Evaluation of Engineered Cementitious Composites (ECC) containing Polyvinyl Alcohol (PVA) fibers under compressive, direct tensile, and drop-weight test

Rahmati, Komei; Saradar, Ashkan; Moein, Mohammad Mohtasham; Sardrinejad, Iman; Bristow, James; Yavari, Amir; Karakouzian, Moses

doi:10.1007/s41939-022-00135-8

Cited by 13 publications

(4 citation statements)

References 85 publications

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“…Concrete is considered one of the oldest building materials in the world [20]. From the past until now, this valuable material has played a significant role in the development of modern society, which includes the construction of road networks, water supply systems, construction of buildings and structures, dams, bridges, and health infrastructure [20][21][22][23]. Concrete is at the top of the list of the most popular artificial materials in the world [24][25][26].…”

Section: Construction Industry: Prospects and Challengesmentioning

confidence: 99%

A Critical Review Examining the Characteristics of Modified Concretes with Different Nanomaterials

Mohtasham Moein,

Rahmati,

Saradar

et al. 2024

Materials

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The movement of the construction industry towards sustainable development has drawn attention to the revision of concrete. In addition to reducing pollution, the use of nano-materials should lead to the provision of higher quality concrete in terms of regulatory items (workability, resistance characteristics, durability characteristics, microstructure). The present study investigates 15 key characteristics of concrete modified with nano-CaCO3, nano-clay, nano-TiO2, and nano-SiO2. The results of the study showed that nanomaterials significantly have a positive effect on the hydration mechanism and the production of more C-S-H gel. The evaluation of resistance characteristics also indicates the promising results of these valuable materials. The durability characteristics of nano-containing concrete showed significant improvement despite high dispersion. Concrete in coastal areas (such as bridges or platforms), concrete exposed to radiation (such as hospitals), concrete exposed to impact load (such as nuclear power plants), and concrete containing recycled aggregate (such as bricks, tiles, ceramics) can be effectively improved by using nanomaterials. It is hoped that the current review paper can provide an effective image and idea for future applied studies by other researchers.

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Section: Construction Industry: Prospects and Challengesmentioning

confidence: 99%

A Critical Review Examining the Characteristics of Modified Concretes with Different Nanomaterials

Mohtasham Moein,

Rahmati,

Saradar

et al. 2024

Materials

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“…ECCs are prepared using cement mortar as the matrix, fine quartz sand as the aggregate, and a certain amount of soft fibre (usually PVA fibre or PE fibre). The ultimate tensile strains of ECCs are 3~12%, which are several hundred times those of ordinary cementitious materials; additionally, the damage shows multiple obvious cracking patterns, and the cracks can all be maintained at approximately 60 µm [9][10][11]. It can be concluded that ECCs have good toughness and meet the requirements of complex toughness, crack resistance, and durability.…”

Section: Introductionmentioning

confidence: 99%

Optimisation of the Mechanical Properties and Mix Proportion of Multiscale-Fibre-Reinforced Engineered Cementitious Composites

Yang,

Wang,

Chen

et al. 2023

Polymers

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Engineered cementitious composites (ECCs) are cement-based composite materials with strain-hardening and multiple-cracking characteristics. ECCs have multiscale defects, including nanoscale hydrated silicate gels, micron-scale capillary pores, and millimetre-scale cracks. By using millimetre-scale polyethylene (PE) fibres, microscale calcium carbonate whiskers (CWs), and nanoscale carbon nanotubes (CNTs) as exo-doped fibres, a multiscale enhancement system was formed, and the effects of multiscale fibres on the mechanical properties of ECCs were tested. The Box-Behnken experimental design method, which is a response surface methodology, was used to construct a quadratic polynomial regression equation to optimise ECC design and provide an optimisation of ECC mix proportions. The results of this study showed that a multiscale reinforcement system consisting of PE fibres, CWs, and CNTs enhanced the mechanical properties of ECCs. CWs had the greatest effect on the compressive strengths of highly ductile-fibre-reinforced cementitious composites, followed by CNTs and PE fibres. PE fibres had the greatest effect on the flexural and tensile strengths of high-ductility fibre-reinforced cementitious composites, followed by CWs and CNTs. The final optimisation results showed that when the ECC matrix was doped with 1.55% PE fibres, 2.17% CWs, and 0.154% CNTs, the compressive strength, flexural strength, and tensile strength of the matrix were optimal.

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“…Notably, polyvinyl alcohol fiber (PVA) significantly influences the performance of cementitious composites [3]. Rahmati et al highlighted that the introduction of 2% PVA fibers resulted in substantial improvements in the maximum compressive strength of concrete, reaching values of 17% and 56% [4]. The incorporation of fibers yields substantial enhancements in both the tensile and compressive characteristics of concrete.…”

Section: Introductionmentioning

confidence: 99%

Fiber Synergy of Polyvinyl Alcohol and Steel Fibers on the Bond Behavior of a Hybrid Fiber-Reinforced Cementitious Composite

Liu,

Han

2024

Materials

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Based on multi-scale characteristics inherent in the cracking process of cementitious composites, fibers with different geometric dimensions are simultaneously used to restrain the formation and development of cracks at different scales. Accordingly, hybrid fiber-reinforced cementitious composites (HyFRCCs) exhibit excellent bond behavior and deformation capacity in terms of tension and compression, accompanied by higher damage tolerance. Using these benefits of the mechanical properties of HyFRCCs, the structural performance of HyFRCC structures under complex loading conditions can be improved. To objectively evaluate the contributions of all fibers to the mechanical properties of HyFRCCs, steel macro-fibers, and polyvinyl alcohol (PVA) micro-fibers were used to design several reinforced cementitious composites. Four of the specimens were mono-fibrous cementitious composites, three specimens were cementitious composites reinforced with hybrid fibers, and one was a non-fibrous cementitious composite. The synergy effect of the steel and PVA fibers was analyzed using various fiber combinations. The results indicated a significant enhancement of the bonding properties of HyFRCCs through the incorporation of PVA and steel fibers. Specifically, the peak bond strength, peak slip displacement, and residual bond strength exhibited increments ranging from 31.0% to 41.7%, 60.6% to 118.4%, and 34.6% to 391.3%, respectively, in comparison to the reference test block. Notably, the combined presence of the PVA and steel fibers consistently demonstrated a positive confounding effect on the residual bond strength. However, negative confounding effects were observed in terms of the peak bond strength and peak slip displacement, particularly with 1.0% steel fiber content and 0.5% PVA fiber content.

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Evaluation of Engineered Cementitious Composites (ECC) containing Polyvinyl Alcohol (PVA) fibers under compressive, direct tensile, and drop-weight test

Cited by 13 publications

References 85 publications

A Critical Review Examining the Characteristics of Modified Concretes with Different Nanomaterials

A Critical Review Examining the Characteristics of Modified Concretes with Different Nanomaterials

Optimisation of the Mechanical Properties and Mix Proportion of Multiscale-Fibre-Reinforced Engineered Cementitious Composites

Fiber Synergy of Polyvinyl Alcohol and Steel Fibers on the Bond Behavior of a Hybrid Fiber-Reinforced Cementitious Composite

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