磺化脲醛对水泥水化机理的影响

EFFECT OF SULFONATED UREA-FORMADEHYDE ON CEMENT HYDRATION MECHANISM

本文研究了磺化脲醛大分子（ＳＵＦ）对水泥水化体系的作用，并从机理上分析了这种作用的影响。Ｘ－射线衍射分析、红外光谱分析及结合水的测定，都从不同角度阐明了由于水泥颗粒对ＳＵＦ大分子的吸附，使得电位增高、粒子间斥力增大、分散均匀、水化完全。同时改变了水化产物结晶的速度和晶体的分布状态。结果使水泥石结构密实，晶体间搭接合理，空隙率减少，强度提高。

This paper deals with the effects of sulfonated ureafortnaldehyde (SUF) on the hydration process of cement. X-ray, infrared spectrum and bound-water determination indicated that cement granules absorbed SUF molecules. This makes the static potential and repulsion between the granules increase, resulting in a complete dispersic and hydration. At the same time, crystailinity of the hydrated cement anddistribution of the crystallites changed, increasing the final strength of treated cement.