Effect of polypropylene plastic fibers length on cracking resistance of high performance concrete at early age

Shen, Dejian; Liu, Xingzuo; Zeng, Xuan; Zhao, Xiaoguang; Jiang, Guoqing

doi:10.1016/j.conbuildmat.2019.117874

Cited by 97 publications

(37 citation statements)

References 46 publications

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“…Many such materials provide high compressive strength (30 MPa to 60 MPa), as well as excellent mechanical properties and durability [15][16][17][18]. The inclusion of polypropylene fibers in composites has been shown to enhance the tensile strength and volume stability of non-cement blended materials [19][20][21]. In recent years, a number of researchers have studied the use of polypropylene fibers or non-cement blended materials; however, there has been little work on the addition of polypropylene fibers to non-cement blended materials.…”

Section: Introductionmentioning

confidence: 99%

Composite Properties of Non-Cement Blended Fiber Composites without Alkali Activator

Lin

Korniejenko

et al. 2020

Materials

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The vigorous promotion of reuse and recycling activities in Taiwan has solved a number of problems associated with the treatment of industrial waste. Considerable advances have been made in the conversion of waste materials into usable resources, thereby reducing the space required for waste storage and helping to conserve natural resources. This study examined the use of non-alkali activators to create bonded materials. Our aims were to evaluate the feasibility of using ground-granulated blast-furnace slag (S) and circulating fluidized bed co-fired fly ash (F) as non-cement binding materials and determine the optimal mix proportions (including embedded fibers) with the aim of achieving high dimensional stability and good mechanical properties. Under a fixed water/binder ratio of 0.55, we combined S and F to replace 100% of the cement at S:F ratios of 4:6, 5:5, 6:4. Polypropylene fibers (L/d = 375) were also included in the mix at 0.1%, 0.2% and 0.5% of the volume of all bonded materials. Samples were characterized in terms of flowability, compressive strength, tensile strength, water absorption, shrinkage, x-ray diffraction (XRD) and scanning electron microscope (SEM) analysis. Specimens made with an S:F ratio of 6:4 achieved compressive strength of roughly 30 MPa (at 28 days), which is the 80% the strength of conventional cement-based materials (control specimens). The inclusion of 0.2% fibers in the mix further increased compressive strength to 35 MPa and enhanced composite properties.

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Section: Introductionmentioning

confidence: 99%

Composite Properties of Non-Cement Blended Fiber Composites without Alkali Activator

Lin

Korniejenko

et al. 2020

Materials

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“…Therefore, in order to promote sustainable concrete production, improvement of its properties by using innovative components should also be taken into account [6,7]. One of the ways to improve the properties of concrete and increase the bending strength of concrete structures is the use of various additives in the form of steel fibers [8,9], glass [10], fibers of natural and organic origin [11], as well as polymer fibers, i.e., polypropylene fibers [12,13] made of polyalcohol vinyl [14]. These fibers have become an effective material for strengthening cement materials, and for health-related and economic reasons are an alternative to asbestos, steel, and glass fibers [15].…”

Section: Introductionmentioning

confidence: 99%

Properties of Fibrous Concrete Made with Plastic Optical Fibers from E-Waste

2020

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This article presents research results relating to the potential for waste utilization in the form of polymer optical fiber (POF) scraps. This material is difficult to recycle due to its diverse construction. Three different volumes of POF were used in concrete in these tests: 1%, 2%, and 3%. The experimental studies investigated the basic properties of the concrete, the elastic and dynamic moduli, as well as deformation and deflection of reinforced beams. The microstructures, including the interfacial transition zones (ITZs), were recorded and analyzed using a scanning electron microscope. It was observed that 180 freezing–thawing cycles reduced the concrete frost resistance containing 3% POFs by half compared to the control concrete. The resistance to salt crystallization of this concrete decreased by about 55%. POFs have significant effects on the splitting tensile and flexural strengths compared to the compressive strength. The control beams were destroyed during the four-point static bending tests at half the force applied to the beams that were reinforced with POFs.

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“…This necessitates the search for new types of concrete, the mechanical properties of which will meet the current requirements. One of the methods to reduce the negative effects of shrinkage cracks in addition to classic bar reinforcement is the reinforcement of concrete with short, randomly distributed steel fibers (SF) [ 2 , 3 , 4 , 5 , 6 , 7 , 8 ], polypropylene (PP) [ 2 , 9 , 10 , 11 , 12 ] and hybrid fibers [ 13 , 14 , 15 ]. There are several articles on the quite controversial use of human hair as dispersed concrete reinforcement [ 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

“…By using FRC, architects and designers have greater architectural freedom in designing the shapes and forms of structural elements because the use of steel reinforcement bars can be almost eliminated. Many factors influence the mechanical properties of the fiber-reinforced concrete [ 1 , 2 , 3 , 4 , 5 , 6 , 9 , 12 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 ]. These factors include the type of fibers, their geometry, surface structure, quantity in the concrete mix, fibers aspect ratio, mixture design and mixture densification, as well as the laying and curing methods [ 29 , 30 ].…”

Section: Introductionmentioning

confidence: 99%

Flexural Behavior of Composite Concrete Slabs Made with Steel and Polypropylene Fibers Reinforced Concrete in the Compression Zone

et al. 2020

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The paper presented aimed at examining the effect of a fiber-reinforced concrete layer in the compressed zone on the mechanical properties of composite fiber-reinforced concrete slabs. Steel fibers (SF) and polypropylene fibers (PP) in the amount of 1% in relation to the weight of the concrete mix were used as reinforcement fibers. The mixture compositions were developed for the reference concrete, steel fiber concrete and polypropylene fiber concrete. The mechanical properties of the concrete obtained from the designed mixes such as compressive strength, bending strength, modulus of elasticity and frost resistance were tested. The main research elements, i.e., slabs with a reinforced compression zone in the form of a 30 mm layer of concrete with PP or SF were made and tested. The results obtained were compared with a plate made without a strengthening layer. The bending resistance, load capacity and deflection tests were performed on the slabs. A scheme of crack development during the test and a numerical model for the slab element were also devised. The study showed that the composite slabs with fiber-reinforced concrete with PP in the upper layer achieved 12% higher load capacity, with respect to the reference slabs.

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Effect of polypropylene plastic fibers length on cracking resistance of high performance concrete at early age

Cited by 97 publications

References 46 publications

Composite Properties of Non-Cement Blended Fiber Composites without Alkali Activator

Composite Properties of Non-Cement Blended Fiber Composites without Alkali Activator

Properties of Fibrous Concrete Made with Plastic Optical Fibers from E-Waste

Flexural Behavior of Composite Concrete Slabs Made with Steel and Polypropylene Fibers Reinforced Concrete in the Compression Zone

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