Influence of organoclay structural characteristics on properties and hydration of cement pastes

被引：15

作者：

Cesniene, Jurate ^{[1
]}

Baltusnikas, Arunas ^{[1
]}

Lukosiute, Irena ^{[1
]}

Brinkiene, Kristina ^{[1
]}

Kalpokaite-Dickuviene, Regina ^{[1
]}

机构：

[1] Lithuanian Energy Inst, Lab Mat Res & Testing, Breslaujos Str 3, LT-44403 Kaunas, Lithuania

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2018年 / 166卷

关键词：

Cement; Organically modified montmorillonite; Hydration; Strength; Sorptivity; XRD/Rietveld; SEM/EDS; Microstructure; PORTLAND-CEMENT; COMPOSITE CEMENTS; S-H; CONCRETE; MONTMORILLONITE; LIMESTONE; MICROSTRUCTURE; NANOCOMPOSITES; PARTICLES; NANOCLAY;

D O I：

10.1016/j.conbuildmat.2018.01.099

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

In this study the effect of small amount (1 wt%) of organically modified montmorillonite (OMT) on the hydration peculiarities, strength and water sorptivity of cement pastes was investigated. Three types of OMT with cation exchange degrees 0.6, 0.8 and 1.0 were selected for cement substitution in the paste. Cement hydration was analysed by XRD/Rietveld method, SEM/EDS and thermogravimetric analysis. OMT of lower cation exchange degree (0.6) displayed pozzolanic behaviour after 14 days while the activity of OMT with higher cation exchange degree (0.8-1.0) was observed only after 28 days. The use of OMT with higher cation exchange degree resulted in the extra formation of aluminohydrates in cement pastes. The capillary sorption of the samples decreased with the increase of the cation exchange degree of OMT. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：59 / 71

页数：13

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