Effects of silane surface functionalization on interfacial fracture energy and durability of adhesive bond between cement paste and epoxy
Epoxy adhesives are experiencing widespread use in concrete structures. However, a common concern regarding the adhesive joints in the infrastructure is their durability when exposed to harsh environments, most particularly, high levels of moisture. This work recognizes that adhesive bond between ep...
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| Veröffentlicht in: | International journal of adhesion and adhesives 2018-08, Vol.84, p.132-142 |
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| container_title | International journal of adhesion and adhesives |
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| creator | Tatar, Jovan Torrence, Christa E. Mecholsky, John J. Taylor, Curtis R. Hamilton, H.R. |
| description | Epoxy adhesives are experiencing widespread use in concrete structures. However, a common concern regarding the adhesive joints in the infrastructure is their durability when exposed to harsh environments, most particularly, high levels of moisture. This work recognizes that adhesive bond between epoxy and substrate resists applied loads by a combination of chemical (hydrogen) bonds and mechanical interlock. Given the complexity of the stress-transfer mechanism this work focused exclusively on the chemical bond component between epoxy and cement paste, while the mechanical interlock was minimized through polishing of the cement paste substrate. A beam adhesion test method with notched interface was developed to assess the durability of chemical bonds between the adherents when aged by water immersion; surface functionalization of cement paste substrate was additionally explored as means of improving the chemical bonding and adhesion along the interface. Test results indicated that interfacial fracture energies were improved in both dry and conditioned groups with silane surface treatment. Analysis of interfacial failure modes with respect to the analytical crack kink criterion revealed that interphase region between epoxy and cement paste is characterized with higher fracture toughness than the cement paste substrate. The study lays groundwork for improvement in the durability of adhesive joints in related infrastructure through bottom-up interface design. |
| doi_str_mv | 10.1016/j.ijadhadh.2018.02.009 |
| format | Article |
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However, a common concern regarding the adhesive joints in the infrastructure is their durability when exposed to harsh environments, most particularly, high levels of moisture. This work recognizes that adhesive bond between epoxy and substrate resists applied loads by a combination of chemical (hydrogen) bonds and mechanical interlock. Given the complexity of the stress-transfer mechanism this work focused exclusively on the chemical bond component between epoxy and cement paste, while the mechanical interlock was minimized through polishing of the cement paste substrate. A beam adhesion test method with notched interface was developed to assess the durability of chemical bonds between the adherents when aged by water immersion; surface functionalization of cement paste substrate was additionally explored as means of improving the chemical bonding and adhesion along the interface. Test results indicated that interfacial fracture energies were improved in both dry and conditioned groups with silane surface treatment. Analysis of interfacial failure modes with respect to the analytical crack kink criterion revealed that interphase region between epoxy and cement paste is characterized with higher fracture toughness than the cement paste substrate. 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However, a common concern regarding the adhesive joints in the infrastructure is their durability when exposed to harsh environments, most particularly, high levels of moisture. This work recognizes that adhesive bond between epoxy and substrate resists applied loads by a combination of chemical (hydrogen) bonds and mechanical interlock. Given the complexity of the stress-transfer mechanism this work focused exclusively on the chemical bond component between epoxy and cement paste, while the mechanical interlock was minimized through polishing of the cement paste substrate. A beam adhesion test method with notched interface was developed to assess the durability of chemical bonds between the adherents when aged by water immersion; surface functionalization of cement paste substrate was additionally explored as means of improving the chemical bonding and adhesion along the interface. Test results indicated that interfacial fracture energies were improved in both dry and conditioned groups with silane surface treatment. Analysis of interfacial failure modes with respect to the analytical crack kink criterion revealed that interphase region between epoxy and cement paste is characterized with higher fracture toughness than the cement paste substrate. The study lays groundwork for improvement in the durability of adhesive joints in related infrastructure through bottom-up interface design.