A review of intrinsic self-healing capability of engineered cementitious composites: Recovery of transport and mechanical properties

Yıldırım, Gürkan; Keskin, Özlem Kasap; Keskin, Süleyman Bahadır; Şahmaran, Mustafa; Lachemi, Mohamed

doi:10.1016/j.conbuildmat.2015.10.018

Cited by 148 publications

(37 citation statements)

References 49 publications

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“…Cracking age was reported to have a vital impact on the self-healing of concrete or composite with the 18 high proportion of cement and supplementary cementitious materials (SCMs) such as fly ash, slag 19 based Engineered Cementitious Composites (ECCs) [6][7][8][9][10][11][12][13]. Two different types of fly ash (low lime 20 and high lime) and ground granulated blast furnace slag (GGBS) about 1.2 times of PC in ECC were 21 pre-damaged to 80% of the their deformed capacities at 7, 28 and 90 days, and their self-healing 22 performance based on sorptivity and rapid chloride permeability tests (RCPT) showed decreasing 23 healing trend with the increase in pre-damage age [9,10]. The self-healing of these fly ash and GGBS 24 based ECCs was reported less effective when composites aged to maturity [11][12][13], although the use 25 of hydrated lime [12] and CO 2 -water curing [13] in ECCs reported to enhanced the healing efficiency.…”

Section: Introductionmentioning

confidence: 99%

Autogenous self-healing of cement with expansive minerals-II: Impact of age and the role of optimised expansive minerals in healing performance

Qureshi

Kanellopoulos

Al‐Tabbaa

2019

Construction and Building Materials

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7This part of the study presents the optimisation of expansive minerals mix proportions and establishes 8 a quantitative and qualitative correlation between self-healing and the cracking age of cementitious 9 materials. The hydration degree of cementitious materials is considered as a quantitative measure of 10 age and the corresponding healing performance was analysed to establish an age-healing relation. 11Healing performances were assessed in terms of load recovery, crack sealing efficiency and gas 12 permeability. The microstructure of materials was investigated using XRD, TGA and SEM-EDX. The 13 self-healing performance of particular cement mixes shows linearly increasing correlation with the 14 reduction of hydration degree. However, cement mixes containing expansive mineral result in higher 15 healing performance than mixes containing only Portland cement (PC). This observation was 16 confirmed for all cracking ages. Blends containing only PC showed healing materials that were 17 mostly calcite and portlandite, while the optimised use of expansive minerals produced denser healing 18 materials with C-S-H, and complex Ca, Mg, Si, Al combined hydrated and carbonated products in 19 addition to calcite and portlandite. The results further suggest that the proportions of calcite, 20 portlandite and ettringite in healing compounds have an increasing trend with the age of hardened 21 cementitious materials. 22

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Section: Introductionmentioning

confidence: 99%

Autogenous self-healing of cement with expansive minerals-II: Impact of age and the role of optimised expansive minerals in healing performance

Qureshi

Kanellopoulos

Al‐Tabbaa

2019

Construction and Building Materials

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“…This suggests that even when cracked as a result of restrained shrinkage, HPFRC mixtures are very likely to stay durable and keep their integrity upon exposure to severe environmental conditioning. Smaller crack widths are also known to favor autogenous self‐healing of concrete material without external interference . According to Clear, to achieve an increased self‐healing efficiency, crack widths should be less than 300 μm level.…”

Section: Resultsmentioning

confidence: 99%

Dimensional stability of deflection‐hardening hybrid fiber reinforced concretes with coarse aggregate: Suppressing restrained shrinkage cracking

Yıldırım

2018

Structural Concrete

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High Performance Fiber Reinforced Concretes (HPFRCs) with deflection‐hardening capability are relatively novel materials with high damage tolerance. However, mixture proportions of such materials are mostly designed with fine aggregates for easier/homogenous fiber distribution and low matrix fracture toughness which increases the amount of cementitious materials as the main binder and related risk for dimensional instability, high cost, and environmental unfriendliness. Here, with the idea of developing concrete that is free of shrinkage‐related cracking at a more reasonable price, deflection‐hardening HPFRC mixtures incorporating different amounts of coarse aggregates (with maximum size of 12 mm) were developed with different mixture parameters (fiber types/dosages and fly ash contents) and tested for their dimensional stability by focusing mainly on the drying and restrained shrinkage measurements. Experimental results reveal that the combined effectiveness of utilizing hybrid fiber reinforcement and high amounts of coarse aggregates by properly adjusting the matrix properties without compromising high ductility (deflection‐hardening behavior) can help the realization of possible producibility of HPFRC mixtures that are completely free of restrained shrinkage‐related cracking. The findings of this study are believed to make a significant impact on the wide‐spread usage of deflection‐hardening HPFRC mixtures with similar ingredients to that of conventional concrete in actual field conditions.

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“…Given the materials' enhanced performance, many studies have focused on their basic mechanical and durability properties . Due to the crack bearing ability and controlled cracking behavior of HPFRCs, their self‐healing behavior has also been studied extensively . However, studies into more complex material properties such as resistance to impact loading are lacking in the current literature.…”

Section: Introductionmentioning

confidence: 99%

Impact resistance of deflection‐hardening fiber reinforced concretes with different mixture parameters

Banyhussan

Yıldırım

Erdem

et al. 2019

Structural Concrete

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The impact behavior of deflection‐hardening High Performance Fiber Reinforced Cementitious Concretes (HPFRCs) was evaluated herein. During the preparation of HPFRCs, fiber type and amount, fly ash to Portland cement ratio and aggregate to binder ratio were taken into consideration. HPFRC beams were tested for impact resistance using free‐fall drop‐weight test. Acceleration, displacement, and impact load versus time graphs were constructed and their relationship to the proposed mixture parameters were evaluated. The paper also aims to present and verify a nonlinear finite element analysis, employing the incremental nonlinear dynamic analysis, concrete damage plasticity model, and contact surface between the dropped hammer and test specimen available in ABAQUS. The proposed modeling provides extensive and accurate data on structural behavior, including acceleration, displacement profiles, and residual displacement results. Experimental results which are further confirmed by numerical studies show that impact resistance of HPFRC mixtures can be significantly improved by a proper mixture proportioning. In the presence of high amounts of coarse aggregates, fly ash, and increased volume of hybrid fibers, impact resistance of fiberless reference specimens can be modified in a way to exhibit relatively smaller displacement results after impact loading without risking the basic mechanical properties and deflection‐hardening response with multiple cracking.

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A review of intrinsic self-healing capability of engineered cementitious composites: Recovery of transport and mechanical properties

Cited by 148 publications

References 49 publications

Autogenous self-healing of cement with expansive minerals-II: Impact of age and the role of optimised expansive minerals in healing performance

Autogenous self-healing of cement with expansive minerals-II: Impact of age and the role of optimised expansive minerals in healing performance

Dimensional stability of deflection‐hardening hybrid fiber reinforced concretes with coarse aggregate: Suppressing restrained shrinkage cracking

Impact resistance of deflection‐hardening fiber reinforced concretes with different mixture parameters

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