scholarly journals Evaluation of the Uniformity of Protective Coatings on Concrete Structure Surfaces Based on Cluster Analysis

Sensors ◽  
2021 ◽  
Vol 21 (16) ◽  
pp. 5652
Author(s):  
Dunwen Liu ◽  
Wanmao Zhang ◽  
Yu Tang ◽  
Yinghua Jian ◽  
Chun Gong ◽  
...  
Keyword(s):  
Cluster Analysis ◽  
Surface Coating ◽  
Evaluation Method ◽  
Protective Coatings ◽  
Concrete Surface ◽  
Distribution Data ◽  
Positive Contribution ◽  
Infrared Images ◽  
Coating Uniformity ◽  
Durability Of Concrete

With the continuous development of urbanization and industrialization in the world, concrete is widely used in various engineering constructions as an engineering material. However, the consequent problem of durability of concrete structures is also becoming increasingly prominent. As an important additional measure, a protective coating can effectively improve the durability of concrete performance. Moreover, the uniformity of the concrete surface coating will directly affect its protective effect. Therefore, we propose a nondestructive inspection and evaluation method of coating uniformity based on infrared imaging and cluster analysis for concrete surface coating uniformity detection and evaluation. Based on the obtained infrared images, a series of processing and analysis of the images were carried out using MATLAB software to obtain the characteristics of the infrared images of the concrete surface. Finally, by extracting the temperature distribution data of the pixel points on the concrete surface, an evaluation method of concrete surface coating uniformity based on a combination of cluster analysis and hierarchical analysis was established. The evaluation results show that the determination results obtained by this method are consistent with the actual situation. This study has a positive contribution to the testing of concrete surface coating uniformity and its evaluation.

scholarly journals Evaluation of the Uniformity of Protective Coatings on Concrete Structure Surfaces Based on Cluster Analysis

2021 ◽  
Author(s):  
Dunwen Liu ◽  
Wanmao Zhang ◽  
Yu Tang ◽  
Yinghua Jian ◽  
Chun Gong ◽  
...  
Keyword(s):  
Cluster Analysis ◽  
Surface Coating ◽  
Evaluation Method ◽  
Protective Coatings ◽  
Concrete Surface ◽  
Distribution Data ◽  
Positive Contribution ◽  
Infrared Images ◽  
Coating Uniformity ◽  
Durability Of Concrete

With the continuous development of urbanization and industrialization in the world, concrete is widely used in various engineering constructions as an engineering material. However, the consequent problem of durability of concrete structures is also becoming increasingly prominent. As an important additional measures, protective coating can effectively improve the durability of concrete performance. Moreover, the uniformity of the concrete surface coating will directly affect its protective effect. Therefore, we propose a nondestructive inspection and evaluation method of coating uniformity based on infrared imaging and cluster analysis for concrete surface coating uniformity detection and evaluation. Based on the obtained infrared images, a series of processing and analysis of the images were carried out using MATLAB software to obtain the characteristics of the infrared images of concrete surface. Finally, by extracting the temperature distribution data of the pixel points on the concrete surface, an evaluation method of concrete surface coating uniformity based on a combination of cluster analysis and hierarchical analysis was established. The evaluation results show that the determination results obtained by this method are consistent with the actual situation. This study has a positive contribution to the testing of concrete surface coating uniformity and its evaluation.

scholarly journals Durability Evaluation Method Focused on Bond Property of Concrete Surface Coating System

2012 ◽  
Vol 61 (10) ◽  
pp. 831-836
Author(s):  
Takuji YAMADA ◽  
Yoichi TSUKUDA ◽  
Takashi YAMAMOTO ◽  
Minoru KUNIEDA ◽  
Toyoaki MIYAGAWA
Keyword(s):  
Surface Coating ◽  
Evaluation Method ◽  
Concrete Surface ◽  
Coating System ◽  
Bond Property

scholarly journals Evaluation for Durability of Concrete Surface Coating Method from the Viewpoint of Adhesion Performance of Coating Films

2011 ◽  
Vol 60 (8) ◽  
pp. 715-720 ◽  
Author(s):  
Takuji YAMADA ◽  
Yoichi TSUKUDA ◽  
Kaname KATSUI ◽  
Yoshihiko WATANABE ◽  
Toyoaki MIYAGAWA
Keyword(s):  
Surface Coating ◽  
Concrete Surface ◽  
Coating Films ◽  
Coating Method ◽  
Adhesion Performance ◽  
Durability Of Concrete

scholarly journals Effects of Anti-Graffiti Protection on Concrete Durability

2014 ◽  
Vol 634 ◽  
pp. 517-526 ◽  
Author(s):  
Elsa Neto ◽  
Ana Souto ◽  
Aires Camões ◽  
Arlindo Begonha ◽  
Paulo Cachim
Keyword(s):  
Water Absorption ◽  
Atmospheric Pressure ◽  
Surface Characteristics ◽  
Concrete Surface ◽  
Experimental Program ◽  
Concrete Durability ◽  
Protection Systems ◽  
Before And After ◽  
Paint Removal ◽  
Durability Of Concrete

