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 Study on Applicability of Accelerated Deterioration Test for Evaluation of Bond Property in Concrete Surface Coating System

2013 ◽  
Vol 62 (8) ◽  
pp. 524-530
Author(s):  
Takuji YAMADA ◽  
Yoichi TSUKUDA ◽  
Takashi YAMAMOTO ◽  
Minoru KUNIEDA ◽  
Toyoaki MIYAGAWA
Keyword(s):  
Surface Coating ◽  
Concrete Surface ◽  
Coating System ◽  
Bond Property

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.

Chloride penetration into reinforced concrete slabs

1998 ◽  
Vol 25 (1) ◽  
pp. 87-95 ◽  
Author(s):  
A K Suryavanshi ◽  
R N Swamy ◽  
S McHugh
Keyword(s):  
Reinforced Concrete ◽  
Surface Coating ◽  
Lateral Diffusion ◽  
Chloride Penetration ◽  
Chloride Diffusion ◽  
Concrete Slabs ◽  
Coating System ◽  
Depth Of Penetration ◽  
Lateral Direction ◽  
Reinforced Concrete Slabs

The overall aim of this paper is to establish the process and amount of chlorides penetrating reinforced concrete elements when exposed to a salt-laden environment. For this purpose, a number of slabs were subjected to 70 cycles of wetting-drying regime with a 4% sodium chloride solution over a period of 2-3 years. To examine the direction of transportation of the chlorides, some of the slabs were partially coated with a surface coating system known to be highly resistant to chloride penetration. The amount and depth of penetration of chlorides in the coated and uncoated parts of the slab were then determined. The results show conclusively that, in large exposed areas of concrete, chlorides diffuse both in the direction of depth and in a direction lateral to the depth of the element. The amount of chlorides and the distance of their lateral diffusion depend on the water-to-cement (w/c) ratio of the concrete and the duration of exposure. Concrete mixes with a high w/c ratio (0.75) are highly conducive to this lateral diffusion of chlorides. Although concrete mixes of lower w/c ratios (0.45 and 0.60) are less conducive to lateral diffusion of chlorides, in practice, all concretes should be considered to be prone to chloride diffusion in both the direction of gravity and the lateral direction because of the effects of cracking. In unprotected concrete, reducing the w/c ratio from 0.60 to 0.45 is far more effective in decreasing chloride penetration than that achieved by reducing the w/c ratio from 0.75 to 0.60. The acrylic-based surface coating system is totally resistant to chloride penetration.Key words: chloride diffusion, concrete slabs, durability, water-to-cement ratio, surface coating, lateral diffusion.

scholarly journals An Effect of Concrete Surface Coating on Internal Stress of ASR-affected RC Beams and RC Columns under Sustained Load

1995 ◽  
Vol 6 (2) ◽  
pp. 9-20
Author(s):  
Hidenori Hamada ◽  
R.N. Swamy ◽  
Shin Tanikawa ◽  
Jaw-Chang Laiw
Keyword(s):  
Internal Stress ◽  
Surface Coating ◽  
Concrete Surface ◽  
Sustained Load ◽  
Rc Beams ◽  
Rc Columns

scholarly journals Evaluation of Concrete Surface Coating Method Applied to San-yo Shinkansen RC Structures

2009 ◽  
Vol 58 (8) ◽  
pp. 691-696 ◽  
Author(s):  
Yoshihiko WATANABE ◽  
Satoshi ARAMAKI ◽  
Yoshifumi MATSUDA ◽  
Takuji YAMADA ◽  
Toyoaki MIYAGAWA
Keyword(s):  
Surface Coating ◽  
Concrete Surface ◽  
Rc Structures ◽  
Coating Method

scholarly journals Novel Surface Coating System Based on Maleated Shellac

2010 ◽  
Vol 7 (s1) ◽  
pp. S55-S60 ◽  
Author(s):  
Hasmukh S. Patel ◽  
Sumeet J. Patel
Keyword(s):  
Maleic Anhydride ◽  
Surface Coating ◽  
Chemical Resistance ◽  
Natural Forest ◽  
Coating System ◽  
Good Adhesion ◽  
Coating Materials ◽  
Film Performance ◽  
Plaster Of Paris ◽  
Acrylic Resins

Shellac a natural forest product was reacted with various proportion of maleic anhydride. The resulted maleated shellac samples were designated as (MS-1 to 3) and applied for the preparation of surface coating material. Thus various compositions of coating materials were prepared by varying the contents of MS and commercial grades of acrylic resins (AR). The coating materials were applied on substrates like plaster of paris, cement and limed surface. All the coating showed film performance with good adhesion finish, smoothness and lack of flaking on the surfaces. The results show that the coating showed good water and chemical resistance.

Efficiency Evaluation of Concrete Surface Treatment

2018 ◽  
Vol 272 ◽  
pp. 9-14
Author(s):  
Jakub Řepka ◽  
Tomáš Vlach ◽  
Lenka Laiblová ◽  
Tereza Pavlů ◽  
Michal Ženíšek ◽  
...  
Keyword(s):  
Evaluation Method ◽  
Weather Conditions ◽  
Concrete Surface ◽  
Efficiency Evaluation ◽  
Technical Standards ◽  
Surface Protection ◽  
Testing Procedures ◽  
Original Surface ◽  
Surface Durability ◽  
Concrete Elements

This paper presents the simplified method of efficiency evaluation of surface protection products for concrete elements. This evaluation method was designed to consist of as few testing procedures as possible and to use as few specimens as well. Several testing processes most of which were based on the European technical standards were used to compare five commercially available products. Those comparisons served to assess whether the chosen method has sufficient informative value and does not require a disproportionate amount of time and money. The main examined properties were impact on color and reflectivity of the original surface, durability of the coating in extreme weather conditions, wettability of the surface and amount of labor needed for its maintenance. All of these experiments were optimized so that they could be performed on one type of specimen.

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