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- W1527726579 abstract "Calcium sulfoaluminate cement (CSA) is a potential low-carbon binder thathas a markedly less alkaline matrix environment compared to traditionalPortland cement. Investigations on its long-term chemical compatibility withdifferent reinforcements (i.e. glass fibre and steel rebar) are necessarybefore widespread adoption could occur. In this project, studies mainly focuson the microstructural evolution at interfacial zones over time, which has asignificant impact on the durability properties of reinforced concretes.Glass fibre reinforced composites made with two matrix formulations (OPC,and OPC plus calcium sulfoaluminate based matrices) aged for 10 years at25℃ and steel reinforced CSA concretes aged for 28 days and 1.5 years arestudied. Optical transmitted microscopy and SEM/EDX on the thin sectionpetrographic specimens of composites are employed to give astraightforward interfacial zone characterization.The results suggest that CSA cement is highly compatible with theembedded glass fibre and steel reinforcement in the long term. Aged GRCcomposite modified by calcium sulfoaluminate cement shows greatlyretained toughness, accompanied by considerably flexible interfacial andinterfilamentary areas around the glass fibres. This is in contrary to the agedOPC/GRC, which demonstrates significantly brittle behaviour withsubstantial densification of C-S-H/CH intermixture occurring around glassfibres. In the steel reinforced CSA concrete, elemental mappings clearlyshow that there is a non-continuous aluminium-rich layer at thesteel/concrete interface; and the aluminium gel is slightly consumed overtime by chemical reactions." @default.
- W1527726579 created "2016-06-24" @default.
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- W1527726579 date "2015-06-30" @default.
- W1527726579 modified "2023-09-26" @default.
- W1527726579 title "Reinforcement interfaces in low-carbon concretes" @default.
- W1527726579 hasPublicationYear "2015" @default.
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