The Impact of Using Nano Self-Healing Concrete in Flexible Houses

Cementitious structures have prevailed worldwide and are expected to exhibit further growth in the future. Nevertheless, cement cracking is an issue that needs to be addressed in order to enhance structure durability and sustainability especially when exposed to aggressive environments. The purpose of this work was to examine the impact of the Superabsorbent Polymers (SAPs) incorporation into cementitious composite materials (mortars) with respect to their structure (hybrid structure consisting of organic core—inorganic shell) and evaluate the microstructure and self-healing properties of the obtained mortars. The applied SAPs were tailored to maintain their functionality in the cementitious environment. Control and mortar/SAPs specimens with two different SAPs concentrations (1 and 2% bwoc) were molded and their mechanical properties were determined according to EN 196-1, while their microstructure and self-healing behavior were evaluated via microCT. Compressive strength, a key property for mortars, which often degrades with SAPs incorporation, in this work, practically remained intact for all specimens. This is coherent with the porosity reduction and the narrower range of pore size distribution for the mortar/SAPs specimens as determined via microCT. Moreover, the self-healing behavior of mortar-SAPs specimens was enhanced up to 60% compared to control specimens. Conclusively, the overall SAPs functionality in cementitious-based materials was optimized.

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Numerical Studies of the Effects of Water Capsules on Self-Healing Efficiency and Mechanical Properties in Cementitious Materials

Advances in Materials Science and Engineering ◽

10.1155/2016/8271214 ◽

2016 ◽

Vol 2016 ◽

pp. 1-10 ◽

Cited By ~ 1

Author(s):

Haoliang Huang ◽

Guang Ye

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Elastic Modulus ◽

Cementitious Materials ◽

Self Healing ◽

Negative Effects ◽

Numerical Studies ◽

Healing Efficiency ◽

The Impact ◽

Positive Effect

In this research, self-healing due to further hydration of unhydrated cement particles is taken as an example for investigating the effects of capsules on the self-healing efficiency and mechanical properties of cementitious materials. The efficiency of supply of water by using capsules as a function of capsule dosages and sizes was determined numerically. By knowing the amount of water supplied via capsules, the efficiency of self-healing due to further hydration of unhydrated cement was quantified. In addition, the impact of capsules on mechanical properties was investigated numerically. The amount of released water increases with the dosage of capsules at different slops as the size of capsules varies. Concerning the best efficiency of self-healing, the optimizing size of capsules is 6.5 mm for capsule dosages of 3%, 5%, and 7%, respectively. Both elastic modulus and tensile strength of cementitious materials decrease with the increase of capsule. The decreasing tendency of tensile strength is larger than that of elastic modulus. However, it was found that the increase of positive effect (the capacity of inducing self-healing) of capsules is larger than that of negative effects (decreasing mechanical properties) when the dosage of capsules increases.

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The Impact of Traffic-Induced Bridge Vibration on Rapid Repairing High-Performance Concrete for Bridge Deck Pavement Repairs

Advances in Materials Science and Engineering ◽

10.1155/2014/632051 ◽

2014 ◽

Vol 2014 ◽

pp. 1-9 ◽

Cited By ~ 5

Author(s):

Wei Wang ◽

Shuo Liu ◽

Qizhi Wang ◽

Wei Yuan ◽

Mingzhang Chen ◽

...

Keyword(s):

