Mechanical, durability, and microstructural properties of macro synthetic polypropylene (PP) fiber-reinforced rubber concrete

Wang, Jiaqing; Dai, Qingli; Si, Ruizhe; Guo, Shuaicheng

doi:10.1016/j.jclepro.2019.06.272

Cited by 207 publications

(88 citation statements)

References 38 publications

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“…A similar finding was reported in the previous study [35], which can be ascribed to the extra air entrained by the rubber particles attached the RTPFs during the mixing process [36,48,49]. Moreover, the addition of fibres whilst mixing may also entrap some air [50]. As shown in Fig.…”

Section: Workability and Air Contentsupporting

confidence: 89%

Flexural fatigue behaviour of recycled tyre polymer fibre reinforced concrete

Chen

Zhong

Zhang

2020

Cement and Concrete Composites

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The utilization of recycled tyre polymer fibre (RTPF) into concrete production is feasible to promote sustainable development and mitigate environmental pollution of global landfilled waste tyres. This paper for the first time presents an experimental study on flexural fatigue behaviour of concrete reinforced with mixed RTPF considering different fibre dosages (i.e., 1.2, 2.4, 4.8 and 9.6 kg/m 3). Results indicate that with the presence of RTPF, the flexural strength of concrete was increased by 3.6-9.6%. The fatigue life of all mixtures followed the two-parameter Weibull distribution and can be accurately predicted using the developed double-logarithm fatigue equations. Concrete reinforced with 4.8 kg/m 3 of RTPF presented the longest fatigue life under different failure probabilities. RTPF and polypropylene fibre (PPF) reinforced concrete exhibited similar fatigue failure mechanisms. 0.2-0.4% Vf of RTPF could substitute around 0.1% Vf of PPF in concrete considering overall static, dynamic and fatigue performance.

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Section: Workability and Air Contentsupporting

confidence: 89%

Flexural fatigue behaviour of recycled tyre polymer fibre reinforced concrete

Chen

Zhong

Zhang

2020

Cement and Concrete Composites

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“…The addition of 20% of rubber particles in concrete revealed an increase in frost resistance of concrete products by 89% with 2/4 fraction [9,10]. Reinforcing concrete containing recycled rubber with synthetic polypropylene fibres increases the loading capacity and deformation of residual flexural strength, thereby increasing the overall toughness while reducing brittleness [11].…”

Section: Introductionmentioning

confidence: 98%

The Properties of Recycled Rubber From Waste Tires in the Production of Cement Composites

Svoboda¹,

Václavík²,

Dvorský³

et al. 2020

GSE

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This article presents the results of a study dealing with the use of a combination of recycled rubber from waste tires as a 100% substitute in the production of cement composites. Aggregate was replaced with recycled rubber in two ratios, namely the ratio of 50/50 and the ratio of 40/60 of the share of fraction 0/1 mm and fraction 1/3 mm. The designed formulas of cement composites were subjected to the tests of their physical and mechanical properties in order to determine the properties of the used recycled rubber combination. The tests included the consistency of the grain curve, mixing water properties, consistency of cement mortar, and strength characteristics (tensile flexural strength and compressive strength). The study presents results that are fundamentally different from the comparative samples and their use in the building industry; however, at the same time, they open up new possibilities of their utilization as a building material.The consistency of fresh mortar was determined by means of a diffusion test carried out according to ČSN EN 1015-3 [18] using a flow table. Determination of tensile flexural strength and compressive strengthThe determination of tensile flexural and compressive strengths was performed after 3, 7 and 28 days of age of the test specimens according to . The testing was carried out using the prepared test specimens with the dimensions of 40x40x160 mm, which were stored in a water bath prior to the test. Formtest instrument with a compressive force of 100KN and 300KN was used as the testing equipment. Determination of hardened mortar densityThe test specimens prepared according to formulas Z2 and Z3 were dried to a stable weight and subsequently tested to determine the density of hardened mortar according to ČSN EN 1015-10 standard [20]. RESULTS AND DISCUSSION Determination of grain-size curve of recycled rubberSieves with mesh sizes of 0.063, 0.125, 0.25, 0.5, 1.0, 1.6, 2.0, 2.5, 3.0, 4.0, and 5.0 mm were used to determine the grain-size curve of rubber granulate with the fractions of 0/1 and 1/3 mm. The resulting grain-size curves are shown in Figure 2. by using admixtures (e.g. plasticizers). At the same time, these results open up new possibilities for the utilization of this material as an environmentally friendly building material. The modifications of this cement compound and further testing of its physical and mechanical properties will be the subject of further research.

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“…For instance, polypropylene (PP), polyvinyl alcohol (PVA) and polyethylene terephthalate (PET) fibers were found to improve the mechanical properties and durability of concrete, such as flexural capacity, flexural toughness, shrinkage resistance and freeze-thaw resistance [ 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ], and adding fibers was found to have a significant effect on the crack bridging and the failure behavior [ 19 , 20 , 21 ]. Moreover, it was found that adding PP fibers improves sulfate resistance and alkali-silica reaction (ASR) expansions [ 22 , 23 , 24 , 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Recycled Nylon Fiber from Waste Fishing Nets as Reinforcement in Polymer Cement Mortar for the Repair of Corroded RC Beams

2020

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Waste fishing nets were utilized as recycled nylon (RN) short fiber to improve the mechanical properties of cement mortar. RN and manufactured polyethylene (PE) fibers were added to polymer cement mortar (PCM) as a reinforcement, and fiber-reinforced PCM was sprayed on the section of reinforced concrete (RC) beams. Normal RC beams and the upgraded RC beams were placed in the tidal zone for 14 months to induce rebar corrosion. Consequently, a repair operation took place by the removal of the concrete cover then spraying fiber-reinforced PCM. The tested RC beams were subjected to four-point flexural tests to study their load-carrying capacity. It was found that the fibers helped transfer stresses through cracks and distribute stresses by transforming a single wide crack into many small cracks. Overall, the experimental results showed that recycled nylon fibers from waste fishing nets have great potential to be used as a strengthening fiber in cementitious material.

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Mechanical, durability, and microstructural properties of macro synthetic polypropylene (PP) fiber-reinforced rubber concrete

Cited by 207 publications

References 38 publications

Flexural fatigue behaviour of recycled tyre polymer fibre reinforced concrete

Flexural fatigue behaviour of recycled tyre polymer fibre reinforced concrete

The Properties of Recycled Rubber From Waste Tires in the Production of Cement Composites

Recycled Nylon Fiber from Waste Fishing Nets as Reinforcement in Polymer Cement Mortar for the Repair of Corroded RC Beams

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