Mechanical properties of polypropylene hybrid fiber-reinforced concrete

Hsie, Machine; Tu, Chijen; Song, P.S.

doi:10.1016/j.msea.2008.05.037

Cited by 396 publications

(168 citation statements)

References 14 publications

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“…Herein, toughness is measured by the area under the P-δ curve up to certain points; the toughness indices I 5 , I 10 , and I 30 are calculated as the ratios of the area under the P-δ curve up to 3, 5.5, and 15.5 times the first crack deflection divided by the area up to the first crack deflection, respectively [31]. While this method had been specified in ASTM C1018 [32], which was withdrawn in 2006, many recent studies in the area of fiber reinforced cement-based materials have used these toughness indices, which normalize the amount of energy absorbed with respect to the first crack energy (e.g., [33][34][35]). …”

Section: Compressive Strength and Flexural Behaviormentioning

confidence: 99%

Properties of Fiber-Reinforced Mortars Incorporating Nano-Silica

Ghazy

Bassuoni

Maguire³

et al. 2016

Fibers

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Repair and rehabilitation of deteriorating concrete elements are of significant concern in many infrastructural facilities and remain a challenging task. Concerted research efforts are needed to develop repair materials that are sustainable, durable, and cost-effective. Research data show that fiber-reinforced mortars/concretes have superior performance in terms of volume stability and toughness. In addition, it has been recently reported that nano-silica particles can generally improve the mechanical and durability properties of cement-based systems. Thus, there has been a growing interest in the use of nano-modified fiber-reinforced cementitious composites/mortars (NFRM) in repair and rehabilitation applications of concrete structures. The current study investigates various mechanical and durability properties of nano-modified mortar containing different types of fibers (steel, basalt, and hybrid (basalt and polypropylene)), in terms of compressive and flexural strengths, toughness, drying shrinkage, penetrability, and resistance to salt-frost scaling. The results highlight the overall effectiveness of the NFRM owing to the synergistic effects of nano-silica and fibers.

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Section: Compressive Strength and Flexural Behaviormentioning

confidence: 99%

Properties of Fiber-Reinforced Mortars Incorporating Nano-Silica

Ghazy

Bassuoni

Maguire³

et al. 2016

Fibers

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“…Machine Hsie, et. al., [4] investigated that the polypropylene fi bres have good ductility, fi neness, and dispersion so they can restrain the plastic cracks. Jianzhuang Xiao, et.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Interaction of Polypropylene Fibres in Latex Modified High Strength Concrete

Thirumurugan¹,

Sivakumar

2013

Archives of Civil Engineering

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Synthetic polymer latexes, such as styrene-butadiene rubber (SBR) latex addition in Portland cement has gained wider acceptance in many applications in the construction industry. Polymer-modifi ed cementitious systems seals the pores and micro cracks developed during hardening of the cement matrix, by dispersing a fi lm of polymer phase throughout the concrete. A comprehensive set of experimental test were conducted for studying the compressive properties of SBR latex polymer with crimped polypropylene fi bres at relative volume fractions of 0.1 and 0.3%. The results indicated that the addition of polypropylene fi bre has little effect on the reduction in the workability of concrete composite containing fl y ash and SBR Latex. Increase in polypropylene fi bres upto 0.3% V f showed increase in compressive strength upto 57.5MPa. The SBR concrete without fi bre showed an increase in strength upto 20 % compared to plain concrete. Test results also indicated that the compressive strength was increased in SBR fi bre concrete by means of an ordinary dry curing process than wet curing because of their excellent water retention due to polymer fi lm formation around the cement grains. On the contrary the compressive strength reduces for SBR fi bre concretes under wet curing compared to dry curing.

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“…However, 3 % fiber added to the concrete absorbs water and cement and creates a powerful mesh structure. Therefore, an increase in viscosity restricts the flow and gives a lower slump value (6 cm) 31,32 . Thus, J. Edgington et al 33 recommend a 2 % steel fiber content maximum and show that as polypropylene fibers are added more than 1 %, they cause a large decrease in workability.…”

Section: Fresh Concrete Testsmentioning

confidence: 99%

The use of natural sepiolite fiber in concrete

Koltka¹,

Uygunoğlu²,

Sabah³

et al. 2017

Mater. Tehnol.

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To determine the effect of sepiolitic fibers on the characteristics of fresh and hardened concrete, i.e., slumping, density, air content, ultrasonic pulse velocity, freeze-thaw, compressive strength, bending and splitting, tensile strength tests were conducted by the addition of de-fibered sepiolite to the cement in ratios of 0.5 %, 1 %, 2 % and 3 % of mass fractions. The fibers support higher slumping for fresh concrete and increased workability. Samples with 1 % and 3 % addition have similar compressive strength values to the reference series after 28 d. The bending strength of the 2 % added sample is closer to the bending strength of the 28-days reference concretes; however, it is reduced for 0.5 %, 1 % and 3 %. For all the reinforcement ratios the splitting strength increased. The highest impact strength performed for a 3 % reinforcement sample increased by 29 % and scanning electron microscopy (SEM) investigations reveal that the white sepiolite fibers are dispersed homogenously in the concrete, and therefore it, reinforce especially at the interface of the aggregate cement paste by increasing durability. Keywords: sepiolite fiber, mechanical activation, fiber reinforced concrete.Za dolo~itev vpliva sepiolitnih vlaken na zna~ilnosti sve`ega in strjenega betona so bili izvedeni; razlivanje pri padcu, gostota, vsebnost zraka, hitrost ultrazvo~nega impulza, zmrznjenje in odtajanje, tla~na trdnost, upogibanje in cepilno natezna trdnost z dodatkom razvlaknjenega sepiolita betonu v masnih dele`ih 0,5 %, 1 %, 2 % in 3 %. Vlakna pospe{ujejo razlivanje sve`ega betona in izbolj{ajo njegovo oblikovalnost. Vzorca z dodatkom 1 % in 3 % sta pokazala podobno tla~no trdnost kot referen~na serija po 28 d. Upogibna trdnost pri vzorcu z 2 % dodatka je zelo blizu upogibni trdnosti referen~nega betona po 28 d; vendar je manj{a pri dodatkih 0,5 %, 1 % in 3 %. Pri vseh dodatkih pa je cepilna trdnost narasla. Najvi{ja udarna`ilavost izvedena pri vzorcu s 3 % dodatkom je narasla za 29 % in preiskava z vrsti~nim elektronskim mikroskopom (SEM) je odkrila, da so bela sepiolitna vlakna homogeno razpr{ena v betonu, zato oja~ajo stik agregata s cementno pasto in pove~ajo trajnost betona. Klju~ne besede: sepiolitna vlakna, mehanska aktivacija, z vlaknom oja~an beton

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Mechanical properties of polypropylene hybrid fiber-reinforced concrete

Cited by 396 publications

References 14 publications

Properties of Fiber-Reinforced Mortars Incorporating Nano-Silica

Properties of Fiber-Reinforced Mortars Incorporating Nano-Silica

Synergistic Interaction of Polypropylene Fibres in Latex Modified High Strength Concrete

The use of natural sepiolite fiber in concrete

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