Maintenance of superhydrophobic concrete for high compressive strength
- PDF / 2,822,757 Bytes
- 11 Pages / 595.276 x 790.866 pts Page_size
- 88 Downloads / 266 Views
Maintenance of superhydrophobic concrete for high compressive strength Shenzhuang Ren1, Yang Chen1, Kun Xu1, Jiyu Liu1, Jing Sun1, Danyang Zhao1, Siying Ling1,*, Jinlong Song1,* , and Shungang Hua1,* 1
School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, People’s Republic of China
Received: 8 September 2020
ABSTRACT
Accepted: 9 November 2020
Concrete is often used in building, bridges, dams, roads and other infrastructures. However, the porosities and natural hydrophilicity of concrete often induce the damage of the concrete architecture or other disasters. Endowing the concrete with superhydrophobicity can effectively improve the antifreeze–thaw, anti-corrosion and anti-icing properties and expand the application prospect of concrete in the modern construction industry. Despite all this, the compressive strength of superhydrophobic concrete is not high enough, limiting its application. Here, we maintained superhydrophobic concrete for 28 days and improved the compressive strength for 3.5 times from 10 MPa to 34.48 MPa. The main mechanism is that calcium silicate hydrate structures grow with the increase in maintenance time and make the inside microstructures connected more closely. In addition, XPS spectra were also collected to investigate the chemical compositions of the superhydrophobic concrete. A series of tests were carried out on superhydrophobic concrete and indicated that the superhydrophobic concrete after maintenance had high surface robustness, anti-corrosion property and high anti-icing and deicing capacity, showing the application value.
Ó
Springer Science+Business
Media, LLC, part of Springer Nature 2020
Introduction Concrete is widely used in buildings, bridges, dams and other civil engineering due to its outstanding plasticity, durability and low cost [1, 2]. However, the porosities and natural hydrophilicity of concrete
often induce the damage of the concrete architecture [3]. For example, corrosive ions from sea or saline soil can enter into the inside of concrete with water, which will corrode the steel bar and significantly reduce the strength and carrying capacity of the reinforced concrete [4, 5]. In addition, low strength of concrete caused by corrosive liquid often causes
Handling Editor: M. Grant Norton. Shenzhuang Ren and Yang Chen have contributed equally.
Address correspondence to E-mail: [email protected]; [email protected]; [email protected]
https://doi.org/10.1007/s10853-020-05558-7
J Mater Sci
modern architecture such as buildings and bridges to collapse in some particular cases, which significantly affect human’s life safety. These problems, for decades, have been the growing challenges worldwide in maintaining the condition of civil engineering structures and thus ensuring reliability, safety and sustainability of these infrastructures. How to improve the corrosion resistance of concrete while maintaining high strength has been a research hotspot in recent years. As we all know, reducing the contact and permeation of corrosiv
Data Loading...
