Is concrete healing really efficient? A review

Sidiq, Amir; Gravina, Rebecca

doi:10.1016/j.conbuildmat.2019.02.002

Cited by 114 publications

(50 citation statements)

References 122 publications

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“…Based on the literature [11,17], 10 5 cfu/ml is the Fig. 1 Year-wise number of publications for phrase search "concrete healing" [1,8] Fig. 2 Bacillus subtilis spore powder optimum concentration for improving the strength of concrete same concentration of bacteria which is used in this study.…”

Section: Methodsmentioning

confidence: 99%

“…The autogenous healing in younger concrete is possible due to more unhydrated cement. However, it is difficult for autogenous healing at later ages of concrete [8][9][10]. The research on preventing interventions to limit the formation of cracks has been increased in the recent past so as to achieve higher structural performance [11]; further, the monumental response to the degradation of concrete at the micro-level by adding the self-healing materials has also drawn the attention of researchers.…”

Section: Introductionmentioning

confidence: 99%

“…The increase in the focus of researchers in this aspect is depicted in Fig. 1 based on the publications in recent years [1,8].…”

Section: Introductionmentioning

confidence: 99%

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Self-repairing of concrete cracks by using bacteria and basalt fiber

Vijay

Murmu

2019

SN Appl. Sci.

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Concrete is a most extensively used material in construction; however, cracks in concrete are unavoidable. There is a new technology that can heal the cracks by precipitated calcium carbonate called as microbial self-healing concrete which reduces the coefficient of permeability. The self-healing/self-repairing concrete with the addition of fibers can be used in construction industries to enhance the strength and durability of concrete. Fibers may reduce the crack width by bridging action and bacteria develop a filling material in that bridge portion. This improves the durability and strength of bacterial concrete. In the present study, four different mixes are prepared, namely normal concrete, bacterial concrete, fiber-reinforced concrete, and bacterial concrete, with the addition of fibers. The healing/repairing efficiency of concrete is measured in terms of electrical resistivity and compressive strength of concrete on pre-cracked samples and healed samples. Further, the results are correlated with the scanning electron microscope and energy-dispersive X-ray spectrometer analysis. The results and analysis that carried out show substantial enhancement in the durability and strength of concrete with the addition of fibers in bacterial concrete.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Self-repairing of concrete cracks by using bacteria and basalt fiber

Vijay

Murmu

2019

SN Appl. Sci.

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“…This smart technique can guarantee the service life extension by a degradation rate reduction, damage maintenance frequency reduction, and strength monitoring or damage detection costs reduction [24]. Self-healing (SH) / Self-repairing (SR) is a process by the material itself during the service lifetime involving the partial or the complete recovery of voids or cracks that reducing its performance [25]. Concrete SR classified into two categories: i) Autogenic repairing is an own material property triggered with hydration of the un-hydrated cement remaining in the matrix without any external activation but only by moisture that penetrates the crack.…”

Section: Damage Bio-managing Techniquesmentioning

confidence: 99%

Self-repairing polyethylene fiber-reinforced-concrete with bacillus subtilis bacteria a review

Ghoneim

Hassan

Aboul-Nour

2020

IJET

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Fibers and bacterial additives in concrete have achieved significant success as a construction material. This paper presents the field of concrete self-repairing by introducing both Bacillus subtilis bacteria and polyethylene fiber as a dual-components. The main research goal is to reveal the principles of concrete self-repairing. At first, the research investigates the fiber-reinforced-concrete behavior, the concrete self-repairing process with the Bacillus subtilis bacteria for forming bacterial-concrete. And then, the study highlights the damage-repairing numerical simulation of fiber-reinforced-bacterial-concrete. The research shows the bacterial-concrete benefits to durability and mechanical properties besides to the polyethylene fiber assistance to enhance post-cracking tensile resistance and the pre-peak elastic modulus of concrete. The novelty of the fiber-reinforced-bacterial-concrete is the matrix combined improvement of both basic material properties and the post-cracking deflection capacity.

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“…Hence, a clearer knowledge of the PE/concrete interfacial properties is important since a better bonding between ECC and PE results in a smaller crack width. The autogenous healing effect is found in ECC, and is more obvious if the crack width is limited [4,5,6,7]. Concrete is a heterogeneous material, and silica (S) makes up more than 40 percent by weight of the concrete.…”

Section: Introductionmentioning

confidence: 99%

Interface Characterization Between Polyethylene/ Silica in Engineered Cementitious Composites by Molecular Dynamics Simulation

et al. 2019

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Polyethylene is widely adopted in engineered cementitious composites to control the crack width. A clearer knowledge of the PE/concrete interfacial properties is important in developing engineered cementitious composites, which can lead to a limited crack width. Tensile failure and adhesion properties of the amorphous polyethylene/silica (PE/S) interface are investigated by molecular dynamics to interpret the PE/concrete interface. The influence of the PE chain length, the PE chain number and coupling agents applied on silica surface on the interfacial adhesion is studied. An increase of the adhesion strength of the modified silica surface by coupling agents compared with the unmodified silica is found. The failure process, density profile and potential energy evolutions of the PE/S interface are studied. The thermodynamic work of adhesion that quantifies the interfacial adhesion of the PE/S interface is evaluated. The present study helps to understand the interfacial adhesion behavior between ECC and PE, and is expected to contribute to restricting the crack width.

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Is concrete healing really efficient? A review

Cited by 114 publications

References 122 publications

Self-repairing of concrete cracks by using bacteria and basalt fiber

Self-repairing of concrete cracks by using bacteria and basalt fiber

Self-repairing polyethylene fiber-reinforced-concrete with bacillus subtilis bacteria a review

Interface Characterization Between Polyethylene/ Silica in Engineered Cementitious Composites by Molecular Dynamics Simulation

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