Engineering properties and environmental impact assessment of green concrete prepared with PVC waste powder: A step towards sustainable approach

Manjunatha, M.; Seth, Dinesh; Kvgd, Balaji; Bharath, A.

doi:10.1016/j.cscm.2022.e01404

Cited by 27 publications

(19 citation statements)

References 39 publications

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“…Concrete is a kind of quasi-brittle material widely used in various engineering fields [ 5 ]. In order to improve the structural properties of concrete, researchers have developed a variety of concrete types [ 6 , 7 , 8 , 9 ]. At present, the research on the fracture process of concrete materials mostly uses plain concrete for fracture simulation [ 10 , 11 , 12 ], and conducts experimental research [ 13 , 14 , 15 , 16 ] to reveal its fracture characteristics [ 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Investigation into the Time-Dependent Crack Propagation Rate of Concrete

2023

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Mass concrete structures under long-term loads are susceptible to time-dependent fractures, which pose a threat to their structural integrity and safety. In order to study the crack growth rate of concrete materials under long-term constant load, the data were processed according to the calculation method of fatigue crack growth rate. The relationship between the crack growth rate and strength factor in the stable growth stage was obtained using the Paris formula. The experimental data and theoretical analysis show that the time-dependent fracture curve CMOR(t)-t of the standard three-point bending beam specimens could be divided into three stages. The relationship between the crack propagation rate da/dt(t) in the second stage and the intensity factor K(t) could be well described by the Paris formula. The life of crack growth of a standard three-point curved beam is inversely proportional to the level of constant load. These conclusions can provide data support for further studies on crack extension life under long-term constant load.

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Section: Introductionmentioning

confidence: 99%

Investigation into the Time-Dependent Crack Propagation Rate of Concrete

2023

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“…This motivate the study of the thermal stability and characteristics of a film made of a wPVC pipe (wPVCf) at temperatures below 250°C. wPVC tubes are very abundant due to their use in water distribution service: about 66% of water related distributive infrastructure and 75% in sanitary sewer pipe applications 14 . Due to easy solubility of wPVC in common solvents it can be recycled into second (or third life) applications.…”

Section: Introductionmentioning

confidence: 99%

“…13 It is known that PVC decomposes slowly at low temperatures, however, its fast decomposition starts at temperatures above 250 C. This motivate the study of the thermal stability and characteristics of a film made of a wPVC pipe (wPVCf) at temperatures below 250 C. wPVC tubes are very abundant due to their use in water distribution service: about 66% of water related distributive infrastructure and 75% in sanitary sewer pipe applications. 14 Due to easy solubility of wPVC in common solvents it can be recycled into second (or third life) applications. For this purpose, the kinetics parameters of wPVCf, the activation energy barrier (E a ), pre-exponential factor in Arrhenius equation (A), 15 and the reaction mechanism expressed in the form of the functions of f(α), a function related to the progression of the reaction (α) were evaluated experimentally.…”

Section: Introductionmentioning

confidence: 99%

Upcycling poly(vinyl chloride) waste tubes: Studies of thermal stability and kinetics of films made of waste polyvinylchloride tube at the initial steps of degradation

Hamidi

2023

J of Applied Polymer Sci

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Polyvinylchloride (PVC) tubing products almost have replaced cast iron sewer and piping systems for water and wastewater collections; it also replaced metal and wood in window frames in construction. PVC has a high value, and its resin production continues to grow yearly at a considerable rate. Availability of the disposed or postconsumer PVC (wPVC) mimics a pseudo-renewable resource of wPVC, which creates many upcycling, recycling, and downcycling that result in many economic opportunities, besides reducing its burden on the environment while saving energy. This work presents the thermal characteristics of a film made of wPVC (wPVCf). Six samples of wPVCf were analyzed by its own heating, rate appropriate for kinetics properties evaluation, using a thermogravimetric analysis (TGA) instrument. The isoconversional degradation energy barrier (E a,α ) values were evaluated by applying 14 kinetic models, f(α), to the TGA data assuming that the degradation process follows a pseudosingle component model. The values of E α,α obtained from all models for each given α value were close to each other with a standard deviation of less than 0.1 kJ mol À1 indicating the validity of the method. The results were consistent with the kinetics data reported in the literature for pure PVC.

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“…Then, Merlo et al used PVC waste as an additional aggregate in light mortar production . Moreover, Manjunatha et al also studied and compared the environmental impact and energy needs for concrete production, which used PVC waste powder and conventional concrete . Despite the successful report of PVC waste that several researchers have published, the accumulation of PVC waste increases continuously due to increasing PVC production for daily use.…”

Section: Introductionmentioning

confidence: 99%

Electrospun Nanofibers from Waste Polyvinyl Chloride Loaded Silver and Titanium Dioxide for Water Treatment Applications

Zulfi,

Hartati,

Nur’aini

et al. 2023

ACS Omega

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The electrospun nanofiber membrane from polyvinyl chloride (PVC) waste for water treatment applications has been successfully produced. The PVC precursor solution was prepared by dissolving the PVC waste in DMAc solvent, and a centrifuge was used to separate undissolved materials from the precursor solution. Ag and TiO2 were added to the precursor solution before the electrospinning process. We studied the fabricated PVC membranes using SEM, EDS, XRF, XRD, and FTIR to study the fiber and membrane properties. The SEM images depicted that Ag and TiO2 addition has changed the morphology and size of fibers. The EDS images and XRF spectra confirmed the presence of Ag and TiO2 on the nanofiber membrane. The XRD spectra showed the amorphous structure of all membranes. The FTIR result indicated that the solvent completely evaporated throughout the spinning process. The fabricated PVC@Ag/TiO2 nanofiber membrane showed the photocatalytic degradation of dyes under visible light. The filtration test on the membrane PVC and PVC@Ag/TiO2 depicted that the presence of Ag and TiO2 affected the flux and separation factor of the membrane.

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Engineering properties and environmental impact assessment of green concrete prepared with PVC waste powder: A step towards sustainable approach

Cited by 27 publications

References 39 publications

Investigation into the Time-Dependent Crack Propagation Rate of Concrete

Investigation into the Time-Dependent Crack Propagation Rate of Concrete

Upcycling poly(vinyl chloride) waste tubes: Studies of thermal stability and kinetics of films made of waste polyvinylchloride tube at the initial steps of degradation

Electrospun Nanofibers from Waste Polyvinyl Chloride Loaded Silver and Titanium Dioxide for Water Treatment Applications

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