A novel capsule by poly (ethylene glycol) granulation for self-healing concrete
Minerals can be incorporated in concrete to promote self-healing. Encapsulation of minerals is needed for avoiding undesired reactions before concrete cracks. Therefore, this study designed a novel capsule. The core materials of the capsules were either cement or a combination of cement and superabs...
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| Veröffentlicht in: | Cement and concrete research 2020-07, Vol.133, p.106053, Article 106053 |
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| creator | Feng, Jianhang Dong, Hua Wang, Ruixing Su, Yilin |
| description | Minerals can be incorporated in concrete to promote self-healing. Encapsulation of minerals is needed for avoiding undesired reactions before concrete cracks. Therefore, this study designed a novel capsule. The core materials of the capsules were either cement or a combination of cement and superabsorbent polymers (SAPs), which were granulated by poly (ethylene glycol) followed by a waterproof layer (i.e., epoxy resin and sand). The structure and hydration process of capsules, self-healing efficiency of cracked mortars and healing product were characterized. Results showed that core materials in capsules could react with water with dissolution of PEG and swelling of SAP swelled in cracks. Moreover, specimens incorporated capsules showed high sealing ratio for cracks below 400 μm and even inside cracks wider than 200 μm could be bridged due to capsules with SAP. Recovery of water tightness, flexural and compressive strength were obtained. The healing products were C-S-H and CaCO3. |
| doi_str_mv | 10.1016/j.cemconres.2020.106053 |
| format | Article |
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Encapsulation of minerals is needed for avoiding undesired reactions before concrete cracks. Therefore, this study designed a novel capsule. The core materials of the capsules were either cement or a combination of cement and superabsorbent polymers (SAPs), which were granulated by poly (ethylene glycol) followed by a waterproof layer (i.e., epoxy resin and sand). The structure and hydration process of capsules, self-healing efficiency of cracked mortars and healing product were characterized. Results showed that core materials in capsules could react with water with dissolution of PEG and swelling of SAP swelled in cracks. Moreover, specimens incorporated capsules showed high sealing ratio for cracks below 400 μm and even inside cracks wider than 200 μm could be bridged due to capsules with SAP. Recovery of water tightness, flexural and compressive strength were obtained. The healing products were C-S-H and CaCO3.</description><identifier>ISSN: 0008-8846</identifier><identifier>EISSN: 1873-3948</identifier><identifier>DOI: 10.1016/j.cemconres.2020.106053</identifier><language>eng</language><publisher>Elmsford: Elsevier Ltd</publisher><subject>Calcium carbonate ; Cement ; Compressive strength ; Concrete ; Cracks ; Encapsulation ; Epoxy resins ; Ethylene glycol ; Granulation ; Minerals ; Mortars (material) ; Poly (ethylene glycol) ; Self healing materials ; Self-healing ; Superabsorbent polymers ; Watertightness</subject><ispartof>Cement and concrete research, 2020-07, Vol.133, p.106053, Article 106053</ispartof><rights>2020</rights><rights>Copyright Elsevier BV Jul 2020</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c343t-efa3556189cb89cc102de2b3f67b6f37b5c04776fd0bc27630239f5c9cff81913</citedby><cites>FETCH-LOGICAL-c343t-efa3556189cb89cc102de2b3f67b6f37b5c04776fd0bc27630239f5c9cff81913</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0008884620300910$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids></links><search><creatorcontrib>Feng, Jianhang</creatorcontrib><creatorcontrib>Dong, Hua</creatorcontrib><creatorcontrib>Wang, Ruixing</creatorcontrib><creatorcontrib>Su, Yilin</creatorcontrib><title>A novel capsule by poly (ethylene glycol) granulation for self-healing concrete</title><title>Cement and concrete research</title><description>Minerals can be incorporated in concrete to promote self-healing. Encapsulation of minerals is needed for avoiding undesired reactions before concrete cracks. Therefore, this study designed a novel capsule. The core materials of the capsules were either cement or a combination of cement and superabsorbent polymers (SAPs), which were granulated by poly (ethylene glycol) followed by a waterproof layer (i.e., epoxy resin and sand). The structure and hydration process of capsules, self-healing efficiency of cracked mortars and healing product were characterized. Results showed that core materials in capsules could react with water with dissolution of PEG and swelling of SAP swelled in cracks. Moreover, specimens incorporated capsules showed high sealing ratio for cracks below 400 μm and even inside cracks wider than 200 μm could be bridged due to capsules with SAP. Recovery of water tightness, flexural and compressive strength were obtained. The healing products were C-S-H and CaCO3.