水泥石孔结构的X射线小角度散射研究

STUDY ON PORE STRUCTURE OF CEMENT PASTE BY SMALL ANGLE X-RAY SCATTERING

本文着重讨论了X射线小角度散射(SAXS)用于水泥石孔结构研究的方法以及相关的理论与实验问题。在大量实验的基础上,对国外同类工作中的某些有影响的结论提出了质疑。根据所得到的实验数据从一个侧面揭示了水泥石内比表面积与水灰比、相对湿度及干燥条件之间的关系。讨论了引起基件电子密度起伏不均的可能原因。实验结果对目前流行的孔结构模型中的某些观点提出了重新认识。本工作与其它实验研究手段相互补充有助于较全面和深入地了解水泥石的孔结构。

This paper is a part of the comprehensive studies on pore structure of cement paste. The small angle X-ray scattering (SAXS) method as a means for the study of pore structure is discussed theorectically and experimentally. According to the experiment, some existing current conclusions are considered to be questionable. The results listed in this paper reveal the relationships between pore structure and the factors such as W/C ratio, relative humidity as well as drying conditions. Also, the main reason for the electron density fluctuation occurred in the solid phase of cement paste is explored. Based on the discussion of the results, some viewpoints on the pore structure model are proposed. Furthermore, using SAXS together with other experimental methods, it is expected to be helpful in the study of the nature of cement paste comprehensively.