Compressive Strength ◽

High Performance ◽

Bridge Deck ◽

High Performance Concrete ◽

Reduction Rate ◽

Harmonic Vibration ◽

Hydration Reaction ◽

Self Healing ◽

The Impact ◽

Bridge Deck Pavement

Based on forced vibration tests for high-performance concrete (HPC), the influence of bridge vibration induced by traveling vehicle on compressive strength and durability of HPC has been studied. It is concluded that 1 d and 2 d compressive strength of HPC decreased significantly, and the maximum reduction rate is 9.1%, while 28 d compressive strength of HPC had a slight lower with a 3% maximal drop under the action of two simple harmonic vibrations with 2 Hz, 3 mm amplitude, and 4 Hz, 3 mm amplitude. Moreover, the vibration had a slight effect on the compressive strength of HPC when the simple harmonic vibration had 4 Hz and 1 mm amplitude; it is indicated that the amplitude exerts a more prominent influence on the earlier compressive strength with the comparison of the frequency. In addition, the impact of simple harmonic vibration on durability of HPC can be ignored; this shows the self-healing function of concrete resulting from later hydration reaction. Thus, the research achievements mentioned above can contribute to learning the laws by which bridge vibration affects the properties of concrete and provide technical support for the design and construction of the bridge deck pavement maintenance.

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Effects of the Self-Healing Microcapsules on the Impact Property of Polymer Composite Gear

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.66-68.683 ◽

2011 ◽

Vol 66-68 ◽

pp. 683-687 ◽

Cited By ~ 1

Author(s):

Li Zhang ◽

Yan Jue Gong ◽

Shuo Zhang

Keyword(s):

Glass Fiber ◽

Polymer Composite ◽

The Self ◽

Impact Property ◽

Self Healing ◽

Fiber Reinforced ◽

Mechanical Impact ◽

Glass Fiber Reinforced ◽

The Impact

By designing the different formulations of the composites and adopting optimized technology including extrusion and molding, the effects of the Micro-capsules on the properties of nylon composites are analyzed by the impact property test. The mechanical impact property of the glass fiber reinforced nylon composites is influenced little if the content of the self-healing microcapsules added is less than 3.5%, and the technology of self-healing microcapsules used in the polymer composite gear is feasible.

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Effect of Urea-Formaldehyde (UF) with Waterborne Emulsion Microcapsules on Properties of Waterborne Acrylic Coatings Based on Coating Process for American Lime

Applied Sciences ◽

10.3390/app10186341 ◽

2020 ◽

Vol 10 (18) ◽

pp. 6341 ◽

Cited By ~ 1

Author(s):

Xiaoxing Yan ◽

Wenting Zhao ◽

Xingyu Qian

Keyword(s):

Urea Formaldehyde ◽

Paint Film ◽

Coating Process ◽

Self Healing ◽

Waterborne Coatings ◽

Aging Resistance ◽

Acrylic Coatings ◽

Waterborne Emulsion ◽

The Impact ◽

Good Coating

The purpose of this paper is to explore the effect of urea-formaldehyde (UF) with waterborne emulsion microcapsules on the optical, mechanical and aging resistance properties of waterborne coatings from the perspective of coating process. In this paper, the microcapsules were prepared with UF resin as the wall materials and waterborne emulsion as the core materials. Based on the coating process, the optical, mechanical and aging resistance properties of the waterborne acrylic coatings with microcapsules for American lime were tested. The good coating process is three layers of primer, two layers of topcoat, and adding microcapsules into primer. The results showed that the coating process had little effect on the color difference of the paint film with microcapsules, the gloss of the paint film prepared by the good coating process was basically not changed, and the mechanical properties of the paint film were good. At this time, the hardness grade of the paint film was 3H, the adhesion was grade 0, the impact resistance was 110.0 N·cm−2, and the elongation at break was 29.7%. The microcapsules added to the primer had better liquid resistance than those added to the topcoat. The paint film had good stability and aging resistance, and could inhibit the generation of microcracks to a certain extent. The paint film prepared by the good coating process had better comprehensive performance. This work provides a technical reference for self-healing of the waterborne coatings on American lime.

