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研究了不同掺量的纳米CaCO_3对混凝土力学性能的影响。结果表明:在1.0%～1.5%的体积掺量范围内效果最佳,能有效提高混凝土的抗压和抗折强度。当纳米CaCO,掺量为1.5%时,其3d抗压强度比基准混凝土提高了3.9%,抗折强度提高13.5%;7d抗压强度提高了7.5%,抗折强度提高了14.0%;28d抗压强度提高了5.6%,抗折强度提高了6.6%。并对纳米CaCO_3提高混凝土力学性能的机理进行了分析。
The effect of nano-CaCO3 on the mechanical properties of concrete was studied. The results show that the best effect in the range of 1.0% ~ 1.5% volume content can effectively improve the compressive strength and flexural strength of concrete. When the content of nano-CaCO 3 was 1.5%, the compressive strength of 3d was 3.9% higher than that of standard concrete and the flexural strength was increased by 13.5%. The compressive strength of 7d was increased by 7.5% and the flexural strength was increased by 14.0% Compressive strength increased by 5.6%, flexural strength increased by 6.6%. The mechanism of improving the mechanical properties of concrete by nano-CaCO_3 was also analyzed.