Influence of degree of dehydroxylation on the pozzolanic activity of metakaolin

被引：216

作者：

Bich, Ch. ^{[1
]}

Ambroise, J. ^{[1
]}

Pera, J. ^{[1
]}

机构：

[1] Inst Natl Sci Appl, LGCIE, F-69621 Villeurbanne, France

来源：

APPLIED CLAY SCIENCE | 2009年 / 44卷 / 3-4期

关键词：

Dehydroxylation; Metakaolin; Pozzolanic activity; CEMENT PASTES; HYDRATION; MORTARS;

D O I：

10.1016/j.clay.2009.01.014

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Three kaolins were heated between 500 and 850 degrees C. The samples were tested by X-ray diffraction (XRD), differential thermal analysis (DTA), and Infra-Red (IR) spectroscopy in order to determine their mineralogical composition and degrees of crystallinity and clehydroxylation. The reactivity of the heated samples was evaluated by the determination of the residual quantity of Ca(OH)(2) by differential thermal analysis (DTA) performed on hydrated mixtures of 50% metakaolin and 50% Ca(OH)(2). There was no direct relationship between the pozzolanic activity of metakaolin and the degree of dehydroxylation. Highest activity was obtained when the degree of dehydroxylation was >95%. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：194 / 200

页数：7

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