Preparation and evaluation of waste PET derived polyurethane polymer modified bitumen through in situ polymerization reaction

Padhan, Rabindra Kumar; Gupta, Anurag

doi:10.1016/j.conbuildmat.2017.09.147

Cited by 69 publications

(22 citation statements)

References 20 publications

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“…ey have been proven to effectively reduce shrinkage and to enhance the ductility of concrete [13][14][15][16][17]. Recently, the environmental benefits of using these waste materials will encourage engineers to use them in engineering structures such as shotcrete support [18].…”

Section: Introductionmentioning

confidence: 99%

“…Fadhil and Yaseen [25] reported that when compared with plain concrete, the rupture strength and impact resistance of concrete panel mixed with PET fibers increased by 34.27% and 157.14%, respectively. In addition, PET fibers were usually added into the asphalt mixture or bitumen, and the results showed that adding PET fibers increased the resistance to permanent deformation and rutting of substrate [14,[26][27][28]. Khalid et al [29] investigated the pullout strengths of PET fibers in a concrete matrix by conducting splitting tensile and pullout tests; the author found that the incorporation of high-volume PET fiber activated the failure resistance mechanisms and thereby improved the tensile strength of concrete; it was also found that ring-shaped PET fibers performed better than irregularly shaped PET.…”

Section: Introductionmentioning

confidence: 99%

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Effects of PET Fibers on Pumpability, Shootability, and Mechanical Properties of Wet‐Mix Shotcrete

Cui

Liu

Wang

et al. 2019

Advances in Civil Engineering

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Polyethylene terephthalate (PET) fiber from waste plastic bottles is an environmentally friendly fiber that can improve the mechanical properties of wet-mix shotcrete. The main objective of this paper is to investigate the effects of PET fiber parameters on pumpability, shootability, and mechanical properties of wet-mix shotcrete. For this purpose, the orthogonal test based on three factors and three levels was conducted. The width, length, and content of PET fiber were selected as the experimental variables. The tests of wet-mix shotcrete reinforced by PET fibers were carried out, along with properties tests such as slump, pressure drop, build-up thickness, compressive strength, and splitting strength. The results showed the change trend of shotcrete performances with increasing PET fiber parameters (width, length, and content). According to the orthogonal test, PET fiber parameters were determined (1 mm width, 20 mm length, and 5 kg/m3 content). Furthermore, relationships between slump and pumpability and shootability were explored, as well as the relationships between pumpability, shootability, and mechanical properties. It was found that pressure drop and compressive strength had the strongest negative linear relationship among all fitting relationships. We hoped that this study could contribute the useful information for the application of wet-mix shotcrete mixed with PET fibers.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of PET Fibers on Pumpability, Shootability, and Mechanical Properties of Wet‐Mix Shotcrete

Cui

Liu

Wang

et al. 2019

Advances in Civil Engineering

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“…Consequently, new technologies to utilize PET wastes are in high demand to maximize recycling and avoid landfilling or incineration. The problem of PET waste could be solved by physical or chemical utilization [16,17]. One of the major advantages of chemical utilization is the production of aromatic polyester polyols (APPs), which are used to form polyurethane foams.…”

mentioning

confidence: 99%

Closed Cell Rigid Polyurethane Foams Based on Low Functionality Polyols: Research of Dimensional Stability and Standardised Performance Properties

et al. 2020

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Currently, polyurethane foam producers come across the several problems when petroleum-based polyols are replaced with low functionality biomass, or waste-based, polyols. In addition, the dilemma is intensified with regulations that require full or partial replacement of blowing agents that can cause high ozone depletion with alternatives like water, which causes the formation of CO2. Therefore, these gases diffuse out of the foam so quickly that the polymeric cell walls cannot withstand the pressure, consequently causing huge dimensional changes at ambient temperature and humidity. Even though the theoretical stoichiometric balance is correct, the reality shows that it is not enough. Therefore, polyethylene terephthalate waste-based polyol was chosen as a low functionality polyol which was modified with high functionality sucrose-based polyol in order to obtain dimensionally stable polyurethane foams in the density range of 30–40 kg/m3. These more stable foams are characterized by linear changes no higher than 0.5%, short-term water absorption by partial immersion no higher than 0.35 kg/m2, and water vapor resistance factors up to 50. In order to obtain thermally efficient polyurethane foams, conventional blowing agents and water systems were implemented, thus, assuring thermal conductivity values in the range of 0.0198–0.0204 W/(m·K) and obtaining products which conform to all the requirements for performance of sprayed and factory-made polyurethane foam standards EN 14315-1 and EN 13165.

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“…However, in this study, the used polymers were completely manufactured and developed at a local level. In addition, back in 2015, studies [32][33][34] analyzing the efficient use of polyurethane-foam-modified bitumen [35] proposed a completely new approach of developing in situ polymerization of monomers that was derived from PET wastes. In these studies, the materials were replaced by up to 10%.…”

Section: Literature Reviewmentioning

confidence: 99%

Saving Energy in the Transportation Sector: An Analysis of Modified Bitumen Application Based on Marshall Test

Shah

Arshad²,

Waqar³

et al. 2018

Energies

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Energy consumption and material production are two major factors associated with the road construction industry. Worldwide, millions of tons of hot mix asphalt production consume a huge amount of fuel as an energy source in terms of quantity and cost to achieve the standard temperature of up to 170 °C during the mixing process. Modification of bitumen can not only reduce its usage but also the consumption of energy (fuel) during the asphalt mix production process at low temperatures. This study provides a method to save energy by proposing the addition of bitumen modifier in the road construction sector. Furthermore, to make it compatible with the field conditions for road construction, stability analysis is executed on the prepared samples by partially replacing the bitumen with polyurethane foam (PUF) and plastic waste (PW) (at 10%, 20%, 30%, 40%, and 50%). Experimental results demonstrate a reasonable saving in the amount of energy (33%) and material (40% bitumen) used and showed that similar strength of developed asphalt mix can be achieved using PUF. An extensive calculation concludes that these savings could make a huge difference in construction economics of mega road infrastructure projects, especially during an energy crisis.

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Preparation and evaluation of waste PET derived polyurethane polymer modified bitumen through in situ polymerization reaction

Cited by 69 publications

References 20 publications

Effects of PET Fibers on Pumpability, Shootability, and Mechanical Properties of Wet‐Mix Shotcrete

Effects of PET Fibers on Pumpability, Shootability, and Mechanical Properties of Wet‐Mix Shotcrete

Closed Cell Rigid Polyurethane Foams Based on Low Functionality Polyols: Research of Dimensional Stability and Standardised Performance Properties

Saving Energy in the Transportation Sector: An Analysis of Modified Bitumen Application Based on Marshall Test

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