Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Workability and Crack Recovery Performance Investigation of IPDI Microcapsules–Based Self-Healing Cement Paste
Isophorone diisocyanate (IPDI) was encapsulated successfully within double-layered shells, and final microcapsules showed outstanding self-healing functions in cement paste. The well-dispersed microcapsules had a diameter of , shell thickness of , and core fraction around by weight. The diameters of microcapsules were adjustable by varying agitation rates. The beginning weight-loss temperature of microcapsules was 200°C, implying good thermal stability. The final microcapsules affected slightly the workability and setting time of fresh self-healing cement paste. Although the mechanical strength of hardened self-healing cement paste was decreased with the increase of microcapsule concentrations, the open porosity was improved obviously from 33.5% (control samples) to 31.8% when 5.0% by weight of microcapsules was introduced. The interfaces of microcapsules were compatible enough with cement paste without obvious delamination. Especially, the self-healing cement paste showed outstanding self-healing functions in open air when 10.0% by weight of microcapsules was introduced.
Workability and Crack Recovery Performance Investigation of IPDI Microcapsules–Based Self-Healing Cement Paste
Isophorone diisocyanate (IPDI) was encapsulated successfully within double-layered shells, and final microcapsules showed outstanding self-healing functions in cement paste. The well-dispersed microcapsules had a diameter of , shell thickness of , and core fraction around by weight. The diameters of microcapsules were adjustable by varying agitation rates. The beginning weight-loss temperature of microcapsules was 200°C, implying good thermal stability. The final microcapsules affected slightly the workability and setting time of fresh self-healing cement paste. Although the mechanical strength of hardened self-healing cement paste was decreased with the increase of microcapsule concentrations, the open porosity was improved obviously from 33.5% (control samples) to 31.8% when 5.0% by weight of microcapsules was introduced. The interfaces of microcapsules were compatible enough with cement paste without obvious delamination. Especially, the self-healing cement paste showed outstanding self-healing functions in open air when 10.0% by weight of microcapsules was introduced.
Workability and Crack Recovery Performance Investigation of IPDI Microcapsules–Based Self-Healing Cement Paste
Dawei, Sun (Autor:in) / Wenxu, Ma (Autor:in) / Jikun, Ma (Autor:in) / Qianjin, Mao (Autor:in) / Mingzhang, Lan (Autor:in) / Ziming, Wang (Autor:in) / Shibing, Sun (Autor:in) / Yingliang, Tian (Autor:in) / Hongxia, Guo (Autor:in) / Suping, Cui (Autor:in)
27.04.2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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