Xiao Yao

TL;DR: In this article, the effects of alkali concentration, modulus of the alkali silicate solution and reaction temperature on geopolymerization were studied systematically by isothermal calorimetry, as well as X-ray diffraction and 27Al/29Si MAS NMR results show that the geopolymersization process of metakaolinite under alkali activation condition can be reasonably supposed into three stages: (I) destruction, (II) polymerization and (III) stabilization.

TL;DR: In this article, a compound geopolymer was developed by adding 10% granulated blast furnace slag (GBFS) in metakaolin as starting materials at the liquid/solid ratio of 0.60ml/g.

TL;DR: In this article, the pore structure of geopolymers was investigated by scanning electron microscopy (SEM), mercury intrusion porosimetry (MIP), and Brunauer-Emmett-Teller (BET) nitrogen adsorption.

TL;DR: In this paper, the influence of polypropylene (PP) fiber on the mechanical properties and volume stability of geopolymers was investigated, and the results of scanning electron microscopy (SEM) and the appearances of crack growths confirm that PP fiber can offer a bridging effect over the harmful pores and defects and change the expanding ways of cracks.

TL;DR: In this article, the effects of high-magnesium nickel slag (HMNS) addition on the reaction, mechanical properties and microstructure of fly ash-based geopolymers are studied through isothermal conduction calorimetry (ICC), compressive strength testing, mercury intrusion porosimetry, scanning electron microscopy (SEM), X-ray diffractometry (XRD) and drying shrinkage testing.