Development of different alkaline electrolysed water on early-strength enhancement and hydration acceleration of cement-based materials

The influence of three alkaline electrolysed water including the potassium-based electrolysed water (KEW), sodium-based electrolysed water (NEW), and electrolytic tap water (ETW) on enhancing the early-strength and hydration behavior of cement composites was investigated in this study. The results indicated that different alkaline electrolysed water all can improve the workability and strength of cement composites to some extent. The 28-d compressive strength of KEW, NEW and ETW mortar increased by 7.1%, 7.7% and 2.1% respectively than to that of ordinary tap water mortar, the hydration process of KEW and NEW pastes hydration was both accelerated to produce more hydration heat and hydration products, making the microstructure of paste more compact. In contrast, the effect of ETW on the hydration behavior of paste was not noticeable as comparison to that of ordinary tap water paste, which may be related to its low OH- concentration and ionic activity due to the lack of positively charged metal ions.