The heritage of fair-faced concrete, largely built in the twentieth century and nowadays recognized as heritage to be protected, is susceptible to attacks by graffiti, a form of vandalism that causes a major social and economic impact on society. Concrete is a porous material sometimes deteriorated over the years, and the interactions between the inks and the substrate and removal methods sometimes deteriorate or alter the concrete surface, especially if it is necessary to repeat the removal process. The anti-graffiti products are applied on the surface of the concrete, hindering the adhesion of paints or preventing its penetration into the pores of concrete, which in turn facilitates their removal. However, it appears that many of the existing protective products on the market may also alter the surface characteristics of the concrete irreversibly. Considering that the durability of concrete depends on the composition and characteristics of the surface, it is essential to know the effects of anti-graffiti protection systems on the durability of concrete and adopt the appropriate methodology to preserve this heritage. Thus, an experimental program was developed for analyzing changes in durability indicators and surface properties that protect concrete from deterioration (i) concrete without protection before and after application of spray paint, (ii) concrete with protection before and after application of spray paint and (iii) after paint removal were studied. Two anti-graffiti products were evaluated: a permanent and a sacrificial one. Effects of the anti-graffiti systems on the concrete durability are investigated and the tests performed include: water absorption by capillary and immersion at atmospheric pressure. The results of the water absorption tests show that the graffiti protection reduces the water absorption into the concrete and facilitates the removal of the graffiti without affecting negatively the characteristics of the surface and thus contributing to improve its durability.

The Application of Fuzzy Synthesis Evaluation Method on Assessing Bridge Durability

2012 ◽  
Vol 594-597 ◽  
pp. 1033-1037
Author(s):  
Fei Zheng ◽  
Yu Wang ◽  
Pu Yang Zhang
Keyword(s):  
Evaluation Method ◽  
Concrete Bridges ◽  
Service Performance ◽  
Fuzzy Mathematics ◽  
Factors Affecting ◽  
Index Model ◽  
Design Requirements ◽  
The Difference ◽  
Fuzzy Synthesis Evaluation ◽  
Durability Of Concrete

Assessment of the structure durability of concrete bridge in service is crucial for determining whether their service performance is meeting the design requirements or not. In this paper we classify the whole structure of bridge into two levels, i.e.bridge structure and bridge components. A two-level-multi-index model for evaluating the durability of concrete bridges in service is established based on the dependent functions of various factors, in which the dependent functions are chosen in accordance with the difference of various factors affecting the deterioration of durability of components. In this model, the durability of the bridge is divided into five different fuzzy levels: intact, disrepaired, damaged, severely damaged, and dangerous. Finally, based on fuzzy mathematics theory, the durability level of a bridge in practice is evaluated by using the maximum subordination principle.

Determination of Permeability Properties of Concrete Surface Modified by CPF

2015 ◽  
Vol 732 ◽  
pp. 389-392 ◽  
Author(s):  
Pavel Reiterman
Keyword(s):  
Surface Layer ◽  
Water Transport ◽  
Concrete Surface ◽  
Experimental Results ◽  
Experimental Program ◽  
Functional Characteristics ◽  
Concrete Permeability ◽  
Surface Modified ◽  
Durability Of Concrete

The paper introduces an experimental program focused on the monitoring of water transport in surface layer of concrete aimed at monitoring the permeability of concrete, since concrete permeability is a property uniquely affecting durability of concrete. Introduced methods are complemented by experimental results and other traditional tests. These findings will serve to further optimization of the structure being created, thus ensuring its better aesthetic and functional characteristics.

Research on the Choice of District Resolves Solution of Chinese Railway Reform and Restructuring

2014 ◽  
Vol 644-650 ◽  
pp. 5864-5867
Author(s):  
Zhao Hui
Keyword(s):  
Cluster Analysis ◽  
Hierarchical Cluster Analysis ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Hierarchical Cluster ◽  
Gray Scale ◽  
Comprehensive Evaluation Method ◽  
Balance Scale ◽  
Pros And Cons ◽  
Division Scheme

This paper, using the hierarchical cluster analysis and the gray scale comprehensive evaluation method, considering operating balance scale of regional companies, the proportion of inter-regional exchange of goods, compares the pros and cons of each division scheme and we find that seven regional companies is the most suitable for railway development.

scholarly journals Comparative Evaluation of effect of resin protective coatings on the surface hardness and shear punch strength of different GlCs - An InVitro Study

2021 ◽  
Vol 19 (3) ◽  
pp. 160-165
Author(s):  
N. Mishra ◽  
M. Agarwal ◽  
M. P. Singh ◽  
A. Khullar ◽  
K. Magwa ◽  
...  
Keyword(s):  
Shear Strength ◽  
Clinical Practice ◽  
Protective Coating ◽  
Surface Coating ◽  
Comparative Evaluation ◽  
Protective Coatings ◽  
Surface Hardness ◽  
Daily Clinical Practice ◽  
Glass Ionomer ◽  
Shear Punch

G-Coat Plus is a nano-filled, self-adhesive light cured protective coating that strengthens, protects and enhances glass ionomer restorations. The effect of G- Coat plus on different GICs have not been studied comprehensively. Hence the study was conducted to compare the effect of resin coating on surface hardness and Shear punch strength of newer modified GIC.Materials and methods: 120 samples of three GICs i.e. Fuji IX Extra, Fuji IX Fast, Fuji II LC were prepared using specialized metal moulds. Specimens of Fuji II LC were light cured for 20 seconds. Coated and uncoated samples were tested for surface hardness and 30 samples were tested for shear punch strength. P < 0.05 was considered as significant. Results: Shear Punch Strength after G-Coat plus coating was significantly higher for Fuji IX Extra followed by Fuji II LC. Surface Hardness after G- Coat plus coating was significantly higher for Fuji IX Extra followed by Fuji IX Fast and Fuji II LC.Conclusion: Surface coating by a resin agent significantly increases the surface hardness and shear strength of the GIC. Considering the above stated findings, they can be incorporated into daily clinical practice to enhance the strength and longevity of GIC.

Sign in / Sign up

Export Citation Format

Share Document