</description><subject>Adhesion</subject><subject>Adhesion tests</subject><subject>Adhesive bonding</subject><subject>Adhesive joints</subject><subject>Cements</subject><subject>Chemical bonds</subject><subject>Concrete</subject><subject>Concrete structures</subject><subject>Conditioning</subject><subject>Durability</subject><subject>Epoxy</subject><subject>Failure analysis</subject><subject>Failure modes</subject><subject>Fracture toughness</subject><subject>Fractures</subject><subject>Hydrogen bonds</subject><subject>Hygrothermal</subject><subject>Infrastructure</subject><subject>Organic chemistry</subject><subject>Silane</subject><subject>Submerging</subject><subject>Substrates</subject><subject>Surface treatment</subject><subject>Water immersion</subject><issn>0143-7496</issn><issn>1879-0127</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNqFkNtKBDEMhosouB5eQQpez5jOqZ07RTzBgjd6XbqdVDuMnbXtqOsb-NZ2XL0WAklI_p_kI-SEQc6ANWd9bnvVPafIC2AihyIHaHfIggneZsAKvksWwKoy41Xb7JODEHoAxqEqF-TryhjUMdDR0GAH5ZCGyRulkZrJ6WhHpwb7qeaCprAu4jy2aqDGKx0njxQd-qcNVa6j3eTVyg42bmbHdBMG-4Z0NabZCuM7oqMaX9BFulYh4o8I1-PH5ojsGTUEPP7Nh-Tx-urh8jZb3t_cXV4sM11WEDMhyhqRQy1MbbQqhW604ByF4E2LqW8EqBIZANTIOSugwgaBCwWiSrk8JKdb37UfXycMUfbj5NOXQRaQXNq65SxtNdst7ccQPBq59vZF-Y1kIGfsspd_2OWMXUIhE_YkPN8KMf3wZtHLoC06jZ31CbTsRvufxTf3ZZDK</recordid><startdate>201808</startdate><enddate>201808</enddate><creator>Tatar, Jovan</creator><creator>Torrence, Christa E.</creator><creator>Mecholsky, John J.</creator><creator>Taylor, Curtis R.</creator><creator>Hamilton, H.R.</creator><general>Elsevier Ltd</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7TB</scope><scope>8BQ</scope><scope>8FD</scope><scope>FR3</scope><scope>JG9</scope><scope>KR7</scope></search><sort><creationdate>201808</creationdate><title>Effects of silane surface functionalization on interfacial fracture energy and durability of adhesive bond between cement paste and epoxy</title><author>Tatar, Jovan ; Torrence, Christa E. ; Mecholsky, John J. ; Taylor, Curtis R. ; Hamilton, H.R.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c340t-8835ee7058f5fca38c6c877e88769ea38680a3e10005e771204e6e078a084e073</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Adhesion</topic><topic>Adhesion tests</topic><topic>Adhesive bonding</topic><topic>Adhesive joints</topic><topic>Cements</topic><topic>Chemical bonds</topic><topic>Concrete</topic><topic>Concrete structures</topic><topic>Conditioning</topic><topic>Durability</topic><topic>Epoxy</topic><topic>Failure analysis</topic><topic>Failure modes</topic><topic>Fracture toughness</topic><topic>Fractures</topic><topic>Hydrogen bonds</topic><topic>Hygrothermal</topic><topic>Infrastructure</topic><topic>Organic chemistry</topic><topic>Silane</topic><topic>Submerging</topic><topic>Substrates</topic><topic>Surface treatment</topic><topic>Water immersion</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Tatar, Jovan</creatorcontrib><creatorcontrib>Torrence, Christa E.</creatorcontrib><creatorcontrib>Mecholsky, John J.</creatorcontrib><creatorcontrib>Taylor, Curtis R.</creatorcontrib><creatorcontrib>Hamilton, H.R.</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><collection>Civil Engineering Abstracts</collection><jtitle>International journal of adhesion and adhesives</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Tatar, Jovan</au><au>Torrence, Christa E.</au><au>Mecholsky, John J.</au><au>Taylor, Curtis R.</au><au>Hamilton, H.R.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effects of silane surface functionalization on interfacial fracture energy and durability of adhesive bond between cement paste and epoxy</atitle><jtitle>International journal of adhesion and adhesives</jtitle><date>2018-08</date><risdate>2018</risdate><volume>84</volume><spage>132</spage><epage>142</epage><pages>132-142</pages><issn>0143-7496</issn><eissn>1879-0127</eissn><abstract>Epoxy adhesives are experiencing widespread use in concrete structures. However, a common concern regarding the adhesive joints in the infrastructure is their durability when exposed to harsh environments, most particularly, high levels of moisture. This work recognizes that adhesive bond between epoxy and substrate resists applied loads by a combination of chemical (hydrogen) bonds and mechanical interlock. Given the complexity of the stress-transfer mechanism this work focused exclusively on the chemical bond component between epoxy and cement paste, while the mechanical interlock was minimized through polishing of the cement paste substrate. A beam adhesion test method with notched interface was developed to assess the durability of chemical bonds between the adherents when aged by water immersion; surface functionalization of cement paste substrate was additionally explored as means of improving the chemical bonding and adhesion along the interface. Test results indicated that interfacial fracture energies were improved in both dry and conditioned groups with silane surface treatment. Analysis of interfacial failure modes with respect to the analytical crack kink criterion revealed that interphase region between epoxy and cement paste is characterized with higher fracture toughness than the cement paste substrate. The study lays groundwork for improvement in the durability of adhesive joints in related infrastructure through bottom-up interface design.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.ijadhadh.2018.02.009</doi><tpages>11</tpages></addata></record> |
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| ispartof | International journal of adhesion and adhesives, 2018-08, Vol.84, p.132-142 |
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| subjects | Adhesion Adhesion tests Adhesive bonding Adhesive joints Cements Chemical bonds Concrete Concrete structures Conditioning Durability Epoxy Failure analysis Failure modes Fracture toughness Fractures Hydrogen bonds Hygrothermal Infrastructure Organic chemistry Silane Submerging Substrates Surface treatment Water immersion |
| title | Effects of silane surface functionalization on interfacial fracture energy and durability of adhesive bond between cement paste and epoxy |
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