In recent years, a novel concept to accelerate cement hydration has been proposed by adding external nuclei into a hydrating cementitious system, which is called seeding technology.In this way, promotion of the early strength growth of the cementitious materials can be expected.On the other hand, supplementary cementitious materials (SCMs) and chemical admixtures have become indispensable components in practice of the modem concrete and mortar formulations.It has been realized that many popularly used SCMs such as fly ash and the mostly applied superplasticizers such as polycarboxylate superplasticizer (PCE) often lead to lower early strength of the hardened materials due to the slower reaction rate or the retardation effect on cement hydration,which is undesired in many application fields, e.g.pre-fabricated concrete industry and repair mortars.