Microstructure of interface between fibre and matrix in 10-year aged GRC modified by calcium sulfoaluminate cement
作者： Meimei Song , Phil Purnell , Ian Richardson
DOI: 10.1016/J.CEMCONRES.2015.05.011
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摘要: Time-dependent property changes in glass fibre reinforced cement (GRC) mainly result from a combination of the alkalinity matrix and densification (e.g. due to calcium hydroxide precipitation) within around strands. The microstructure interface between fibres GRC has significant impact on its durability. This paper describes study two formulations [with ordinary portland (OPC), OPC plus sulfoaluminate based matrices] aged for 10 years at 25 °C. Thin-section petrography (TSP) scanning electron microscopy (SEM) are used compare both polished surfaces fractured surfaces. OPC/GRC demonstrates significantly brittle behaviour with substantial C–S–H/CH intermixture occurring fibres. In contrary, composite made shows greatly retained toughness, accompanied by considerably flexible interfacial interfilamentary areas
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