Cementitious characteristics of hydrated cement paste subjected to various dehydration temperatures

被引：139

作者：

Shui, Zhonghe ^{[1
]}

Xuan, Dongxing ^{[1
]}

Chen, Wei ^{[1
]}

Yu, Rui ^{[1
]}

Zhang, Rui ^{[1
]}

机构：

[1] Wuhan Univ Technol, Sch Mat Sci & Engn, Wuhan 430070, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2009年 / 23卷 / 01期

关键词：

Dehydrated cement paste; Rehydration capacity; Cementitious characteristics; Dehydration temperature; SILICATE; CONCRETE; DECOMPOSITION; REHYDRATION; STRENGTH;

D O I：

10.1016/j.conbuildmat.2007.10.016

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This paper emphasizes on studying the cementitious characteristics and the relative rehydration capability of dehydrated cement paste (DCP). Several specimens of DCP were firstly prepared, respectively after pre-heating the powders of hydrated cement paste (HCP) at different temperatures ranging from 300 degrees C to 900 degrees C. The cementitious properties of each DCP were then evaluated by the required water of standard consistency, setting time, degree of rehydration, compressive strength development and microstructure evolution. The experimental results show that DCP has highly required water of standard consistency, short setting time and rapid rehydration rate compared with ordinary Portland cement, and also indicate that the rehydration capacity of DCP is influenced by the dehydration temperature. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：531 / 537

页数：7

共 19 条

[1]

Ahn Jaecheol, 2004, [Journal of the Architectural Institute of Korea Structure & Construction, 대한건축학회논문집 구조계], V20, P91

[2] The use of thermal analysis in assessing the effect of temperature on a cement paste [J].

Alarcon-Ruiz, L ;

Platret, G ;

Massieu, E ;

Ehrlacher, A .

CEMENT AND CONCRETE RESEARCH, 2005, 35 (03) :609-613

[3] Dehydration and rehydration processes of cement paste exposed to high temperature environments [J].

Alonso, C ;

Fernandez, L .

JOURNAL OF MATERIALS SCIENCE, 2004, 39 (09) :3015-3024

[4] Composition and microstructural changes of cement pastes upon heating, as studied by neutron diffraction [J].

Castellote, M ;

Alonso, C ;

Andrade, C ;

Turrillas, X ;

Campo, J .

CEMENT AND CONCRETE RESEARCH, 2004, 34 (09) :1633-1644

[5] SI-29 MAS NMR-STUDY OF THE HYDRATION OF TRICALCIUM SILICATE IN THE PRESENCE OF FINELY DIVIDED SILICA [J].

DOBSON, CM ;

GOBERDHAN, DGC ;

RAMSAY, JDF ;

RODGER, SA .

JOURNAL OF MATERIALS SCIENCE, 1988, 23 (11) :4108-4114

[6] Rehydration and microstructure of cement paste after heating at temperatures up to 300 °C [J].

Farage, MCR ;

Sercombe, J ;

Gallé, C .

CEMENT AND CONCRETE RESEARCH, 2003, 33 (07) :1047-1056

[7] Estimation of the degree of hydration of blended cement pastes by a scanning electron microscope point-counting procedure [J].

Feng, X ;

Garboczi, EJ ;

Bentz, DP ;

Stutzman, PE ;

Mason, TO .

CEMENT AND CONCRETE RESEARCH, 2004, 34 (10) :1787-1793

[8] Silicate anion structural change in calcium silicate hydrate gel on dissolution of hydrated cement [J].

Haga, K ;

Shibata, M ;

Hironaga, M ;

Tanaka, S ;

Nagasaki, S .

JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY, 2002, 39 (05) :540-547

[9] Thermal decomposition of ettringite Ca-6[Al(OH)(6)](2)(SO4)(3).26H(2)O [J].

Hall, C ;

Barnes, P ;

Billimore, AD ;

Jupe, AC ;

Turrillas, X .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1996, 92 (12) :2125-2129

[10] Physicochemical, mineralogical, and morphological characteristics of concrete exposed to elevated temperatures [J].

Handoo, SK ;

Agarwal, S ;

Agarwal, SK .

CEMENT AND CONCRETE RESEARCH, 2002, 32 (07) :1009-1018

← 1 2 →