An admixture was prepared using N-hydroxymethacrylamide aqueous solution and serpentine powder with a particle size of 0.08～0.10 mm,and the properties of serpentine concrete after high temperature were studied.The results indicate that the serpentine concrete mixed with N-hydroxymethylacrylamide serpentine powder composite admixture has good high-temperature radiation resistance.The N-hydroxymethylacrylamide serpentine powder composite admixture can improve the axial compressive strength of serpentine concrete before and after high temperature,and also enhance the stability of mechanical properties after high temperature.
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