It is generally accepted that composites with thinner fillers would show more refined pore structure, so currently the uses of nano materials including nano graphene-based additives (NGAs) to fabricate functional cement composites are quite popular. However, the effects of NGAs on the pore structure of cement composites are far from being fully understood. In this work, we investigated the pore structure of cement composites blended with graphene oxides (GOs) and graphene nanoplatelets (GNPs), which show the similarly layered structure but different sizes and chemico-physical properties. Results reveal that both GOs and GNPs will not significantly alter the hydration products of cement. Both GOs and GNPs can make the material matrix denser by depressing the meso pores; and GOs tend to coarsen the macro pores due to the laminar agglomerations. The findings of this study help better tailor the pore structure of cement composites with NGAs for future materials design and manufacture.

人们普遍认为，具有更薄填料的复合材料将显示出更精细的孔结构，因此，目前，包括纳米石墨烯基添加剂（NGA）在内的纳米材料在制备功能性水泥复合材料中的应用非常普遍。但是，NGA对水泥复合材料孔隙结构的影响远未得到充分理解。在这项工作中，我们研究了掺有氧化石墨烯（GOs）和石墨烯纳米片（GNPs）的水泥复合材料的孔结构，它们显示出相似的层状结构，但大小和化学物理性质不同。结果表明，GO和GNP都不会显着改变水泥的水合产物。GO和GNP都可以通过压低介孔来使材料基质更致密。GOs由于层状团聚而趋于使大孔隙粗化。