{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/97271"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/97271","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Biologically reinforced geopolymer composites","abstract":"A series of studies detailing the characteristics of biologically reinforced geopolymers is presented. Cork particle reinforced sodium geopolymer composites were shown to have a maximum flexural strength of 2.5 MPa, and an average strain-to-failure of 0.75%. Abaca fiber reinforced sodium geopolymer composites had flexural strengths exceeding 25 MPa. The main focus of this study was abaca fiber reinforced potassium geopolymer composites, which had flexural strengths exceeding 50 MPa at 8 wt% abaca fibers. This new composite was shown to have good water and saltwater durability, decent sodium hydroxide and freeze cycle durability, and poor sulfuric acid durability. The composite was also tested for heat sensitivity, and showed a steady decrease in flexural strength as it was exposed to higher temperatures. The composite was unable to carry any load after being treated to 300°C. Weibull statistical analysis was used to better understand the range of flexural strengths within different sample groups. Finally, SEM analysis was employed to characterize fracture surfaces and mode of failure in the different sample sets.","abstract_html":"A series of studies detailing the characteristics of biologically reinforced geopolymers is presented. Cork particle reinforced sodium geopolymer composites were shown to have a maximum flexural strength of 2.5 MPa, and an average strain-to-failure of 0.75%. Abaca fiber reinforced sodium geopolymer composites had flexural strengths exceeding 25 MPa. The main focus of this study was abaca fiber reinforced potassium geopolymer composites, which had flexural strengths exceeding 50 MPa at 8 wt% abaca fibers. This new composite was shown to have good water and saltwater durability, decent sodium hydroxide and freeze cycle durability, and poor sulfuric acid durability. The composite was also tested for heat sensitivity, and showed a steady decrease in flexural strength as it was exposed to higher temperatures. The composite was unable to carry any load after being treated to 300°C. Weibull statistical analysis was used to better understand the range of flexural strengths within different sample groups. Finally, SEM analysis was employed to characterize fracture surfaces and mode of failure in the different sample sets.","abstract_has_math":false,"creators":["Roper, Daniel Steven"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Materials Science & Engr","degree_department":null,"school":null,"contributors":["Kriven, Waltraud M."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2017,"date_issued":"2017-08-10T19:14:32Z","date_published":"2017-08-10T19:14:32Z","updated_at":"2026-07-22T22:24:32Z","subjects":["Geopolymer","Composite","Biological","Cork","Abaca"],"languages":["en"],"rights":["Copyright 2017 Daniel S. 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The composite was also tested for heat sensitivity, and showed a steady decrease in flexural strength as it was exposed to higher temperatures. The composite was unable to carry any load after being treated to 300°C. Weibull statistical analysis was used to better understand the range of flexural strengths within different sample groups. Finally, SEM analysis was employed to characterize fracture surfaces and mode of failure in the different sample sets.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2017-08-10 without embargo terms","The student, Daniel Roper, accepted the attached license on 2017-03-10 at 16:45.","The student, Daniel Roper, submitted this Thesis for approval on 2017-03-10 at 16:49.","This Thesis was approved for publication on 2017-03-13 at 15:04.","DSpace SAF Submission Ingestion Package generated from Vireo submission #10586 on 2017-08-10 at 13:38:04","Made available in DSpace on 2017-08-10T19:14:32Z (GMT). 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The main focus of this study was abaca fiber reinforced potassium geopolymer composites, which had flexural strengths exceeding 50 MPa at 8 wt% abaca fibers. This new composite was shown to have good water and saltwater durability, decent sodium hydroxide and freeze cycle durability, and poor sulfuric acid durability. The composite was also tested for heat sensitivity, and showed a steady decrease in flexural strength as it was exposed to higher temperatures. The composite was unable to carry any load after being treated to 300°C. Weibull statistical analysis was used to better understand the range of flexural strengths within different sample groups. Finally, SEM analysis was employed to characterize fracture surfaces and mode of failure in the different sample sets.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2017-08-10 without embargo terms","The student, Daniel Roper, accepted the attached license on 2017-03-10 at 16:45.","The student, Daniel Roper, submitted this Thesis for approval on 2017-03-10 at 16:49.","This Thesis was approved for publication on 2017-03-13 at 15:04.","DSpace SAF Submission Ingestion Package generated from Vireo submission #10586 on 2017-08-10 at 13:38:04","Made available in DSpace on 2017-08-10T19:14:32Z (GMT). No. of bitstreams: 2 ROPER-THESIS-2017.pdf: 8962188 bytes, checksum: e692e4a8ccce7001ad5e1be190281f01 (MD5) LICENSE.txt: 4209 bytes, checksum: 43ba50f58386487dc3f46ede1f311ff0 (MD5) Previous issue date: 2017-03-13"],"dc:format":["application/pdf"],"dc:identifier":["http://hdl.handle.net/2142/97271"],"dc:language":["en"],"dc:rights":["Copyright 2017 Daniel S. Roper"],"dc:subject":["Geopolymer","Composite","Biological","Cork","Abaca"],"dc:title":["Biologically reinforced geopolymer composites"],"dc:type":["text"],"thesis:degree_discipline":["Materials Science & Engr"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:24:32Z"}