Properties of cement pastes with zeolite during early stage of hydration

被引：20

作者：

Bohac, Martin ^{[1
]}

Kubatova, Dana ^{[1
]}

Necas, Radovan ^{[1
]}

Zezulova, Anezka ^{[1
]}

Masarova, Alexandra ^{[1
]}

Novotny, Radoslav ^{[2
]}

机构：

[1] Res Inst Bldg Mat, Hnevkovskeho 65, Brno 61700, Czech Republic

[2] Brno Univ Technol, Fac Chem, Purkynova 118, Brno 61200, Czech Republic

来源：

ECOLOGY AND NEW BUILDING MATERIALS AND PRODUCTS 2016 | 2016年 / 151卷

关键词：

Cement; zeolite; hydration; calorimetry; rheology; TRICALCIUM SILICATE; DICALCIUM SILICATE; METAKAOLIN; POZZOLAN; FUME;

D O I：

10.1016/j.proeng.2016.07.349

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Properties of cement pastes with various replacement levels of natural zeolite were tested by isothermal calorimetry and rotational rheology. Zeolite from the Eastern Slovakia region was used for tests. Kinetics of exothermic reaction during early-stage of hydration were monitored by calorimetry. The role of different replacement level of zeolite on main rheological parameters is discussed in the paper. The onset point of formation of C-S-H products and the main calorimetric peak move to earlier times with increased zeolite content. Zeolite causes acceleration of hydration before the heat flow peak time and the following deceleration proportionally to its content. Zeolite in cement promotes the AFt formation, which increases the elastic response of fresh paste at the beginning of hydration. Trends of G' and phase angle show that zeolite accelerates the hydration of C3S and early C-S-H formation. (C) 2016 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license.

引用

页码：2 / 9

页数：8

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