A model for the microstructure of calcium silicate hydrate in cement paste
A model for the microstructure of calcium silicate hydrate in cement paste
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DOI：
10.1016/s0008-8846(99)00209-4
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发表时间：
2000-01-01
影响因子：
11.4
通讯作者：
Jennings, HM
中科院分区：
文献类型：
--
作者：
Jennings, HM
本文提出了一个波特兰水泥水化过程中生成的水化硅酸钙（C-S-H）结构模型。该模型的一个目的是走向定量评估微观结构的能力，使其一方面与性能相关，另一方面与加工相关。这是一个假设，旨在促进讨论和激励实验。此外，该模型是一种尝试，以合理化不同的测量比表面积在文献中报道的描述一个潜在的结构，其中，当观察到不同的仪器，给出不同的结果。它是尺寸范围约1至100纳米内微观结构的简化表示。基本的积木是一个单位的C-S-H，大致是球形和apl？直径约为2 nm，比表面积约为1，000 m2/g。这些结构单元絮凝形成更大的单元。本文描述了基本单元的结构，以及它们如何组合形成更大的结构和微观结构。该模型还解释了一些变量的观察，如比表面积，孔径和密度，由不同的技术，以及在不同的相对湿度的水含量测定的测量属性。(C)2000爱思唯尔科技有限公司版权所有。
A model is proposed for the structure of calcium silicate hydrate (C-S-H) as it is formed during the hydration of Portland cement. One purpose of the model is to move toward an ability to evaluate the microstructure quantitatively, so that it can be related to properties on the one hand and processing on the other hand. It is a hypothesis intended to promote discussion and motivate experiments. Furthermore, the model is an attempt to rationalize disparate measurements of specific surface area reported in the literature by describing an underlying structure, which, when observed by different instruments, gives different results. It is a simplified representation of the microstructure within the size range of about 1 to 100 nm. The basic building block is a unit of C-S-H that is roughly spherical and apl?roximately 2 nm across with a specific surface area of about 1,000 m(2)/g. These building blocks flocculate to form larger units. This paper describes the structure of the basic units and how they pack to form larger structures and microstructures. The model also explains a number of variant observations for such measured attributes as specific surface area, pore size, and density as determined by different techniques, as well as water content at different relative humidities. (C) 2000 Elsevier Science Ltd. All rights reserved.