Self-healing efficiency of Ultra High-Performance Fiber-Reinforced Concrete through permeability to chlorides

Doostkami, Hesam; Roig-Flores, Marta; Serna, Pedro

doi:10.1016/j.conbuildmat.2021.125168

Cited by 29 publications

(13 citation statements)

References 31 publications

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“…The slower healing rate of HPFRC with CLAs was associated with the slower growth rate of aragonite compared to calcite. Doostkami et al 290 studied the self-healing performances of high-performance FRC and UHPFRC over that of conven-tional concrete. In addition, they explored performances with the addition of CLAs at a 0.8% dose.…”

Section: Fibersmentioning

confidence: 99%

“…The better redistribution of the stress with multiple cracking in the UHPFRC rendered better crack healing and permeability performance. 290 Roig-Flores et al 291 studied the effect of self-healing properties of steel fiber reinforced concrete using 4% CLAs under water curing at 15 and 30 °C and under wet−dry conditions. Samples were precracked at 2 days with crack widths in the 0.1−0.4 mm range.…”

Section: Fibersmentioning

confidence: 99%

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Toward Self-Healing Concrete Infrastructure: Review of Experiments and Simulations across Scales

et al. 2023

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Cement and concrete are vital materials used to construct durable habitats and infrastructure that withstand natural and human-caused disasters. Still, concrete cracking imposes enormous repair costs on societies, and excessive cement consumption for repairs contributes to climate change. Therefore, the need for more durable cementitious materials, such as those with self-healing capabilities, has become more urgent. In this review, we present the functioning mechanisms of five different strategies for implementing self-healing capability into cement based materials: (1) autogenous self-healing from ordinary portland cement and supplementary cementitious materials and geopolymers in which defects and cracks are repaired through intrinsic carbonation and crystallization; (2) autonomous self-healing by (a) biomineralization wherein bacteria within the cement produce carbonates, silicates, or phosphates to heal damage, (b) polymer–cement composites in which autonomous self-healing occurs both within the polymer and at the polymer–cement interface, and (c) fibers that inhibit crack propagation, thus allowing autogenous healing mechanisms to be more effective. In all cases, we discuss the self-healing agent and synthesize the state of knowledge on the self-healing mechanism(s). In this review article, the state of computational modeling across nano- to macroscales developed based on experimental data is presented for each self-healing approach. We conclude the review by noting that, although autogenous reactions help repair small cracks, the most fruitful opportunities lay within design strategies for additional components that can migrate into cracks and initiate chemistries that retard crack propagation and generate repair of the cement matrix.

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Section: Fibersmentioning

confidence: 99%

Section: Fibersmentioning

confidence: 99%

Toward Self-Healing Concrete Infrastructure: Review of Experiments and Simulations across Scales

et al. 2023

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“…3, which shows an appreciable ductility performance particularly in the tensile behavior. The durability parameters have also been evaluated and reported in several publications and are summarized in Table 3 [23][24][25][26][27][28][29][30][31][32].…”

Section: Materials and Designmentioning

confidence: 99%

Structural validation of geothermal water basins constructed with durability enhanced ultra high performance fiber reinforced concrete (Ultra High Durability Concrete)

Al-Obaidi

Davolio

Monte

et al. 2022

Case Studies in Construction Materials

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“…After healing for 28 days in different conditions, and after finishing the final water permeability test, chloride penetration through the healed cracks was evaluated. Hereafter, a modified chloride permeability test presented in previous studies [16,17] was performed. This test not only gives data about the permeability through the healed crack but also about the permeability of the concrete matrix, which provides information about the crack healing produced as well as variations in the matrix.…”

Section: Chloride Penetration Testmentioning

confidence: 99%

Self-healing of concrete containing commercial bacteria by means of water and chlorides permeability

et al. 2022

Self Cite

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Microbial-induced calcium precipitation (MICP) has shown adequate potential to act as a healing product through Calcium Carbonate (CaCO3) precipitation inside cracks. This work studies the self-healing capability of conventional concrete incorporating two dosages of Bacillus subtilis encapsulated in diatomaceous earth and a liquid solution consisting of a combination of Bacillus, denitrifying, and photosynthetic bacteria. The two bacterial agents used are commercial or industrial products from other sectors. For these mixes, disks of size ϕ100×50 mm were pre-cracked at the age of 21 days by splitting test until reaching residual cracks of 100 to 450 µm. At the age of 28 days, self-healing was promoted during 28 days in three exposures, continuous water immersion at 20°C, a high humidity environment at 20°C and 95% of relative humidity, and 7 days immersed in water at 20°C and 21 days in the high humidity environment. Self-healing was analyzed with water permeability by comparing the results before and after healing. Afterward, chlorides’ penetration was performed to study the possible healing protection on cracked disks compared to uncracked reference disks. As a result, after 7 days of immersion in water, the mixes with bacteria presented acceptable healing results. Some healed cracks could also significantly reduce the penetration of chlorides towards the interior of the concrete matrix.

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Self-healing efficiency of Ultra High-Performance Fiber-Reinforced Concrete through permeability to chlorides

Cited by 29 publications

References 31 publications

Toward Self-Healing Concrete Infrastructure: Review of Experiments and Simulations across Scales

Toward Self-Healing Concrete Infrastructure: Review of Experiments and Simulations across Scales

Structural validation of geothermal water basins constructed with durability enhanced ultra high performance fiber reinforced concrete (Ultra High Durability Concrete)

Self-healing of concrete containing commercial bacteria by means of water and chlorides permeability

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