The Counterbalance of the Adverse Effect of Abrasion on the Properties of Concrete Incorporating Nano-SiO2 and Polypropylene Fiber Based on Pore Structure Fractal Characteristics
The Counterbalance of the Adverse Effect of Abrasion on the Properties of Concrete Incorporating Nano-SiO2 and Polypropylene Fiber Based on Pore Structure Fractal Characteristics
复制标题
基于孔结构分形特征的磨损对纳米SiO2与聚丙烯纤维混凝土性能不利影响的抵消
DOI：
10.3390/fractalfract6070392
复制
发表时间：
2022-07
期刊：
影响因子：
--
通讯作者：
Qingxin Meng
中科院分区：
文献类型：
--
作者：
Kun Wang;Jinjun Guo;Peng Zhang;Qingxin Meng
磨蚀破坏是一种典型的水工建筑物破坏形式，对建筑物的耐久性有很大影响。在严重的情况下，它甚至可以阻止水工建筑物的正常使用和运行。因此，鉴于其不可避免的特性，研究更耐用，廉价，安全和生态友好的耐磨液压系统是必不可少的。为此，选取5种纳米SiO2掺量和3种纤维掺量，评价分析了纳米SiO2和聚丙烯纤维对混凝土耐磨性的改性效果。基于抗磨损强度表征了混凝土性能的演变。利用X射线衍射和扫描探针显微镜对样品的矿物组成和显微结构进行了分析。采用压汞法测定了混凝土的孔结构参数，如孔径分布和分形特征。结果表明，纳米SiO2通过致密混凝土孔结构和促进水化产物的形成，提高了混凝土的耐磨性。结果表明，纤维掺量过大会导致混凝土中纤维团聚，形成疏松的孔隙结构，从而影响混凝土的抗压强度。混凝土孔结构的分形维数与混凝土的耐磨强度有密切的关系。这些研究结果的影响通知水利工程结构的耐磨蚀设计。
Abrasion damage is a typical hydraulic structure failure and considerably impacts the durability of buildings. In severe circumstances, it can even prevent hydraulic structures from being used and operated normally. Thus, it is essential to research abrasion-resistant hydraulic systems that are more durable, inexpensive, safe, and ecologically friendly, given its unavoidable characteristics. In this context, five dosages of nano-SiO2 and three dosages of fibers are selected to evaluate and analyze the modification effect of nano-SiO2 and polypropylene fibers on the abrasion resistance of concrete. The evolution of the concrete properties was characterized based on the abrasion resistance strength. Moreover, the mineralogical composition and microstructure characterization were investigated through X-ray diffraction and scanning probe microscope. Mercury intrusion porosimetry was applied to determine the pore-structure parameters of concrete, such as pore-size distribution and the fractal characteristics. The results indicate that nano-SiO2 improves the abrasion resistance of concrete by densifying the pore structure and promoting the formation of hydration products. Results reveal that the excessive dosage of fibers agglomerates in the concrete to form an unsubstantial pore structure due to poor dispersibility. The fractal dimension of the pore structure exhibits a close relationship with the abrasion resistance strength of concrete. The implications of these findings inform the design of abrasion and erosion resistance for hydraulic engineering structures.
登录
查看更多内容
影响因子：
5.4
作者：
Gleb Vodinchar -Gleb-Vodinchar -2170461579;L. Feshchenko
通讯作者：
Gleb Vodinchar -Gleb-Vodinchar -2170461579;L. Feshchenko
影响因子：
5.4
作者：
G. Ma;Jiangteng Li;Xiaoping Zhou;Lianying Zhang;Pei-tao Qiu;Yang Yu
通讯作者：
G. Ma;Jiangteng Li;Xiaoping Zhou;Lianying Zhang;Pei-tao Qiu;Yang Yu
影响因子：
13.1
作者：
Garcia-Taengua, E.;Sonebi, M.;Khatib, J.
通讯作者：
Khatib, J.
DOI：
--
发表时间：
2018
期刊：
--
影响因子：
--
作者：
Michael Smith;David Brink
通讯作者：
Michael Smith;David Brink
影响因子：
3.4
作者：
Wenqiang Wang;Xinhao Liu;Liang Guo;P. Duan
通讯作者：
Wenqiang Wang;Xinhao Liu;Liang Guo;P. Duan