THE INFLUENCE OF MINERAL ADMIXTURES ON THE RESISTANCE OF CONCRETE TO COMBINED EROSION
The effectiveness of mineral admixtures on concrete's resistance to sulphate-chloride compound erosion is investigated by adding fly ash and silica fume.The changes of compressive strength,mass loss rate,and dynamic elastic modulus loss of concrete after several dry and wet cycles are analyzed.Combining with XRD,SEM,and indus-trial CT characterization methods,the influence mechanism of two kinds of mineral admixtures on composite erosion resistance is revealed.The results show that the addition of fly ash and silica fume significantly improve the micro-structure and macroscopic properties of concrete,which reduces the number of harmful pores,resulting in the durabil-ity improvement of the material.The mineral admixture effectively improves the performance of concrete in sul-phate-chloride compound erosion environment through the dual mechanism of physical filling and chemical reactions.
mineral admixturessulfate-chloridecombined aggressionmass loss rate
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