Accelerating effects of colloidal nano-silica for beneficial calcium-silicate-hydrate formation in cement

被引：477
作者：
Björnström, J
Martinelli, A
Matic, A
Börjesson, L
Panas, I
机构：
[1] Gothenburg Univ, Dept Inorgan Chem, SE-41296 Gothenburg, Sweden
[2] Chalmers Univ Technol, Dept Appl Phys, SE-41296 Gothenburg, Sweden
来源：
CHEMICAL PHYSICS LETTERS | 2004年 / 392卷 / 1-3期
关键词：
D O I：
10.1016/j.cplett.2004.05.071
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The hydration process of Ca3SiO5 (C3S) cement is investigated, and accelerating effects of adding colloidal silica (CS) are established. CS accelerates dissolution of the C3S phase, and renders a more rapid formation of the calcium-silicate-hydrate (C-S-H) binding phase. The role of water is demonstrated. Water evaporation correlates with the appearance of a sharp IR band at 3650 cm(-1) signifying non-hydrogen bonded OH groups. Incomplete hydration results in Ca(OH)(2) precipitation. Suppression of water evaporation causes the 3650 cm(-1) band to vanish. The Ca2+ ions become incorporated in the C-S-H network, the formation of which is accelerated by CS. (C) 2004 Elsevier B.V. All rights reserved.
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收藏
页码：242 / 248
页数：7
相关论文
共 25 条
[1]   DENSITY-FUNCTIONAL THERMOCHEMISTRY .3. THE ROLE OF EXACT EXCHANGE [J].
BECKE, AD .
JOURNAL OF CHEMICAL PHYSICS, 1993, 98 (07) :5648-5652
[2]   Signatures of a drying SiO2•(H2O)x gel from Raman spectroscopy and quantum chemistry [J].
Björnström, J ;
Martinelli, A ;
Johnson, JRT ;
Matic, A ;
Panas, I .
CHEMICAL PHYSICS LETTERS, 2003, 380 (1-2) :165-172
[3]  
CHANDRA S, 1998, P 6 CANMET ACI INT C, P323
[4]   Si-29 and O-17 NMR investigation of the structure of some crystalline calcium silicate hydrates [J].
Cong, XD ;
Kirkpatrick, RJ .
ADVANCED CEMENT BASED MATERIALS, 1996, 3 (3-4) :133-143
[5]   Si-29 MAS NMR study of the structure of calcium silicate hydrate [J].
Cong, XD ;
Kirkpatrick, RJ .
ADVANCED CEMENT BASED MATERIALS, 1996, 3 (3-4) :144-156
[6]   Comparison of IR techniques for the characterization of construction cement minerals and hydrated products [J].
Delgado, AH ;
Paroli, RM ;
Beaudoin, JJ .
APPLIED SPECTROSCOPY, 1996, 50 (08) :970-976
[7]  
Frisch M.J., 1998, GAUSSIAN 98
[8]   Controlled rate thermal analysis and differential scanning calorimetry of sepiolites and palygorskites [J].
Frost, RL ;
Ding, Z .
THERMOCHIMICA ACTA, 2003, 397 (1-2) :119-128
[9]  
HUGHES TL, 1995, ADV CEM BASED MATER, V2, P91, DOI 10.1016/1065-7355(94)00031-8
[10]   LOW-TEMPERATURE SYNTHESIS OF BETA-CA2SIO4 FROM HILLEBRANDITE [J].
ISHIDA, H ;
MABUCHI, K ;
SASAKI, K ;
MITSUDA, T .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1992, 75 (09) :2427-2432
123