7Arellano-Aguilar R, Burciaga-Diaz O, Gorokhovsky A, et al. Geopolymer mortars based on a low grade metakaolin: Effects of the chemical composition, temperature and aggregate: Binder ratio[J]. Construction and Building Materials, 2014, 50: 642-648.
8Shon C S, Jtmg Y S, Saylak D. Evaluation of synthetic aggregates using off-ASTM specification ashes as road base course materials[J]. Construction and Building Materials, 2013, 38: 508-514.
9Knight J A. Gradation of aggregate as applied to stabilization ofgravel roads[J]. Canadian Engineer, 1935, 69(23): 9-13.