New Surface-Treatment Technique of Concrete Structures Using Crack Repair Stick with Healing Ingredients
This study focused on the development of a crack repair stick as a new repair method along with self-healing materials that can be used to easily repair the cracks in a concrete structure at the construction site. In developing this new repair technique, the self-healing efficiency of various cement...
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doaj-a98f035a74434796ae31624f9e8229892020-11-24T22:57:42ZengMDPI AGMaterials1996-19442016-08-019865410.3390/ma9080654ma9080654New Surface-Treatment Technique of Concrete Structures Using Crack Repair Stick with Healing IngredientsTae-Ho Ahn0Hong-gi Kim1Jae-Suk Ryou2International Sustainable Engineering Materials (ISEM) Center, Ceramic Materials Institute & Division of Advanced Materials Science Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-79, KoreaDepartment of Civil Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-79, KoreaDepartment of Civil Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-79, KoreaThis study focused on the development of a crack repair stick as a new repair method along with self-healing materials that can be used to easily repair the cracks in a concrete structure at the construction site. In developing this new repair technique, the self-healing efficiency of various cementitious materials was considered. Likewise, a crack repair stick was developed to apply to concrete structures with 0.3 mm or lower crack widths. The crack repair stick was made with different materials, such as cement, an expansive material (C12A7), a swelling material, and calcium carbonate, to endow it with a self-healing property. To verify the performance of the crack repair stick for concrete structures, two types of procedures (field experiment and field absorption test) were carried out. As a result of such procedures, it was concluded that the developed crack repair stick could be used on concrete structures to reduce repair expenses and for the improved workability, usability, and serviceability of such structures. On the other hand, to evaluate the self-healing performance of the crack repair stick, various tests were conducted, such as the relative dynamic modulus of elasticity test, the water tightness test, the water permeability test, observation via a microscope, and scanning electron microscope (SEM) analysis. From the results, it is found that water leakage can be prevented and that the durability of a concrete structure can be improved through self-healing. Also, it was verified that the cracks were perfectly closed after 28 days due to application of the crack repair stick. These results indicate the usability of the crack repair stick for concrete structures, and its self-healing efficiency.http://www.mdpi.com/1996-1944/9/8/654autogenous healingsurface treatmentmicro-crackrepair materialswater leakage |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Tae-Ho Ahn Hong-gi Kim Jae-Suk Ryou |
spellingShingle |
Tae-Ho Ahn Hong-gi Kim Jae-Suk Ryou New Surface-Treatment Technique of Concrete Structures Using Crack Repair Stick with Healing Ingredients Materials autogenous healing surface treatment micro-crack repair materials water leakage |
author_facet |
Tae-Ho Ahn Hong-gi Kim Jae-Suk Ryou |
author_sort |
Tae-Ho Ahn |
title |
New Surface-Treatment Technique of Concrete Structures Using Crack Repair Stick with Healing Ingredients |
title_short |
New Surface-Treatment Technique of Concrete Structures Using Crack Repair Stick with Healing Ingredients |
title_full |
New Surface-Treatment Technique of Concrete Structures Using Crack Repair Stick with Healing Ingredients |
title_fullStr |
New Surface-Treatment Technique of Concrete Structures Using Crack Repair Stick with Healing Ingredients |
title_full_unstemmed |
New Surface-Treatment Technique of Concrete Structures Using Crack Repair Stick with Healing Ingredients |
title_sort |
new surface-treatment technique of concrete structures using crack repair stick with healing ingredients |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2016-08-01 |
description |
This study focused on the development of a crack repair stick as a new repair method along with self-healing materials that can be used to easily repair the cracks in a concrete structure at the construction site. In developing this new repair technique, the self-healing efficiency of various cementitious materials was considered. Likewise, a crack repair stick was developed to apply to concrete structures with 0.3 mm or lower crack widths. The crack repair stick was made with different materials, such as cement, an expansive material (C12A7), a swelling material, and calcium carbonate, to endow it with a self-healing property. To verify the performance of the crack repair stick for concrete structures, two types of procedures (field experiment and field absorption test) were carried out. As a result of such procedures, it was concluded that the developed crack repair stick could be used on concrete structures to reduce repair expenses and for the improved workability, usability, and serviceability of such structures. On the other hand, to evaluate the self-healing performance of the crack repair stick, various tests were conducted, such as the relative dynamic modulus of elasticity test, the water tightness test, the water permeability test, observation via a microscope, and scanning electron microscope (SEM) analysis. From the results, it is found that water leakage can be prevented and that the durability of a concrete structure can be improved through self-healing. Also, it was verified that the cracks were perfectly closed after 28 days due to application of the crack repair stick. These results indicate the usability of the crack repair stick for concrete structures, and its self-healing efficiency. |
topic |
autogenous healing surface treatment micro-crack repair materials water leakage |
url |
http://www.mdpi.com/1996-1944/9/8/654 |
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