From microstructure to macrostructure: an integrated model of structure formation in polymer-modified concrete
From microstructure to macrostructure: an integrated model of structure formation in polymer-modified concrete
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DOI：
10.1617/14215
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发表时间：
2005-07-01
影响因子：
3.8
通讯作者：
Czarnecki, L
中科院分区：
文献类型：
--
作者：
Beeldens, A;Van Gemert, D;Czarnecki, L
提出了聚合物改性胶凝材料微观结构形成的模型。研究了水泥水化和聚合物成膜过程，着重研究了水泥颗粒和聚合物颗粒之间的协同作用。微观结构水平的改变导致改性材料的性质的宏观变化。在本文中，聚合物的加入对水泥水化物的外观和存在的聚合物膜通过水泥水化物的影响提出了有关的最低成膜温度。由于水泥颗粒的存在和水泥水合作用，可以在较低温度下进行成膜，从而可以使用具有稍高MFT（最低成膜温度）的聚合物分散体。这对于聚合物改性材料的物理和机械性能是重要的。研究结果已被列入一个综合模型的基础上的三步模型的Ohama，其中聚合物膜的形成和水泥水化过程中集成的相互关系。纳入了对这两个过程的时间依赖性评价。本文所介绍的研究是比利时鲁汶大学土木工程系博士研究的一部分[I]。1359-5997（C）2004 RILEM。All rights reserved.
A model is proposed for the formation of the microstructure in polymer-modified cementitious materials. Cement hydration and polymer film formation were studied, with specific emphasis on the synergetic effect between cement particles and polymer particles. Alterations at the microstructure level result in macroscopic changes in the properties of the modified material. In this paper, the influence of the polymer addition on the appearance of the cement hydrates and the presence of the polymer film through the cement hydrates are presented in relation to the minimum film forming temperature. Owing to the presence of the cement particles and to cement hydration, film formation can take place at lower temperatures, so that a polymer dispersion with a slightly higher MFT (minimum film forming temperature) can be used. This is important for the physical and mechanical properties of the polymer-modified materials. The findings have been included in an integrated model based on the three-step model of Ohama, in which the polymer film formation and the cement hydration processes are integrated in relation to each other. A time-dependent evaluation of both processes was incorporated. The research presented in this paper was part of a PhD research at the Civil Engineering Department, University of Leuven, Belgium [I]. 1359-5997 (C) 2004 RILEM. All rights reserved.