纳米材料对混凝土耐久性和功能性影响研究

发布时间：2018-03-15 03:19

本文选题：混凝土　切入点：纳米材料　出处：《水利水电技术》2017年09期 　论文类型：期刊论文

【摘要】：为了探究纳米混凝土耐久性和功能性研究的进展与困境,对不同种类纳米材料对混凝土耐久性和功能性的影响进行了分类整理和分析,并对纳米材料在混凝土中的应用前景进行了展望。研究发现:(1)纳米材料可以有效改善混凝土孔隙结构,并且参与混凝土水化,从而提高混凝土的抗冻、抗渗、抗冲磨、抗腐蚀等耐久性能;(2)纳米材料的掺入还可以使混凝土产生压敏导电性能、光催化自清洁性能以及电磁屏蔽性能,具有广阔的应用前景;(3)目前纳米混凝土存在纳米材料造价较高且过量掺加会使优化效果降低的问题。因此,从经济和性能两方面考虑,纳米材料在混凝土中的掺加存在一个最优掺量。最后给出了两个典型工程案例介绍纳米混凝土在水工建筑物中的成功应用,为纳米材料在混凝土中的应用提供有价值的参考。
[Abstract]:In order to explore the progress and predicament of the research on durability and function of nanocrystalline concrete, the effects of different kinds of nano-materials on durability and function of concrete were sorted out and analyzed. The application prospect of nanomaterials in concrete is prospected. It is found that nanomaterials can effectively improve the pore structure of concrete and participate in the hydration of concrete, thus improving the frost resistance, impermeability and abrasion resistance of concrete. The addition of nanomaterials can also produce pressure sensitive conductivity, photocatalytic self-cleaning and electromagnetic shielding properties of concrete. Nano-concrete has the problem of high cost of nanomaterials and excessive addition of nanomaterials will reduce the optimization effect. Therefore, considering from the aspects of economy and performance, At last, two typical engineering cases are given to introduce the successful application of nanocrystalline concrete in hydraulic structures, which provides a valuable reference for the application of nanomaterials in concrete.
【作者单位】：郑州大学水利与环境学院;中国水利水电科学研究院流域水循环模拟与调控国家重点实验室;
【基金】：国家“973”计划(2013CB035901) 国家自然科学基金项目(51409284,51309203) 中国水科院流域水循环模拟与调控国家重点实验室基金(IWHR-SKL-201412,水科院资助课题1675,IWHR-SKL-201512)
【分类号】：TV431

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