A Fundamental Assessment of Graphite Nanoplatelet Effects on Progress of Alkali-Silica Reactions

作者: Amirpasha Peyvandi , Daniel Holmes , Parviz Soroushian , Anagi M. Balachandra

DOI: 10.14359/51687767

关键词: Calcium silicate hydrateCementMaterials scienceCalcium silicateCementitiousSilicateAlkali metalAnhydrousGraphiteComposite material

摘要: Graphite nanoplatelets were used to control alkali-silica reactions in concrete by enhancing the barrier qualities of cementitious binders and providing local reinforcing effects against damaging expansive phenomena. Nuclear magnetic resonance (NMR) spectroscopy was monitor changes chemical environment that reflect upon reactivity. Laboratory experiments conducted evaluate graphite on (ASRs). Reactive flint aggregates induce ASR. The ²⁹Si MAS NMR technique employed for evaluating monitoring different silicate tethrahedra (Qⁿ) as a basis quantify progress ASR materials prepared with without nanoplatelets. Quantitative evaluations Qⁿ species present anhydrous cement, calcium hydrate (C-S-H), products indicated introduction lowered degree polymerization tetrahedral C-S-H. reduction breakdown networked structure tetrahedra under accelerated indicates reduce extent ASRs.

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