A survey on problems encountered in current concrete construction and the potential benefits of self-healing cementitious materials

Gardner, Diane Ruth; Lark, Robert John; Jefferson, Tony; Davies, Robert

doi:10.1016/j.cscm.2018.02.002

Cited by 74 publications

(50 citation statements)

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“…The proof of concept for including a vascular network in concrete has been demonstrated a number of times . The versatility of the vascular network concept could prove to be the ideal solution to the most difficult challenges of overcoming water ingress and cracking prevalent in concrete . However, there remains a challenge to develop large concrete structures with vascular network systems that can initiate healing without human intervention.…”

Section: Encapsulated Autonomous Self‐healing (Polymers or Minerals)mentioning

confidence: 99%

A Review of Self‐Healing Concrete for Damage Management of Structures

Belie

Gruyaert

Al‐Tabbaa

et al. 2018

Adv Materials Inter

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450

278

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The increasing concern for safety and sustainability of structures is calling for the development of smart self-healing materials and preventive repair methods. The appearance of small cracks (<300 µm in width) in concrete is almost unavoidable, not necessarily causing a risk of collapse for the structure, but surely impairing its functionality, accelerating its degradation, and diminishing its service life and sustainability. This review provides the state-ofthe-art of recent developments of self-healing concrete, covering autogenous or intrinsic healing of traditional concrete followed by stimulated autogenous healing via use of mineral additives, crystalline admixtures or (superabsorbent) polymers, and subsequently autonomous self-healing mechanisms, i.e. via, application of micro-, macro-, or vascular encapsulated polymers, minerals, or bacteria. The (stimulated) autogenous mechanisms are generally limited to healing crack widths of about 100-150 µm. In contrast, most autonomous self-healing mechanisms can heal cracks of 300 µm, even sometimes up to more than 1 mm, and usually act faster. After explaining the basic concept for each self-healing technique, the most recent advances are collected, explaining the progress and current limitations, to provide insights toward the future developments. This review addresses the research needs required to remove hindrances that limit market penetration of self-healing concrete technologies.

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Section: Encapsulated Autonomous Self‐healing (Polymers or Minerals)mentioning

confidence: 99%

A Review of Self‐Healing Concrete for Damage Management of Structures

Belie

Gruyaert

Al‐Tabbaa

et al. 2018

Adv Materials Inter

Self Cite

450

278

View full text Add to dashboard Cite

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“…On the other hand, the alkaline environment of concrete can prevent the corrosion of steel bars to a certain extent. Therefore, the application of reinforced concrete in building structures is common [1,2]. With the development and popularization of prestressed reinforced concrete technology, the proportion of reinforced concrete bridges exceeds half of the total in bridge engineering around the world [3].…”

Section: Introductionmentioning

confidence: 99%

A New Method for Internal Force Detection of Steel Bars Covered by Concrete Based on the Metal Magnetic Memory Effect

Pang

Zhou

Zhao

et al. 2019

Metals

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In this paper, the specimens of steel bars covered by concrete (SBCC) are taken as research objects, and a new method for steel bar internal force detection based on the metal magnetic memory effect is proposed. The variation law of the self-magnetic flux leakage (SMFL) signals on the surfaces of SBCC specimens with loading tension and the variation of the SMFL signals along the axial positions of specimens under different tensile forces are studied. The results show that when the loading tension is about 90% of the yield tension, the tangential component of the SMFL signal has a maximum extreme point. The distribution of the SMFL signals along the axial position shows a smooth curve, where the values at both ends are small while the intermediate values are large. This paper also proposes the use of the "area ratio deviation parameter" to quantitatively calculate the internal forces of the steel bars. This parameter shows a significant linear relationship with the loading tension during the strengthening stage of the specimens. This method can supplement the existing steel bar stress detection methods and has prospective research value. damage detection (destruction, semi-destruction) and non-destructive detection [5,6]. Compared with damage detection, non-destructive detection has the advantages of high precision, small error, and no destruction to the structure, so it is used more now [7]. The traditional non-destructive stress detection methods, such as ultrasonic testing [8,9], eddy current testing [10,11], and X-ray testing [12,13], cannot detect early damage of steel bars [14]. In order to accurately detect the early damage of metal materials by means of non-destructive detection, some effective and new methods based on the physics have come into being [15][16][17]. Metal magnetic memory (MMM) detection technology is one of them [18,19], which was first proposed by Russian scholar Dubov [20]. The basic principle of MMM detection can be summarized as follows: Ferromagnetics indicate that magnetism is a basic property of matter, and that any substance is magnetic. When putting any substance in a magnetic field, under the action of a magnetic field, the substance will be magnetized. The reason why a substance is magnetic is because there is a phenomenon in which electrons rotate and spin around the nucleus, and the magnetic properties of the substance can be quantified by magnetic moments [21,22]. The steel bars in reinforced concrete structures are typical metal materials, and their interior structure can be regarded as being composed of many magnetic domains. The interface between the magnetic domains is called the magnetic domain wall [23]. When subjected to the geomagnetic field, the steel bars are magnetized to excite the magnetic fields around themselves, which form the initial magnetic fields under the action of the geomagnetic field. When the steel bars are subjected to the external tension, under the action of the tensile forces and the geomagnetic field, the magnetic domain structures orient and irre...

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“…Poor performance of concrete structures has also received serious attention due to: (1) significant failure events like the infamous Opal Tower incident in Sydney; (2) large amount of waste (Korkmaz, Yakut, & Bayraktar, 2019); (3) low productivity of concreting activities (Australian Government, 2017); (4) insufficiency of concrete structures durability; (5) environmental disruption, among other issues associated with concreting activities and concrete structure. A brief description of the causes of each problem is presented below (Gardner, Lark, Jefferson, & Davies, 2018).…”

Section: Introductionmentioning

confidence: 99%

Internet of Things (IoT) for digital concrete quality control (DCQC): A conceptual framework

Ghosh¹,

Hosseini²,

Al-Ameri³

et al. 2019

Modern Building Materials, Structures and Techniques (MBMST)

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Concreting is generally a manual, labour intensive and time-consuming process, putting additional burden on constrained resources. Current practices of concreting are wasteful, non-sustainable and end products usually lack proper quality conformance. This paper, as the first outcome of an ongoing research project, proposes concrete as an area ripe for being disrupted by new technological developments and the wave of automation. It puts forward arguments to show that The Internet of Things (IoT), as an emerging concept, has the potential to revolutionize concreting operations, resulting in substantial time savings, confidence in its durability and enhanced quality conformance. A conceptual framework for a digital concrete quality control (DCQC) drawing upon IoT is outlined; DCQC facilitates automated lifecycle monitoring of concrete, controlled by real-time monitoring of parameters like surface humidity, temperature variance, moisture content, vibration level, and crack occurrence and propagation of concrete members through embedded sensors. Drawing upon an analytical approach, discussions provide evidence for the advantages of adopting DCQC. The proposed system is of particular appeal for practitioners, as a workable solution for reducing water, energy consumption and required man-hours for concreting procedures, as well as, providing an interface for access to real-time data, site progress monitoring, benchmarking, and predictive analytics purposes.

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A survey on problems encountered in current concrete construction and the potential benefits of self-healing cementitious materials

Cited by 74 publications

References 1 publication

A Review of Self‐Healing Concrete for Damage Management of Structures

A Review of Self‐Healing Concrete for Damage Management of Structures

A New Method for Internal Force Detection of Steel Bars Covered by Concrete Based on the Metal Magnetic Memory Effect

Internet of Things (IoT) for digital concrete quality control (DCQC): A conceptual framework

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