C-F-S-H/PCE纳米晶核对矿粉水泥水化和力学性能的影响

Impact of C-F-S-H/PCE Nanocomposites on Hydration and Mechanical Properties of Slag Cement

研究了水化铁硅酸钙/聚羧酸减水剂(C-F-S-H/PCE)纳米晶核对矿粉水泥水化和力学性能的影响.采用力学性能测试、等温量热分析、X射线衍射仪和压汞法测试了大矿粉掺量(50%、70%、90%)矿粉水泥的抗压强度、水化放热、水化产物和孔隙率.结果表明:C-F-S-H/PCE纳米晶核的掺入能够显著提升矿粉水泥的抗压强度,50%矿粉掺量的矿粉水泥1 d强度提升60%;C-F-S-H/PCE纳米晶核对矿粉水泥的水化反应具有调控作用,通过加速水泥的早期水化及氢氧化钙的形成激发了矿粉反应活性,从而推动了矿粉反应的持续进行.

The influence of calcium-ferrite-silicate-hydrates/polycarboxylate ether(C-F-S-H/PCE)nanocomposites on the hydration and mechanical properties of slag cement were investigated.Various methods including mechanical property testing,isothermal calorimetry,X-ray diffraction,and mercury intrusion porosimeter were employed to investigate the compressive strength,hydration,and microstructure of the cement blended with large slag levels(50%,70%,90%).The results reveal that the C-F-S-H/PCE nanocomposites significantly enhance the compressive strength of slag cement.The 1 day compressive strength of slag cement with 50%slag content is increased by 60%.C-F-S-H/PCE nanocomposites have a regulatary effect on the hydration reaction of slag cement.By accelerating the early hydration of cement and the formation of calcium hydroxide,the reactivity of the slag is stimulated,thus promoting its continuous reaction.