Effects of metakaolin on nanomechanical properties of cement paste
MetadataShow full item record
Metakaolin (MK) is a pozzolanic material, which is a dehydroxylated form of the clay mineral kaolinite. It is obtained by calcination of kaolinite clay at a temperature between 500 °C and 800 °C. In cement matrix, MK reacts with Ca (OH)2, to produce calcium silicate hydrate (CSH) gel. MK also contains alumina that reacts with Ca(OH)2 to produce additional alumina-containing phases, including C4AH13, C2ASH8 and C3AH6. This research aims to provide a better understanding of the effects of MK on the nanomechanical properties of the main phases present within the cement paste. Two different mixes were prepared, one control mix and the other one with 10 % MK (by cement weight). A constant water binder ratio of 0.4 was used for both the mixes. Fraction volumes determined from nanoindentation testing show an increase in the amounts of high-density CSH at the cost of low-density CSH gel in cement pastes containing 10 % MK.
Showing items related by title, author, creator and subject.
Nusit, K.; Jitsangiam, Peerapong; Nikraz, Hamid; Hewa Thalagahage, R. (2014)Cement-treated base is a conveniently and effectively stabilised pavement material consisting of a mixture of standard base course materials blended with a prescribed amount of Portland cement and water. The cement-treated ...
Nusit, K.; Jitsangiam, Peerapong; Kodikara, J.; Bui, H.; Leung, G.L.M. (2015)One of the most common methods used in road-pavement construction is the stabilizing of the conventional pavement base course layer. This is achieved by adding cement or lime to gain better material performance. However, ...
Jitsangiam, Peerapong; Chummuneerat, Suphat; Hewa Thalagahage, R.; Tongaroonsri, S.; Hamavibool, S. (2014)Shrinkage cracking is a significant problem when using cement stabilised materials in the construction of road pavements. Reflective (upward) cracks travel from the cement stabilised base layer to the top of the asphalt ...