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The effects of textile reinforcements on the protective properties of self-healing polymers intended for safety gloves

Textile Research Journal ◽

10.1177/0040517520904374 ◽

2020 ◽

Vol 90 (17-18) ◽

pp. 1974-1986

Author(s):

Emilia Irzmańska ◽

Anna Bacciarelli-Ulacha ◽

Agnieszka Adamus-Włodarczyk ◽

Anna Strąkowska

Keyword(s):

Healing Process ◽

Polymeric Composite ◽

Polymeric Materials ◽

Economic Loss ◽

The Self ◽

Raw Material ◽

Protective Equipment ◽

Self Healing ◽

Hybrid Molecules ◽

The Impact

In the environment where glove material is exposed to harmful chemicals, hazards related to faster penetration of dangerous substances into the glove interior may cause microdamage. One of the solutions to overcome this problem is to use the self-healing polymeric materials that can minimize economic loss and accidents in the workplace. The current work aims to present the impact of different types of textile reinforcement on the effectiveness and efficiency of the self-healing process of methyl vinyl silicone rubber containing hybrid molecules with an inorganic silsesquioxane intended for use on all-rubber gloves. Three knitted fabrics with a similar structure and differentiated raw material composition were selected: polyamide, cotton–polyamide, and cotton. Evaluation of the self-healing process of the elastomeric composite to personal protective equipment was performed. For this purpose the assessment of the surface morphology of materials has been performed before and after the self-healing process. The implementation of knitted fabric into the polymeric composite in the tested samples allowed us to obtain the best results in all tests. The studied composite samples exhibited an increased resistance to three types of damage: penetration, abrasion and puncture. The samples also underwent the self-healing processes and regeneration after a proper conditioning period. Thus, the obtained results confirmed the possibility of using tested elastomeric composites in the construction of protective gloves and showed an effectivity of the self-healing process for the long-term usage of that protective equipment.

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Self-Healing of Ionomeric Polymers with Carbon Fibers from Medium-Velocity Impact and Resistive Heating

Smart Materials Research ◽

10.1155/2013/271546 ◽

2013 ◽

Vol 2013 ◽

pp. 1-12 ◽

Cited By ~ 8

Author(s):

Vishnu Baba Sundaresan ◽

Andrew Morgan ◽

Matt Castellucci

Keyword(s):

Carbon Fiber ◽

Polymer Matrix ◽

Materials Science ◽

Polymeric Materials ◽

Complete Recovery ◽

Self Healing ◽

Resistive Heating ◽

Velocity Impact ◽

The Impact ◽

Composite Self

Self-healing materials science has seen significant advances in the last decade. Recent efforts have demonstrated healing in polymeric materials through chemical reaction, thermal treatment, and ultraviolet irradiation. The existing technology for healing polymeric materials through the aforementioned mechanisms produces an irreversible change in the material and makes it unsuitable for subsequent healing cycles. To overcome these disadvantages, we demonstrate a new composite self-healing material made from an ionomer (Surlyn) and carbon fiber that can sustain damage from medium-velocity impact and heal from the energy of the impact. Furthermore, the carbon fiber embedded in the polymer matrix results in resistive heating of the polymer matrix locally, melts the ionomer matrix around the damage, and heals the material at the damaged location. This paper presents methods to melt-process Surlyn with carbon fiber and demonstrates healing in the material through medium-velocity impact tests, resistive heating, and imaging through electron and optical microscopy. A new metric for quantifying self-healing in the sample, called width-heal ratio, is developed, and we report that the Surlyn-carbon fiber-based material under an optimal rate of heating and at the correct temperature has a width-heal ratio of >0.9, thereby demonstrating complete recovery from the damage.

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Preparation and Performance of Self-Healing Epoxy Composites by Microcapsulated Approach

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.636.73 ◽

2014 ◽

Vol 636 ◽

pp. 73-77 ◽

Cited By ~ 1

Author(s):

Xin Hua Yuan ◽

Qiu Su ◽

Li Yin Han ◽

Qian Zhang ◽

Yan Qiu Chen ◽

...

