Zuhua Zhang

TL;DR: In this article, the authors address some of the sustainability questions currently facing the cement and concrete industry, in the context of the utilisation of foam concretes based either on ordinary Portland cement (OPC) or on geopolymer binders.

TL;DR: In this paper, a fly ash with partial slag substitution was used for GFC synthesis by mechanical mixing of preformed foam, and the GFCs exhibited 28 d compressive strengths ranging from 3 to 48 MPa with demolded densities from 720 to 1600 kg/m3 (105 °C oven-dried densities ranging from 585 to 1370 kg /m3), with the different densities achieved through alteration of the foam content.

TL;DR: In this article, isothermal conduction calorimetry (ICC) is used to measure the kinetics of geopolymerisation of metakaolin by reaction with NaOH solution under a variety of conditions.

TL;DR: In this paper, the efflorescence of fly ash-based geopolymers is investigated. And the authors propose a relationship between alkali leaching from monosized fractured particles and the potential of efflorescence.

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.