摘要
从流体力学的角度对水泥净浆流动度试验开展研究,在考虑流体表面张力和表面浸润性的情况下,对流体屈服应力和流动度之间的关系开展了较文献中现有结果更为严格的理论分析,获得了一组新的公式,完善了Roussel等人的理论工作。在此基础上,定量计算了表面张力和浸润性、截锥圆模容积、浆体密度对屈服应力和流动度之间关系的影响。
The mini-conical slump flow test, also known as the fluidity test, is one of the most common methods for quality control in characterizing cement pastes and grouts and for a quick evaluation of the performance of chemical admixtures. There have already been many research efforts to relate the final spread of the slumped paste to its yield stress, with maybe the most convincing one being the theoretical work of Roussel et al., where analytical expressions were derived based on hydrostatic considerations, with the influences of surface tension and wettability accounted for by a fitting parameter. Here, a more rigorous theoretical treatment of the effects of surface tension and wettability is repored, A set of equations for the relation between final spread and yield stress, with no physical ambiguous fitting parameters, are derived. The results are compared with those of Roussel etal, and the influences of surface tension and wettability, sample volume, and paste density are studied within this theoretical framework.
出处
《混凝土与水泥制品》
北大核心
2018年第2期1-6,共6页
China Concrete and Cement Products
基金
国家重点研发计划项目(2017YFB0310100)
高性能土木工程材料国家重点实验室开放基金课题(2014CEM001).
