![](/images/graphics-bg.png)
Mechanical Properties Improvement Mechanism of Silica Fume-Modified Ultrafine Cement Used to Repair Pavement Microcracks
Joint Authors
Wang, Xiao-fei
Li, Xin-wei
Guo, Yinchuan
Yao, Jiangbei
Shen, Aiqin
Pu, HuaQiao
Source
Advances in Materials Science and Engineering
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-10-17
Country of Publication
Egypt
No. of Pages
10
Abstract EN
With heavy modern traffic and natural factors, cement concrete pavement cracks have become increasingly serious.
However, most existing inorganic repair materials for cement concrete pavement cracks have low interfacial bonding strength.
Ultrafine cement, silica fume (SF), and other admixtures, which are superfine and used to repair fine early cracks, are prepared as the mending material in our research.
Compression strength, bending strength, and interfacial bonding strength are studied, and modification mechanisms are discovered by using a powder X-ray diffraction test, thermal analysis, and micromorphology observation.
The result shows that mechanical strength of the stable period is improved with the right amount of mixing of SF, which leads to secondary pozzolanic reaction and makes the microstructure of the paste denser.
Meanwhile, a large amount of Ca(OH)2 and water in the interface area are consumed by the secondary pozzolanic reaction, which brings out good interfacial effects with no water film between the new paste and existing concrete.
Our experiments show that the pastes with 3–5% SF have better bending strength (15%∼17% improvement) and compressive strength (7%∼9% improvement).
Interfacial bonding strength is also increased with a certain amount of SF.
Tensile shear bonding strength has been improved more than 4 times when SF dosage is more than 3%.
Thus, we recommend a paste with 5% SF as the best mixture to be used to repair cracks.
American Psychological Association (APA)
Wang, Xiao-fei& Yao, Jiangbei& Li, Xin-wei& Guo, Yinchuan& Shen, Aiqin& Pu, HuaQiao. 2018. Mechanical Properties Improvement Mechanism of Silica Fume-Modified Ultrafine Cement Used to Repair Pavement Microcracks. Advances in Materials Science and Engineering،Vol. 2018, no. 2018, pp.1-10.
https://search.emarefa.net/detail/BIM-1120869
Modern Language Association (MLA)
Wang, Xiao-fei…[et al.]. Mechanical Properties Improvement Mechanism of Silica Fume-Modified Ultrafine Cement Used to Repair Pavement Microcracks. Advances in Materials Science and Engineering No. 2018 (2018), pp.1-10.
https://search.emarefa.net/detail/BIM-1120869
American Medical Association (AMA)
Wang, Xiao-fei& Yao, Jiangbei& Li, Xin-wei& Guo, Yinchuan& Shen, Aiqin& Pu, HuaQiao. Mechanical Properties Improvement Mechanism of Silica Fume-Modified Ultrafine Cement Used to Repair Pavement Microcracks. Advances in Materials Science and Engineering. 2018. Vol. 2018, no. 2018, pp.1-10.
https://search.emarefa.net/detail/BIM-1120869
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1120869