Nowadays kaolin raw material is usually used to produce nano-kaolin for geopolymer
enhancement by using firing method. In the present study, kaolin used was taken from the Naqus
Formation (Cambro-Ordovician age), west of Gabal El Gunna, Sinai, Egypt. Nano-kaolin material is
an ultrafine material and was prepared from the taken kaolin by the firing process at 800 for 2 ℃ h
with a heating rate of 5 /min. Six mixes were prepared and their laboratory specimens were made ℃
and cured up to 90 days. Water cooled slag was used as starting material, and sodium hydroxide and
sodium silicate were used in the study as activators for the used kaolin. The formed geopolymer mixes
with different ratios (1%, 1.5%, 3%, 5%, and 7%) of nano-kaolin as a partial replacement for the raw
kaolin were investigated. Gelenium Ace super plasticizer was added in the ratio of 4% from the dry
weight to ensure good dispersing of the used nano clay. Results showed that increasing the percentage
of nano-kaolin up to 3% results in an enhancement in the mechanical properties as compared with the
control mix up to 90 days of curing, while higher ratios are not preferable where they lead to
agglomeration of the added nano materials and matrix dilution.