{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/120409"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/120409","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Quantitative assessment of self-healing in cementitious systems","abstract":"Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-05-01","abstract_html":"Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-05-01","abstract_has_math":false,"creators":["Doehring, Jacob William"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Civil Engineering","degree_department":null,"school":null,"contributors":["Garg, Nishant"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2023,"date_issued":"2023-05","date_published":"2023-05","updated_at":"2026-07-22T22:24:57Z","subjects":["Cement","Self-healing","Quantitative","Cementitious","Calcium Nitrite"],"languages":["en","eng"],"rights":["Copyright 2023 Jacob W Doehring"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/2142/120409","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Garg, Nishant"]},{"key":"dc:creator","label":"Author","values":["Doehring, Jacob William"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2023-05","2023-05-01"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Civil Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Cement","Self-healing","Quantitative","Cementitious","Calcium Nitrite"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en","eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2023 Jacob W Doehring"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://hdl.handle.net/2142/120409"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-05-01","The student, Jacob Doehring, accepted the attached license on 2023-04-24 at 17:13.","The student, Jacob Doehring, submitted this Thesis for approval on 2023-04-24 at 17:15.","This Thesis was approved for publication on 2023-05-01 at 08:56.","DSpace SAF Submission Ingestion Package generated from Vireo submission #19126 on 2023-09-01 at 17:14:39","The discussions around self-healing cements have grown over the past decade as researchers in construction materials aim to find a more sustainable approach to cement and supplementary cementitious materials (SCM). Current efforts in self-healing cements have used a variety of designs ranging from micro-encapsulated healing agents, embedded in concrete or cement during the mixing process, to enzymes or bacteria which consume a calcium-sourced nutrient solution to precipitate mineral growth, healing cracked or void spaces. Within many of these concepts, ideal or altered conditions are often needed to adjust for the high pH levels of the concrete or the harsh mixing process. As such, altering the concrete mix design to adjust for self-healing potential may result in further deterioration issues such as altered cement reactions, increased void space, or strength loss. Subsequently, with this rise in processes for self-healing cements and other SCMs, there lacks in the literature a simplified, novel method for quantifying self-healing in construction materials. Many such methods currently used to quantify healing result in topological crack healing which fails to capture crack depth. Other methods use weight-change and compressive testing to correlate to a quantified value. Many such methods fail to grasp the breadth of capability in collecting meaningful data and consistently reproducing quantified results. In the following report, we first present a novel approach for self-healing cements in the form of an aqueous calcium nitrite solution that, within less than 24 hours, can produce significant crystal growth, filling cracked space with upwards of 60% efficiency. These crystals additionally act as nucleation sites for continual carbonation to form on the surface of precipitated calcium nitrite crystals, strengthening and healing the cracked cement spaces. Secondly, we propose a new method for quantifying self-healing cements through a Laser Scanning Confocal Microscope (LSCM), used to track the mineral precipitation occurring in the cracked space. The results from the LSCM proved consistent in multiple samples and the resulting mineral precipitate would correlate directly with the concentration of calcium nitrite solution and quantified growth."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Quantitative assessment of self-healing in cementitious systems"]}]}],"canonical_facts":{"dc:contributor":["Garg, Nishant"],"dc:creator":["Doehring, Jacob William"],"dc:date":["2023-05","2023-05-01"],"dc:description":["Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-05-01","The student, Jacob Doehring, accepted the attached license on 2023-04-24 at 17:13.","The student, Jacob Doehring, submitted this Thesis for approval on 2023-04-24 at 17:15.","This Thesis was approved for publication on 2023-05-01 at 08:56.","DSpace SAF Submission Ingestion Package generated from Vireo submission #19126 on 2023-09-01 at 17:14:39","The discussions around self-healing cements have grown over the past decade as researchers in construction materials aim to find a more sustainable approach to cement and supplementary cementitious materials (SCM). Current efforts in self-healing cements have used a variety of designs ranging from micro-encapsulated healing agents, embedded in concrete or cement during the mixing process, to enzymes or bacteria which consume a calcium-sourced nutrient solution to precipitate mineral growth, healing cracked or void spaces. Within many of these concepts, ideal or altered conditions are often needed to adjust for the high pH levels of the concrete or the harsh mixing process. As such, altering the concrete mix design to adjust for self-healing potential may result in further deterioration issues such as altered cement reactions, increased void space, or strength loss. Subsequently, with this rise in processes for self-healing cements and other SCMs, there lacks in the literature a simplified, novel method for quantifying self-healing in construction materials. Many such methods currently used to quantify healing result in topological crack healing which fails to capture crack depth. Other methods use weight-change and compressive testing to correlate to a quantified value. Many such methods fail to grasp the breadth of capability in collecting meaningful data and consistently reproducing quantified results. In the following report, we first present a novel approach for self-healing cements in the form of an aqueous calcium nitrite solution that, within less than 24 hours, can produce significant crystal growth, filling cracked space with upwards of 60% efficiency. These crystals additionally act as nucleation sites for continual carbonation to form on the surface of precipitated calcium nitrite crystals, strengthening and healing the cracked cement spaces. Secondly, we propose a new method for quantifying self-healing cements through a Laser Scanning Confocal Microscope (LSCM), used to track the mineral precipitation occurring in the cracked space. The results from the LSCM proved consistent in multiple samples and the resulting mineral precipitate would correlate directly with the concentration of calcium nitrite solution and quantified growth."],"dc:format":["application/pdf"],"dc:identifier":["https://hdl.handle.net/2142/120409"],"dc:language":["en","eng"],"dc:rights":["Copyright 2023 Jacob W Doehring"],"dc:subject":["Cement","Self-healing","Quantitative","Cementitious","Calcium Nitrite"],"dc:title":["Quantitative assessment of self-healing in cementitious systems"],"dc:type":["text"],"thesis:degree_discipline":["Civil Engineering"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:24:57Z"}