In this study, two different ultra-fine ground granulated blast furnace slag referred to as GS (i.e., by dry-winnowing method) and WS (i.e., by wet-grinding method) were obtained, and the hydration and rheology of activated ultra-fine ground granulated blast furnace slag (activated-BFS) with carbide slag and anhydrous phosphogypsum (AG) as combined activator were systematically investigated by means of setting time, workability, rheological behavior, compressive strength, autogenous shrinkage, electrical resistivity, SEM, XRD and TG-DTG. The results showed that the limiting factor is the BFS type, and not the AG dosage in terms of setting time, and their rheological behavior fitted with H–B model. WS and increase in AG dosage significantly reduced the plastic viscosity, shear stress and yield stress of activated-BFS pastes. The WS presented higher initial reaction activity that generated more hydrates in the early age, restricting the further hydration of BFS particles especially when AG dosage exceeded 10%, thus leading to the different compressive strength development trends between mixtures containing WS (WS/A) and GS (GS/A). The compressive strength of GS/A mixtures increased with increasing AG dosage and reached 39.9 MPa at 3 days, while WS/A first increased and then decreased. The activated-BFS with carbide slag and AG is technically feasible to be employed as cementitious materials in the production of concrete.

本研究获得了两种不同的超细磨粒高炉渣，分别称为 GS（即干风选法）和 WS（即湿磨法），并研究了活化超细粒化高炉矿渣的水化和流变性。以电石渣和无水磷石膏（AG）为复合活化剂的细磨粒化高炉渣（活化-BFS）通过凝固时间、可加工性、流变行为、抗压强度、自收缩、电阻率、SEM、XRD和TG-DTG。结果表明，就凝结时间而言，限制因素是BFS类型，而不是AG用量，其流变行为符合H-B模型。WS和AG用量的增加显着降低了活化BFS浆料的塑性粘度、剪切应力和屈服应力。WS 表现出较高的初始反应活性，在早期产生更多的水合物，限制了 BFS 颗粒的进一步水合，尤其是当 AG 用量超过 10% 时，从而导致含 WS (WS/A) 和GS（GS/A）。GS/A混合物的抗压强度随着AG用量的增加而增加，3天时达到39.9 MPa，而WS/A则先升高后降低。具有电石渣和 AG 的活化 BFS 在技术上可用作混凝土生产中的胶凝材料。从而导致含WS（WS/A）和GS（GS/A）的混合物抗压强度发展趋势不同。GS/A混合物的抗压强度随着AG用量的增加而增加，3天时达到39.9 MPa，而WS/A则先升高后降低。具有电石渣和 AG 的活化 BFS 在技术上可用作混凝土生产中的胶凝材料。从而导致含WS（WS/A）和GS（GS/A）的混合物抗压强度发展趋势不同。GS/A混合物的抗压强度随着AG用量的增加而增加，3天时达到39.9 MPa，而WS/A则先升高后降低。具有电石渣和 AG 的活化 BFS 在技术上可用作混凝土生产中的胶凝材料。