Effect of temperature on the early-stage hydration characteristics of Portland cement: A large-volume calorimetric study

被引：14
作者：
Zakoutsky, Jan [1 ]
Tydlitat, Vratislav [1 ]
Cerny, Robert [1 ]
机构：
[1] Czech Tech Univ, Dept Mat Engn & Chem, Fac Civil Engn, Prague 16629 6, Czech Republic
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2012年 / 36卷
关键词：
Hydration heat; Isothermal heat flow calorimeter; Cement paste; w/c; Temperature; Apparent activation energy; FURNACE SLAG CEMENT; CONCRETE; KINETICS;
D O I：
10.1016/j.conbuildmat.2012.06.025
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
A large-volume isothermal heat flow calorimeter is applied for determination of the specific hydration heat power. N, and specific hydration heat, Q of Portland cement CEM I 42.5 R as a function of time. The measurements are carried out for the cement paste with w/c = 0.3, 0.35, and 0.4 in the temperature range of 5-30 degrees C. Experimental results show that Q in the initial hydration phase (including C(3)A hydration and the dormant period up to the first local minimum on the N(t) curve) decreases two times when the temperature increases from 5 degrees C to 30 degrees C, and it is independent of w/c within the studied range. The second local maximum on the N(t) curve (corresponding to the C3S hydration phase) is four to five times higher for 30 degrees C as compared with 5 degrees C, and it decreases up to 20% with increasing w/c; the time of its appearance is three times lower for 30 degrees C than 5 degrees C, and it is also independent of w/c. The apparent activation energy of the CEM I 42.5 R hydration is found independent of w/c within the analyzed range, its average value being 32.2 kJ/mol. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：969 / 976
页数：8
相关论文
共 30 条
[1]  
Adams L.D., 1976, CEMENT CONCRETE RES, V6, P293, DOI [10.1016/0008-8846(76)90127-7, DOI 10.1016/0008-8846(76)90127-7]
[2]   Optimization of cement and fly ash particle sizes to produce sustainable concretes [J].
Bentz, Dale P. ;
Hansen, Andrew S. ;
Guynn, John M. .
CEMENT & CONCRETE COMPOSITES, 2011, 33 (08) :824-831
[3]   Possibilities of the use of isoperibolic calorimetry for assessing the hydration behavior of cementitious systems [J].
Brandstetr, J ;
Polcer, J ;
Krátky, J ;
Holesinsky, R ;
Havlica, J .
CEMENT AND CONCRETE RESEARCH, 2001, 31 (06) :941-947
[4]   Conception of an isothermal calorimeter for concrete— Determination of the apparent activation energy [J].
M. Broda ;
E. Wirquin ;
B. Duthoit .
Materials and Structures, 2002, 35 (7) :389-394
[5]  
Cerny R., 2002, TRANSPORT PROCESSES
[6]   Hydration Kinetics of Phosphorus Slag-cement Paste [J].
Chen Xia ;
Fang Kunhe ;
Yang Huaquan ;
Peng Hua .
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION, 2011, 26 (01) :142-146
[7]   GENERAL HYDRATION MODEL FOR PORTLAND-CEMENT AND BLAST-FURNACE SLAG CEMENT [J].
DE SCHUTTER, G ;
TAERWE, L .
CEMENT AND CONCRETE RESEARCH, 1995, 25 (03) :593-604
[8]   Hydration and temperature development of concrete made with blast-furnace slag cement [J].
De Schutter, G .
CEMENT AND CONCRETE RESEARCH, 1999, 29 (01) :143-149
[9]   Monitoring the early-age hydration of self-compacting concrete using ultrasonic p-wave transmission and isothermal calorimetry [J].
Desmet, Bram ;
Atitung, Kelly Chrysanthe ;
Sanchez, Miguel Angel Abril ;
Vantomme, John ;
Feys, Dimitri ;
Robeyst, Nicolas ;
Audenaert, Katrien ;
De Schutter, Geert ;
Boel, Veerle ;
Heirman, Gert ;
Cizer, Ozlem ;
Vandewalle, Lucie ;
Van Gemert, Dionys .
MATERIALS AND STRUCTURES, 2011, 44 (08) :1537-1558
[10]   A method based on isothermal calorimetry to quantify the influence of moisture on the hydration rate of young cement pastes [J].
Gerstig, Michael ;
Wadso, Lars .
CEMENT AND CONCRETE RESEARCH, 2010, 40 (06) :867-874
123