Lightweight geopolymer and method for preparing

摘要

Disclosed is a method for producing a lightweight inorganic polymer material that includes the following steps in order: A. prepare activator solution; B. add activator solution to a metakaolin and mix; C. add a finely divided form of aluminium and a calcium additive then mix; where the activator solution is made by combining a group 1 metal soluble silicate solution with a group 1 metal hydroxide until the hydroxide concentration is between 3.5 and 10.5 molar, such that the mixing of the activator solution and metakaolin forms an Inorganic Polymer Matrix (IPM) paste, such that the calcium additive is at least food grade with a low magnesium (less than about 2%) content.