本文在提出新拌水泥基复合材料离折行为的三个层次统一模型的基础上,对从流变学角度难以评价的与材料离析直接相关的水泥浆保水特性进行了研究,提出了水泥浆保水能力的临界值,并对不同配合比、各种外加剂以及掺加方法对保水能力的影响进行了试验考察,其结果对丰富新拌混凝土理论及实际工程应用非常有益。 In this paper, on the basis of the three-level unified model of freshly-disintegrated cement-based composites, the water-retention characteristics of cement pastes that are directly related to material segregation, which are difficult to evaluate from the perspective of rheology, are studied. The critical value of capability, and the effect of different mix ratios, various admixtures and addition methods on the water holding capacity were tested. The results are very useful for enriching the theory of fresh concrete and practical engineering applications.