Quantitative evaluation on self-healing capacity of cracked concrete by water permeability test – A review

2022 ◽  
pp. 104404
Author(s):  
Sailong Hou ◽  
Kai Li ◽  
Zemei Wu ◽  
Fumin Li ◽  
Caijun Shi
Keyword(s):  
Quantitative Evaluation ◽  
Water Permeability ◽  
Self Healing ◽  
Permeability Test ◽  
Cracked Concrete

scholarly journals Self-Healing Performance Evaluation of Concrete Incorporating Inorganic Materials Based on a Water Permeability Test

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3202
Author(s):  
Kwang-Myong Lee ◽  
Hyung-Suk Kim ◽  
Do-Keun Lee ◽  
Kyung-Joon Shin
Keyword(s):  
Water Permeability ◽  
Standardized Test ◽  
Water Flow Rate ◽  
Test Methods ◽  
Inorganic Materials ◽  
Self Healing ◽  
Permeability Test ◽  
Research Activities ◽  
Number Of Factors ◽  
Rational Evaluation

Research activities that have focused on the development and understanding of self-healing concrete have proposed various technologies intended to enhance self-healing capacity. The self-healing performance cannot be identified sufficiently with either a single test or a specific parameter because there are a number of factors that influence the performance of self-healing. Thus, it has become necessary to provide standardized test methods that make it possible to verify and compare the performance of self-healing materials. In this paper, self-healing mortars based on inorganic admixtures, which are developed for sealing 0.3 mm cracks with a healing index of 90%, are produced and used to validate the water permeability test and to propose protocols for the evaluation of self-healing performance. The healing performances of three self-healing mortars and a plain mortar as a reference are evaluated with a comparative study. The equivalent crack width, which can be estimated from the water flow rate, is suggested as a rational evaluation index. Finally, a self-healing performance chart is proposed to comprehensively show the healing performance of cement-based materials.

Quantitative evaluation of self‐healing capacity in cementitious materials

2020 ◽  
Author(s):  
Maria Amenta ◽  
Zoi S. Metaxa ◽  
Stamatoula Papaioannou ◽  
Marios S. Katsiotis ◽  
Vassilis Kilikoglou ◽  
...  
Keyword(s):  
Quantitative Evaluation ◽  
Cementitious Materials ◽  
Self Healing

scholarly journals Effect of crack pattern on the self-healing capability in traditional, HPC and UHPFRC concretes measured by water and chloride permeability

2019 ◽  
Vol 289 ◽  
pp. 01006 ◽  
Author(s):  
Alberto Negrini ◽  
Marta Roig-Flores ◽  
Eduardo J. Mezquida-Alcaraz ◽  
Liberato Ferrara ◽  
Pedro Serna
Keyword(s):  
Reinforced Concrete ◽  
Water Permeability ◽  
High Performance ◽  
Water Immersion ◽  
Crack Pattern ◽  
The Self ◽  
Reinforced Concrete Beams ◽  
Multiple Cracks ◽  
Self Healing ◽  
High Performance Fibre

Concrete has a natural self-healing capability to seal small cracks, named autogenous healing, which is mainly produced by continuing hydration and carbonation. This capability is very limited and is activated only when in direct contact with water. High Performance Fibre-Reinforced Concrete and Engineered Cementitious Composites have been reported to heal cracks for low damage levels, due to their crack pattern with multiple cracks and high cement contents. While their superior self-healing behaviour compared to traditional concrete types is frequently assumed, this study aims to have a direct comparison to move a step forward in durability quantification. Reinforced concrete beams made of traditional, high-performance and ultra-high-performance fibre-reinforced concretes were prepared, sized 150×100×750 mm3. These beams were pre-cracked in flexion up to fixed strain levels in the tensioned zone to allow the analysis of the effect of the different cracking patterns on the self-healing capability. Afterwards, water permeability tests were performed before and after healing under water immersion. A modification of the water permeability test was also explored using chlorides to evaluate the potential protection of this healing in chloride-rich environments. The results show the superior durability and self-healing performance of UHPFRC elements.

Novel active crack width control technique to reduce the variation on water permeability results for self-healing concrete

2019 ◽  
Vol 203 ◽  
pp. 541-551 ◽  
Author(s):  
Tim Van Mullem ◽  
Elke Gruyaert ◽  
Brenda Debbaut ◽  
Robby Caspeele ◽  
Nele De Belie
Keyword(s):  
Water Permeability ◽  
Crack Width ◽  
Control Technique ◽  
Self Healing

Development of Microbial Metabolic Processes to Repair Concrete Joint Leakage

2013 ◽  
Vol 845 ◽  
pp. 158-162 ◽  
Author(s):  
F. Kubo ◽  
Shinichiro Okazaki ◽  
Isao Ujike
Keyword(s):  
Calcium Carbonate ◽  
Water Permeability ◽  
Metabolic Process ◽  
Permeability Test ◽  
Metabolic Processes ◽  
X Ray ◽  
Concrete Joints ◽  
Nutrition Source

This study proposes methods and examines the applicability of material generated from the metabolic processes of microorganisms to repair the leakage of concrete joints. Yeast was selected as the microorganism used for grout. The combination of yeast and a nutrition source with the largest amount of calcium carbonate extraction was found using the metabolic process of yeast. Calcium carbonate presence was determined by X-ray analysis. Water permeability of the concrete joint repaired with grout made from the largest yeast extraction was tested. From the results of the water permeability test, it is shown that grout made from the metabolic processes of yeast is capable of repairing a concrete joint.

Study on Organic Microcapsule Based Self-Healing Cementitious Composite

2011 ◽  
Vol 239-242 ◽  
pp. 764-767 ◽  
Author(s):  
Ming Zhang ◽  
Feng Xing ◽  
Kai Yong Shi ◽  
Xue Xiao Du
Keyword(s):  
Engineering Application ◽  
The Self ◽  
Self Healing ◽  
Cementitious Composite ◽  
Good Industry ◽  
Cracked Concrete ◽  
The Subject

Base on engineering application need, the subject introduce microcapsule that contains adhesive into cementituous composite for realizing the self-healing characteristics of cracked concrete. The technique has good industry feasibility, process operability, and reproducibility of self-healing characteristic. It is can resolve partial problems that other current self-healing methods are facing.

Durability evaluation of concrete made of fly ash and copper slag

2021 ◽  
Author(s):  
Yousef Zandi
Keyword(s):  
Fly Ash ◽  
Water Permeability ◽  
Environmental Conditions ◽  
Electrical Resistance ◽  
Copper Slag ◽  
Resistance Test ◽  
Power Relationship ◽  
Good Precision ◽  
Permeability Test ◽  
Water Penetration

AbstractIn this paper, to improve the durability of concrete, fly ash has been used as a percentage of cement and copper slag rather than a percentage of sand. Using a resistance test and water permeability test, four series of concrete specimens containing fly ash and copper slag, each containing 49 concrete mixing designs, were evaluated. After obtaining the results, eight samples with the highest electrical resistance were selected and the specimens were again tested in different environmental conditions. The results show that the environmental conditions of sulfate and carbonate have the least and most impact on reducing durability and there is a power relationship, with good precision, between the water penetration of the test specimens and the electrical resistance of the test specimens.

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