RETRACTED: Polypropylene fiber reinforced cement mortars containing rice husk ash and nano-alumina

Mohseni, Ehsan; Khotbehsara, Mojdeh Mehrinejad; Naseri, Farzad; Monazami, Maryam; Sarker, Prabir Kumar

doi:10.1016/j.conbuildmat.2016.02.124

Cited by 126 publications

(51 citation statements)

References 31 publications

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“…The nets have been also used in civil engineering field as a recycled fiber in order to reinforce or strengthen concrete, mortar and soil [5,6]. Even during the past three decades, the use of synthetic fiber, such as polyvinyl alcohol (PVA) fiber and polypropylene fiber has been paid attention, and it is successful in significantly improving mechanical properties, such as flexural strength, fracture toughness, and impact resistance, of fiber reinforced mortar and concrete [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. However, using of those fibers surely leads to higher energy consumption and emission for production process [6].…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of recycled nylon fiber from waste fishing net with respect to fiber reinforced mortar

Orasutthikul

Unno

Yokota

2017

Construction and Building Materials

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h i g h l i g h t sThe effects of recycled nylon fiber mixed in mortar on flexural behavior are focused. Improvement of flexural strength and toughness are observed by using recycled nylon fiber. Post peak behavior is directly affected by bond strength between fiber and matrix. a b s t r a c tThis paper discusses the utilization of recycle waste fishing nets in fiber reinforced mortar. Experimental test results compared the mechanical properties of such mortar made with recycled nylon fiber to those of such mortar made with recycled PET and PVA (polyvinyl alcohol) short fibers. The recycled nylon (RNylon) fibers were obtained by manually cutting of waste fishing nets to the lengths of 20 mm, 30 mm and 40 mm. Two types of R-Nylon fibers were investigated that are straight and knotted types. The addition of straight R-Nylon fiber improved the flexural strength up to 41% in comparison with that of the knotted R-Nylon, recycled PET, and PVA fibers. The compressive strength of the mortar with R-Nylon fiber decreased with increase in fiber fraction and length. The post peak load, toughness and residual strength depended on the properties of fiber such as Young's modulus, tensile strength, and geometry as well as the bond strength between fiber and matrix.

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Section: Introductionmentioning

confidence: 99%

Effectiveness of recycled nylon fiber from waste fishing net with respect to fiber reinforced mortar

Orasutthikul

Unno

Yokota

2017

Construction and Building Materials

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“…A wide spectrum of fibers with various physical, mechanical, and chemical properties are used for cementitious matrix reinforcement. Among accessible and applicable fibers in cementitious composites, steel, polypropylene (PP), glass carbon, and basalt fibers have been taken into account [17][18][19]. Figure 1 shows a schematic of fiber's effect on the concrete fracture process under tensile loading.…”

Section: Introductionmentioning

confidence: 99%

Restrained Shrinkage Cracking of Fiber-Reinforced High-Strength Concrete

Saradar

Tahmouresi

Mohseni

et al. 2018

Fibers

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Concrete shrinkage and volume reduction happens due to the loss of moisture, which eventually results in cracks and more concrete deformation. In this study, the effect of polypropylene (PP), steel, glass, basalt, and polyolefin fibers on compressive and flexural strength, drying shrinkage, and cracking potential, using the ring test at early ages of high-strength concrete mixtures, was investigated. The restrained shrinkage test was performed on concrete ring specimens according to the ASTM C1581 standard. The crack width and age of restrained shrinkage cracking were the main parameters studied in this research. The results indicated that the addition of fiber increases the compressive strength by 16%, 20%, and 3% at the age of 3, 7, and 28 days, respectively, and increases the flexural toughness index up to 7.7 times. Steel and glass fibers had a better performance in flexural strength, but relatively poor action in the velocity reduction and cracking time of the restrained shrinkage. Additionally, cracks in all concrete ring specimens except for the polypropylene-containing mixture, was developed to a full depth crack. The mixture with polypropylene fiber indicated a reduction in crack width up to 62% and an increasing age cracking up to 84%.

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“…Due to high specific area of RHA, a more homogenous and a denser paste is created with lesser porosity and lesser width of interfacial zone between the paste and the aggregate [19]. Thus, the strength is increased.…”

Section: Compressive Strengthmentioning

confidence: 99%

“…This may be because the addition of fibers can aid in disrupting or breaking the continuity and interconnectivity of porous channels existing in the composite, thus resulting in lower sorptivity. Also, addition of RHA significantly reduces the water absorption compared with the plain mortar sample, because of the formation of dense C-S-H gel structure reducing the porosity, blocking the capillaries inside the paste [13,19]. The Fig.…”

Section: Coefficient Of Water Absorption and The Rate Of Water Absorpmentioning

confidence: 99%

Combined effects of rice husk ash and nylon fiber on engineering properties of cement mortar

2020

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Utilization of waste materials is of utmost importance in creating a sustainable future. Industrial waste as well as recycled materials are used as supplementary cementitious materials in order to preserve the environment as well as to enhance the properties of the construction material. In the reporting work, rice husk ash (RHA) and nylon fibers were added to cement mortar (a mixture of cement, sand and water) to investigate their individual, as well as combined effect on flexural and compressive strengths, sorptivity, and abrasion resistance of cement mortar. Test results obtained in this study indicate that RHA can be blended up to 10% by weight of cement to obtain higher flexural and compressive strengths as the addition of RHA improves the strength of the cement paste by enhancing the production of calcium-silicatehydrate. Nylon fiber reinforcement with 0.5 vol% showed efficient increment in flexural and compressive strengths of the mortar as a result of fibers holding the elements of the composite together. Replacement of cement with 10 wt% RHA effectively reduced the sorptivity of mortar as the addition of RHA results in the formation of a dense calcium-silicatehydrate structure reducing the porosity and blocking the capillaries inside the paste. Addition of 0.5 vol% nylon fiber to the cement replaced with 10 wt% RHA showed an increase in abrasion resistance of the mortar as nylon fibers can retain during longer time period of stress due to their high elasticity. Overall results indicated that the combined addition of rice husk ash and nylon fibers can increase the performance of cement mortar effectively by increasing its mechanical as well as durability properties.

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RETRACTED: Polypropylene fiber reinforced cement mortars containing rice husk ash and nano-alumina

Cited by 126 publications

References 31 publications

Effectiveness of recycled nylon fiber from waste fishing net with respect to fiber reinforced mortar

Effectiveness of recycled nylon fiber from waste fishing net with respect to fiber reinforced mortar

Restrained Shrinkage Cracking of Fiber-Reinforced High-Strength Concrete

Combined effects of rice husk ash and nylon fiber on engineering properties of cement mortar

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