橡胶-钢纤维混掺碾压混凝土的力学性能研究

发布时间：2018-01-11 22:07

本文关键词：橡胶-钢纤维混掺碾压混凝土的力学性能研究　出处：《混凝土》2017年11期 　论文类型：期刊论文

【摘要】：探讨了橡胶粒和钢纤维混合掺入对碾压混凝土力学性能的影响及规律。橡胶粒等体积替代砂,掺量分别为5%、10%、15%、20%,钢纤维体积掺量分别为1.0%、1.3%、1.6%、2.0%。结果表明:相同钢纤维掺量下,随着橡胶颗粒掺量的增加,碾压混凝土的抗折强度与抗压强度均先增加后降低,橡胶粒10%时强度最高。相同橡胶颗粒掺量下,随着钢纤维掺量的增加,碾压混凝土的抗压强度先增加后降低,之后又出现了不同程度的增加。橡胶颗粒掺量为5%、10%时,碾压混凝土的抗折强度的变化规律与抗压强度一致,但掺量为15%、20%时抗折强度只有先增加后降低的趋势,后期未出现回升,钢纤维1.3%时强度最高。经试验,钢纤维1.3%、橡胶粒10%掺量组合的强度最优。
[Abstract]:The influence of rubber particle and steel fiber on the mechanical properties of roller compacted concrete is discussed. The volume content of steel fiber is 1.0 / 1.3 / 1.6 / 2.0.The results show that the content of rubber particles increases with the same amount of steel fiber. The flexural strength and compressive strength of RCC increased first and then decreased, and the strength of RCC was the highest at 10. Under the same amount of rubber particles, with the increase of steel fiber content. The compressive strength of RCC first increases and then decreases, then increases to varying degrees. When the rubber particle content is 5, 10, the change of RCC flexural strength is consistent with that of RCC. However, the flexural strength increased first and then decreased at 20s, but did not rise again at the later stage. The strength of steel fiber was the highest at 1.3. the test showed that the strength of steel fiber was 1.3%. The strength of rubber particle 10% was optimal.
【作者单位】：北京航空航天大学交通科学与工程学院;
【基金】：国家自然科学基金资助项目(51378042)
【分类号】：TU528
【正文快照】： 0引言碾压混凝土是一种水灰比小、坍落度接近零、密实性及强度较高的干硬性混凝土。依据已有的科研成果,国内外已将碾压混凝土应用于公路、铁路、大坝、工业民用建筑等领域[1]。与塑性混凝土相比,碾压混凝土具有快速搅拌施工、水泥用量少、节约工程造价、抗冻性及耐久性好等特

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