Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Self-compensating geopolymer utilizing nano-clay and chopped basalt fibers
Graphical abstract Display Omitted
Highlights Self-compensating geopolymer was developed by using laponite and basalt fibers. The flexible basalt fibers was prepared via one-step drawing with PVA lubircation. The improved roughness and enhanced resistance to alkalis was obtained. Mechanism was found as hydrotalcite-like species formed in the geopolymer.
Abstract To eliminate the drying shrinkage as well as improve toughness of alkali activated geopolymer, the nano-sized laponite and chopped basalt fibers were utilized as additives to prepare self-compensating reinforced geopolymer. The magnesium-silicate laponite featured with gelable properties was found to influence geopolymerization in the slag/fly ash-based alkali system. This was validated by the new formation of hydration products as hydrotalcite-like phase (Ht). The release of Mg2+ under activation promoted the participation of Al from the starting materials (slag and fly ash). Near-zero shrinkage was obtained at the dosage of laponite 4.0–5.0 wt% in the slag/fly ash-based geopolymetric mortars. The composite mortars exhibited excellent tensile-bond strength up to 5.7 MPa, and the low numbers pores of per unit area was achieved compared to other literatures. The flexural strength was improved by 51 % when the geopolymer was incorporated with flexible basalt fibers as modified with polyvinyl alcohol at dosage of 4.0 vol%.
Self-compensating geopolymer utilizing nano-clay and chopped basalt fibers
Graphical abstract Display Omitted
Highlights Self-compensating geopolymer was developed by using laponite and basalt fibers. The flexible basalt fibers was prepared via one-step drawing with PVA lubircation. The improved roughness and enhanced resistance to alkalis was obtained. Mechanism was found as hydrotalcite-like species formed in the geopolymer.
Abstract To eliminate the drying shrinkage as well as improve toughness of alkali activated geopolymer, the nano-sized laponite and chopped basalt fibers were utilized as additives to prepare self-compensating reinforced geopolymer. The magnesium-silicate laponite featured with gelable properties was found to influence geopolymerization in the slag/fly ash-based alkali system. This was validated by the new formation of hydration products as hydrotalcite-like phase (Ht). The release of Mg2+ under activation promoted the participation of Al from the starting materials (slag and fly ash). Near-zero shrinkage was obtained at the dosage of laponite 4.0–5.0 wt% in the slag/fly ash-based geopolymetric mortars. The composite mortars exhibited excellent tensile-bond strength up to 5.7 MPa, and the low numbers pores of per unit area was achieved compared to other literatures. The flexural strength was improved by 51 % when the geopolymer was incorporated with flexible basalt fibers as modified with polyvinyl alcohol at dosage of 4.0 vol%.
Self-compensating geopolymer utilizing nano-clay and chopped basalt fibers
Li, Jingyao (Autor:in) / Si, Jiwen (Autor:in) / Luo, Feng (Autor:in) / Zuo, Chuanxiao (Autor:in) / Zhang, Peiping (Autor:in) / Sun, Yanbin (Autor:in) / Li, Wenqing (Autor:in) / Miao, Shiding (Autor:in)
26.09.2022
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
SL , slag , FA , fly ash , LP , laponite , GM , geopolymer mortar , Ht , hydrotalcite , PVA , polyvinyl alcohol , FBF , “flexible” basalt fibers , PBF , pristine basalt fibers , NBF , none basalt fibers , C-S-H , Calcium-Silicate-Hydrate , Self-compensating , Composite Geopolymer , Shrinkage , Basalt fiber , Laponite , Hydrotalcite-like phase
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