</description><subject>Calcium carbonate</subject><subject>Cement</subject><subject>Compressive strength</subject><subject>Concrete</subject><subject>Cracks</subject><subject>Encapsulation</subject><subject>Epoxy resins</subject><subject>Ethylene glycol</subject><subject>Granulation</subject><subject>Minerals</subject><subject>Mortars (material)</subject><subject>Poly (ethylene glycol)</subject><subject>Self healing materials</subject><subject>Self-healing</subject><subject>Superabsorbent polymers</subject><subject>Watertightness</subject><issn>0008-8846</issn><issn>1873-3948</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNqFUMtqwzAQFKWFpmm_oYJe2oNTybIl-RhCXxDIpT0LW14lNoqUSnbAf18bl157WJZdZmZ3BqF7SlaUUP7crjQctXcB4iol6bTlJGcXaEGlYAkrMnmJFoQQmUiZ8Wt0E2M7jjxlcoF2a-z8GSzW5Sn2FnA14JO3A36E7jBYcID3dtDePuF9KF1vy67xDhsfcARrkgOUtnF7PD6gA3Rwi65MaSPc_fYl-np9-dy8J9vd28dmvU00y1iXgClZnnMqC12NpSlJa0grZriouGGiyjXJhOCmJpVOBWckZYXJdaGNkbSgbIkeZt1T8N89xE61vg9uPKnSjInJOptQYkbp4GMMYNQpNMcyDIoSNaWnWvWXnprSU3N6I3M9M2E0cW4gqKgbcBrqJoDuVO2bfzV-AEWGfIM</recordid><startdate>202007</startdate><enddate>202007</enddate><creator>Feng, Jianhang</creator><creator>Dong, Hua</creator><creator>Wang, Ruixing</creator><creator>Su, Yilin</creator><general>Elsevier Ltd</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7QQ</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>FR3</scope><scope>JG9</scope><scope>KR7</scope></search><sort><creationdate>202007</creationdate><title>A novel capsule by poly (ethylene glycol) granulation for self-healing concrete</title><author>Feng, Jianhang ; Dong, Hua ; Wang, Ruixing ; Su, Yilin</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c343t-efa3556189cb89cc102de2b3f67b6f37b5c04776fd0bc27630239f5c9cff81913</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Calcium carbonate</topic><topic>Cement</topic><topic>Compressive strength</topic><topic>Concrete</topic><topic>Cracks</topic><topic>Encapsulation</topic><topic>Epoxy resins</topic><topic>Ethylene glycol</topic><topic>Granulation</topic><topic>Minerals</topic><topic>Mortars (material)</topic><topic>Poly (ethylene glycol)</topic><topic>Self healing materials</topic><topic>Self-healing</topic><topic>Superabsorbent polymers</topic><topic>Watertightness</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Feng, Jianhang</creatorcontrib><creatorcontrib>Dong, Hua</creatorcontrib><creatorcontrib>Wang, Ruixing</creatorcontrib><creatorcontrib>Su, Yilin</creatorcontrib><collection>CrossRef</collection><collection>Ceramic Abstracts</collection><collection>Engineered Materials 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>Cement and concrete research</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Feng, Jianhang</au><au>Dong, Hua</au><au>Wang, Ruixing</au><au>Su, Yilin</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A novel capsule by poly (ethylene glycol) granulation for self-healing concrete</atitle><jtitle>Cement and concrete research</jtitle><date>2020-07</date><risdate>2020</risdate><volume>133</volume><spage>106053</spage><pages>106053-</pages><artnum>106053</artnum><issn>0008-8846</issn><eissn>1873-3948</eissn><abstract>Minerals can be incorporated in concrete to promote self-healing. Encapsulation of minerals is needed for avoiding undesired reactions before concrete cracks. Therefore, this study designed a novel capsule. The core materials of the capsules were either cement or a combination of cement and superabsorbent polymers (SAPs), which were granulated by poly (ethylene glycol) followed by a waterproof layer (i.e., epoxy resin and sand). The structure and hydration process of capsules, self-healing efficiency of cracked mortars and healing product were characterized. Results showed that core materials in capsules could react with water with dissolution of PEG and swelling of SAP swelled in cracks. Moreover, specimens incorporated capsules showed high sealing ratio for cracks below 400 μm and even inside cracks wider than 200 μm could be bridged due to capsules with SAP. Recovery of water tightness, flexural and compressive strength were obtained. 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| ispartof | Cement and concrete research, 2020-07, Vol.133, p.106053, Article 106053 |
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| source | Elsevier ScienceDirect Journals |
| subjects | Calcium carbonate Cement Compressive strength Concrete Cracks Encapsulation Epoxy resins Ethylene glycol Granulation Minerals Mortars (material) Poly (ethylene glycol) Self healing materials Self-healing Superabsorbent polymers Watertightness |
| title | A novel capsule by poly (ethylene glycol) granulation for self-healing concrete |
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