NSF Young Investigator

研究方案涉及新拌水泥净浆和混凝土的流变性。水泥流变学中有许多具有挑战性的科学问题。了解各种动态微观结构过程，不仅对于了解水泥浆体的流动行为，而且对于预测和控制混凝土的流动都是至关重要的。一个动态过程是水化，混凝土通过水化从液体转变为固体。另一个是絮凝和被絮凝的颗粒对剪切的响应。未来五年的长期目标是开发一种基于微观结构的模型来模拟水泥浆体和混凝土的流动行为。这项工作将专注于开发一种基于计算机的水化、絮凝和流动行为的动态微观结构模拟。模拟将基于颗粒相互作用的物理化学方面，包括那些由水化反应引起的相互作用，这种方法通常类似于非平衡分子动力学，这是一种最近用于模拟悬浮液流动行为的方法。

The research plan involves the rheological behavior of fresh cement paste and concrete. There are a number of challenging scientific issues in cement rheology. It is critical to understand the various dynamic microstructural processes, not only to understand flow behavior of cement paste, but also to predict and control flow of concrete. One dynamic process is hydration, through which concrete transforms from liquid to solid. Another is flocculation and the response of flocculated particles to shear. The long- range objective during the next five years is to develop a microstructure-based model to simulate the flow behavior of cement past and concrete. The effort will focus on developing a dynamic computer-based microstructural simulation of hydration, flocculation and flow behavior. The simulation will be based on physicochemical aspects of particle interactions, including those resulting from hydration reactions, an approach generally similar to non-equilibrium molecular dynamics, a recent approach for modeling flow behavior of suspensions.