石墨和碳纤维掺量对混凝土宏观性能的影响

发布时间：2018-04-05 04:19

本文选题：石墨　切入点：碳纤维　出处：《建筑结构》2017年21期

【摘要】：主要研究不同掺量的石墨和碳纤维对混凝土宏观性能的影响,测试了导电混凝土的28d抗压强度、电阻率和工作性。结果显示碳纤维能够提高混凝土抗压强度,但其影响十分有限。在500目石墨中增加碳纤维的掺量能明显提高混凝土的导电性;掺入5 000目石墨比掺入500目石墨更能提高混凝土的强度和导电性;加入碳纤维之后,石墨粒径的变化对混凝土的强度基本没有影响,但对混凝土导电性的影响却不可忽略;在水灰比和导电相掺量相同的条件下,掺入5 000目石墨的混凝土比掺入500目石墨的混凝土的工作性更好。
[Abstract]:The effects of graphite and carbon fiber on the macroscopic properties of concrete were studied. The 28d compressive strength, resistivity and workability of conductive concrete were tested.The results show that carbon fiber can improve the compressive strength of concrete, but its influence is very limited.Adding carbon fiber to 500 mesh graphite can obviously improve the conductivity of concrete, adding 5 000 mesh graphite can improve the strength and conductivity of concrete more than 500 mesh graphite, after adding carbon fiber,The change of graphite particle size has no effect on the strength of concrete, but the influence on the conductivity of concrete can not be ignored.The workability of concrete with 5,000 mesh graphite is better than that with 500 mesh graphite.
【作者单位】：中国电力科学研究院;国网青海省电力公司;清华大学土木工程系;
【基金】：国网依托工程基建新技术研究项目(GCB11201602754)
【分类号】：TU528

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