Discussion of Y. Zhang et al., 'Study of ion cluster reorientation process of geopolymerisation reaction using semi-empirical AM1 calculations,' Cem Concr Res 39(12): 1174-1179; 2009

摘要

We provide a brief discussion of some issues related to a recent paper published in Cement and Concrete Research. The recent paper of Zhang et al. [1] touches on a number of issues which are worthy of comment, as well as bringing a need for clari-fication in some areas. The desire to understand the process of for-mation of geopolymers at a molecular level is certainly shared by the authors of this discussion, and so it is heartening for us to see that researchers are addressing this important problem by the application of a range of experimental and theoretical techniques. However, as we will discuss in more detail below, we are not convinced that some of the data presented in [1] are sufficiently accurate to justify the con-clusions reached by the authors of that paper.