Keyword(s):

Impact Strength ◽

Epoxy Matrix ◽

The Self ◽

Epoxy Composites ◽

Fracture Plane ◽

Crack Plane ◽

Curing Agent ◽

Self Healing ◽

Healing Agent ◽

The Impact

Microencapsulated E-51 epoxy resin healing agent and phthalic anhydride latent curing agent were incorporated into E-44 epoxy matrix to prepare self-healing epoxy composites. When cracks were initiated or propagated in the composites, the microcapsules would be damaged and the healing agent released. As a result, the crack plane was healed through curing reaction of the released epoxy latent curing agent. In the paper, PUF/E-51 microcapsules were prepared by in-situ polymerization. The mechanical properties of the epoxy composites filled with the self-healing system were evaluated. The impact strength and self-healing efficiency of the composites are measured using a Charpy Impact Tester. Both the virgin and healed impact strength depends strongly on the concentration of microcapsules added into the epoxy matrix. Fracture of the neat epoxy is brittle, exhibiting a mirror fracture surface. Addition of PUF/E-51 microcapsules decreases the impact strength and induces a change in the fracture plane morphology to hackle markings. In the case of 8.0 wt% microcapsules and 3.0 wt% latent hardener, the self-healing epoxy exhibited 81.5% recovery of its original fracture toughness.

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The Impact of Different Polydimethylsiloxane Core Materials on the Properties of Melamine Formaldehyde Microcapsules

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.694.58 ◽

2016 ◽

Vol 694 ◽

pp. 58-63 ◽

Cited By ~ 1

Author(s):

Hafeez Ullah ◽

Khairun Azizi Azizli ◽

Zakaria Man ◽

Muhammad Irfan Khan

Keyword(s):

Core Material ◽

Self Healing ◽

Melamine Formaldehyde ◽

Water Emulsion ◽

Electron Dispersive Spectroscopy ◽

Oil In Water ◽

Ft Ir ◽

Oil In Water Emulsion ◽

The Impact ◽

Thermal Stability Of

Three different functionalized polydimethylsiloxane based probable self-healing materials were encapsulated by oil-in-water emulsion polymerization melamine-formaldehyde (MF) microcapsules for future applications in self-healing composites systems. The diameter and morphology, thermal properties, and structural analysis of the synthesized microcapsules were determined by scanning electron microscope (SEM), thermogravimetric analysis (TGA), Fourier-transform infrared spectroscopy (FT-IR), and electron dispersive spectroscopy (EDS). The results showed that nature of core material plays an important role in the morphology and thermal stability of the microcapsules.

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Investigative Study of Partial Replacement of Cement with Bio-Cement, Fly Ash and Natural Pozzolans

Turkish Journal of Computer and Mathematics Education (TURCOMAT) ◽

10.17762/turcomat.v12i1s.1891 ◽

2021 ◽

Vol 12 (1S) ◽

pp. 432-436

Author(s):

Dr.Sarvesh, Et. al.

Keyword(s):

Compressive Strength ◽

Fly Ash ◽

Main Property ◽

Partial Replacement ◽

Self Healing ◽

Split Tensile Strength ◽

Conventional Concrete ◽

Quality Properties ◽

Natural Pozzolans ◽

The Impact

Concrete is usually a combination of cement, coarse particles (aggregates and Sand) and water. It is used to design and improve the infrastructures.It is used to design and improve the infrastructures. Concrete has many advantages and disadvantage. The main property that is characteristic to a concrete’s workability is its compressive strength. Only through this single test, one can judge if cementing has been done appropriately. Possible advancements for development include the use of non-traditional and creative materials, and the reuse of waste materials with a specific end goal to replenish the absence of specific assets and to discover alternative ways to monitor the Earth..This investigation concentrate on Compressive strength, flexural and split tensile strength of Conventional Concrete (CC) and Class C fly ash remains with bio-cement and natural pozzolans to consider the impact of bio-concrete with blend extents of 0%,0.25%,0.5%,1% and 1.5% on quality properties. Moreover, effective self-healing usually occurred due to the use of polymers, microorganism and additional cementing material. It is the key issue to find out the self-healing efficiency’s effect to sealing the crack width successfully. And good resistance was observed during the bacterial chemical process against the freeze and thaw attacks.

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