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

被引：471
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.
引用
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
    BECKE, AD
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1993, 98 (07) : 5648 - 5652
  • [2] Signatures of a drying SiO2•(H2O)x gel from Raman spectroscopy and quantum chemistry
    Björnström, J
    Martinelli, A
    Johnson, JRT
    Matic, A
    Panas, I
    [J]. 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
    Cong, XD
    Kirkpatrick, RJ
    [J]. ADVANCED CEMENT BASED MATERIALS, 1996, 3 (3-4): : 133 - 143
  • [5] Si-29 MAS NMR study of the structure of calcium silicate hydrate
    Cong, XD
    Kirkpatrick, RJ
    [J]. 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
    Delgado, AH
    Paroli, RM
    Beaudoin, JJ
    [J]. 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
    Frost, RL
    Ding, Z
    [J]. 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
    ISHIDA, H
    MABUCHI, K
    SASAKI, K
    MITSUDA, T
    [J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1992, 75 (09) : 2427 - 2432
123