Abstract: Aluminum sulfate alkali-free liquid accelerators are shotcrete admixtures used in the construction of tunnels and culverts. However, the hydration rate of ordinary portland cement (OPC) with aluminum sulfate alkali-free ...

Abstract: The high shrinkage of metakaolin-based geopolymers (MKGs) dramatically limits their application as high-performance green cementitious materials. In this study, microscopic tests and microstructure analysis of the ...