fresh con-crete,and improve the fluidity of high-strength pumped concrete.The addition of 20%fly ash or 5%silica fume can effectively im-prove the fluidity of concrete,but when the content of fly ash and silica fume is high,it will have adverse effects on the fluidity of high-strength pumped concrete.The addition of mineral powder and 5%silica fume can improve the pumping efficiency of high-strength concrete.If the addition of fly ash and silica fume exceeds 10%,it will reduce the pumping efficiency of high-strength concrete.In ad-dition,the pumping performance of high-strength concrete is sensitive to silica fume,and the pumping performance of high-strength concrete can be adjusted by adjusting the amount of silica fume added.
Mineral admixtureshigh strength pumped concretefly ashmineral powdersilica fume
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