Properties of hydraulic paste of basic oxygen furnace slag

被引：55

作者：

Belhadj, Essia ^{[1
]}

Diliberto, Cecile ^{[1
]}

Lecomte, Andre ^{[1
]}

机构：

[1] Nancy Univ, UMR UPVM CNRS 7198, Inst Jean Lamour, IUT Nancy Brabois,CP2S 207, F-54601 Villers Les Nancy, France

来源：

CEMENT & CONCRETE COMPOSITES | 2014年 / 45卷

关键词：

BOF slag; Hydraulic paste; Valorization; Activation; PHYSICAL-PROPERTIES; EXPANSION;

D O I：

10.1016/j.cemconcomp.2013.09.016

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Basic Oxygen Furnace (BOF) slags are by-products of the conversion of pig iron to steel. They mainly contain C2S, C2F, Fe1-xO, CaO, Ca(OH)(2) and CaCO3. According to their chemical composition they are a valuable mineral resource as additions in certain hydraulic binders. This paper presents a hydration study of the BOF slag pastes preserved at different temperatures and in different environments. Pastes are characterized by X-ray diffraction and scanning electron microscopy. The compressive strengths of hydrated pastes are given at 7, 28, 90 and 190 days. Results show that - BOF slags containing 40% of C2S - have attractive mechanical properties. Hydration tests under water showed a pastes swelling due to the hydration of CaO contained in BOF slags. A lime extinction procedure was proposed as alternative to standard PR NF EN 13282-2. This approach is more effective for these materials: the volume expansion of pastes cured in water is avoided and the compressive strengths are thus significantly improved. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：15 / 21

页数：7

共 16 条

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