This study focused on the development of reactive MgO (RM) activated-GGBS binders containing fly ash (FA). Performance of these binders was aimed to be improved by enhancing the hydration of RM and dissolution of GGBS and FA via high temperature pre-curing (HTPC); and conversion of unreacted phases into carbonates via carbonation. Spherical FA particles mitigated inter-particle surface frictions and improved flow. Although the use of HTPC accelerated the hydration of MgO, rapid precipitation of brucite hindered the dissolution of GGBS and FA and formation of associated hydration products. Transformation of RM into hydrated magnesium carbonates (HMCs) under carbonation led to significant improvements in sample performance via the pore filling effect and binding strength provided by HMCs, despite the degradation of ettringite and C-(A)-S-H during carbonation. Inclusion of 12 % FA resulted in comparable strengths to the control sample, highlighting the feasibility of incorporating FA within RM activated-GGBS samples without compromising performance.

这项研究的重点是开发含有粉煤灰（FA）的反应性MgO（RM）活化的GGBS粘合剂。这些粘合剂的性能旨在通过高温预固化（HTPC）增强RM的水合以及GGBS和FA的溶解来改善；以及通过碳酸化将未反应的相转化为碳酸盐。球形FA颗粒减轻了颗粒间的表面摩擦并改善了流动性。尽管使用HTPC可以加速MgO的水合，但是水镁石的快速沉淀阻碍了GGBS和FA的溶解以及相关水合产物的形成。在碳酸化作用下，RM转变为水合碳酸镁（HMC），通过HMC提供的孔填充效果和结合强度，显着改善了样品性能，尽管碳酸化过程中钙矾石和C-（A）-SH降解。包含12％的FA可以得到与对照样品相当的强度，突出了将FA掺入RM活化的GGBS样品中而不损害性能的可行性。