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Valorization of Waste Polypropylene,...

Pazhankave, Silpa Soman.

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Valorization of Waste Polypropylene, Polyethylene Terephthalate, and Bushings and Insulator Ceramics to Develop Sustainable Cementitious Composites.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Valorization of Waste Polypropylene, Polyethylene Terephthalate, and Bushings and Insulator Ceramics to Develop Sustainable Cementitious Composites./
作者:	Pazhankave, Silpa Soman.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2024,
面頁冊數:	219 p.
附註:	Source: Dissertations Abstracts International, Volume: 86-01, Section: B.
Contained By:	Dissertations Abstracts International86-01B.
標題:	Polymer chemistry. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31329637
ISBN:	9798383192108

Valorization of Waste Polypropylene, Polyethylene Terephthalate, and Bushings and Insulator Ceramics to Develop Sustainable Cementitious Composites.
Pazhankave, Silpa Soman.

Valorization of Waste Polypropylene, Polyethylene Terephthalate, and Bushings and Insulator Ceramics to Develop Sustainable Cementitious Composites. - Ann Arbor : ProQuest Dissertations & Theses, 2024 - 219 p.

Source: Dissertations Abstracts International, Volume: 86-01, Section: B.

Thesis (Ph.D.)--Arizona State University, 2024.

Continuous and increasing generation of solid waste and its effective disposal have become critical challenges, particularly in recent years. The incorporation of waste materials into cementitious mixtures offers a promising solution to divert materials from landfills. However, understanding the impact of waste materials on the properties of cementitious mixtures is essential for their large-scale adoption. This research aims to enhance our understanding of the utilization of three waste materials: polypropylene (PP), polyethylene terephthalate (PET), and ceramic electrical insulators and bushings in cementitious mixtures.The hydrophobic nature of plastics, which causes low adhesion to cement matrix, poses a primary concern for their use in cementitious mixtures. Surface treatment of plastics is an effective method to improve their hydrophilicity. This research investigates ultraviolet (UV) irradiation and bio-grafting for surface treatment. Bio-grafting is a scalable, safe, and considerably faster surface treatment method which utilizes cooking oil and microwave radiation. The benefits of increasing the hydrophilicity of plastics through UV irradiation and bio-grafting on the ductility improvement of plastic-cement composites are established through spectroscopic observation of the plastic surfaces and three-point bend tests on plastic-cement composites. UV irradiation and bio-grafting successfully improved the oxygen functional groups at the plastic's surface, increasing its hydrophilicity. The enhanced hydrophilicity improves plastic-cement adhesion, facilitating stress transfer at the interface, resulting in a significant enhancement in the energy absorption capacity and ductility of the composite. A size effect investigation reveals an{A0}increase in transition size, fracture energy, and effective fracture process zone length, along with a decrease in the brittleness number of cementitious composites with PET modified through bio-grafting, indicating a transition from essentially purely brittle to quasi-brittle behavior.Furthermore, the assessment of the fresh, hardened, and durability properties of concrete with ceramic aggregate against reference concrete with conventional limestone aggregates demonstrates that ceramics are an effective alternative. Ceramic aggregates have no significant impact on mechanical properties but result in improved workability and durability properties in terms of chloride resistance and capillary water absorption. Overall, the research output will contribute to the valorization of some commonly landfilled materials as ingredients in cementitious mixtures, promoting waste diversion from landfills.

ISBN: 9798383192108Subjects--Topical Terms:

3173488
Polymer chemistry.
Subjects--Index Terms:

Cement

Valorization of Waste Polypropylene, Polyethylene Terephthalate, and Bushings and Insulator Ceramics to Develop Sustainable Cementitious Composites.
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500 $a Advisor: Hoover, Christian G.
502 $a Thesis (Ph.D.)--Arizona State University, 2024.
520 $a Continuous and increasing generation of solid waste and its effective disposal have become critical challenges, particularly in recent years. The incorporation of waste materials into cementitious mixtures offers a promising solution to divert materials from landfills. However, understanding the impact of waste materials on the properties of cementitious mixtures is essential for their large-scale adoption. This research aims to enhance our understanding of the utilization of three waste materials: polypropylene (PP), polyethylene terephthalate (PET), and ceramic electrical insulators and bushings in cementitious mixtures.The hydrophobic nature of plastics, which causes low adhesion to cement matrix, poses a primary concern for their use in cementitious mixtures. Surface treatment of plastics is an effective method to improve their hydrophilicity. This research investigates ultraviolet (UV) irradiation and bio-grafting for surface treatment. Bio-grafting is a scalable, safe, and considerably faster surface treatment method which utilizes cooking oil and microwave radiation. The benefits of increasing the hydrophilicity of plastics through UV irradiation and bio-grafting on the ductility improvement of plastic-cement composites are established through spectroscopic observation of the plastic surfaces and three-point bend tests on plastic-cement composites. UV irradiation and bio-grafting successfully improved the oxygen functional groups at the plastic's surface, increasing its hydrophilicity. The enhanced hydrophilicity improves plastic-cement adhesion, facilitating stress transfer at the interface, resulting in a significant enhancement in the energy absorption capacity and ductility of the composite. A size effect investigation reveals an{A0}increase in transition size, fracture energy, and effective fracture process zone length, along with a decrease in the brittleness number of cementitious composites with PET modified through bio-grafting, indicating a transition from essentially purely brittle to quasi-brittle behavior.Furthermore, the assessment of the fresh, hardened, and durability properties of concrete with ceramic aggregate against reference concrete with conventional limestone aggregates demonstrates that ceramics are an effective alternative. Ceramic aggregates have no significant impact on mechanical properties but result in improved workability and durability properties in terms of chloride resistance and capillary water absorption. Overall, the research output will contribute to the valorization of some commonly landfilled materials as ingredients in cementitious mixtures, promoting waste diversion from landfills.
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650 4 $a Materials science. $3 543314
650 4 $a Plastics. $3 649803
650 4 $a Analytical chemistry. $3 3168300
653 $a Cement
653 $a Composites
653 $a Surface treatment
653 $a Sustainable construction
653 $a Waste plastics
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690 $a 0486
690 $a 0794
690 $a 0795
690 $a 0495
710 2 $a Arizona State University. $b Civil, Environmental and Sustainable Engineering. $3 3289089
773 0 $t Dissertations Abstracts International $g 86-01B.
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792 $a 2024
793 $a English
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