Investigation on the hydration of CFBC fly ash

被引：95
|
作者：
Sheng, Guanghong [2 ]
Li, Qin [1 ]
Zhai, Jianping [1 ]
机构：
[1] Nanjing Univ, Sch Environm, State Key Lab Pollut Control & Resource Reuse, Nanjing 210093, Jiangsu, Peoples R China
[2] Anhui Univ Technol, Sch Architecture & Civil Engn, Maanshan 243002, Anhui, Peoples R China
来源：
FUEL | 2012年 / 98卷
关键词：
CFBC fly ash; Self-cementing; Lime; Hydration; DIFFERENTIAL SCANNING CALORIMETRY; CO-FIRING COAL; COMBUSTION ASHES; TECHNOLOGIES; SULFATION; BEHAVIOR;
D O I：
10.1016/j.fuel.2012.02.008
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Self-cementitious properties of fly ash from circulating fluidized bed combustion boiler (CFBC) with limestone addition were investigated, especially the effect of lime on self-cementing process. The CFBC fly ash is self-cementitious and its main hydration products are ettringite (AFt), hydrated calcium silicate (CSH), portlandite, and gypsum. Slaking of free lime has a great effect on the self-cementing process of CFBC fly ash, accelerating the setting process. The self-cementing process of CFBC fly ash paste is based on three main reactions: (1) generation of Ca(OH)(2) micelles by quick slaking of lime, (2) generation of AFt by active alumina reacting with CaSO4 and Ca(OH)(2), and (3) generation of CSH by active silica reacting with Ca(OH)(2). (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：61 / 66
页数：6
相关论文
共 50 条
  • [21] The Effect of Anhydrite on the Hydration of CFBC Ash-Clinker-Water System
    Xu, Huizhong
    Song, Yuanming
    Wang, Bo
    APPLICATIONS OF ENGINEERING MATERIALS, PTS 1-4, 2011, 287-290 : 754 - 757
  • [22] Effect of curing conditions on the hydration and performance of CFBC ash cementitious system
    Song Yuanming
    Qian Jueshi
    Liu Jingxiang
    Wang Bo
    Wei Yingchun
    JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION, 2014, 29 (01): : 93 - 96
  • [23] Carbonation Behavior of Fly Ash with Circulating Fluidized Bed Combustion (CFBC)
    Bae, Soon Jong
    Lee, Ki Gang
    JOURNAL OF THE KOREAN CERAMIC SOCIETY, 2015, 52 (02) : 154 - 158
  • [24] Frost salt scaling resistance of concrete containing CFBC fly ash
    Glinicki, Michal A.
    Zielinski, Marek
    MATERIALS AND STRUCTURES, 2009, 42 (07) : 993 - 1002
  • [25] THE PROPERTIES OF MASS CONCRETE WITH CFBC FLY ASH-SLAG BINDER
    Machowska, Agnieszka
    ARCHIVES OF CIVIL ENGINEERING, 2020, 66 (04) : 471 - 484
  • [26] Binder chemistry of sodium carbonate-activated CFBC fly ash
    S. M. Park
    J. H. Seo
    H. K. Lee
    Materials and Structures, 2018, 51
  • [27] Adsorption properties of CFBC ash–cement pastes as compared with PCC fly ash–cement pastes
    Wang Z.
    Song Y.
    International Journal of Coal Science & Technology, 2016, 3 (1) : 62 - 67
  • [28] Frost salt scaling resistance of concrete containing CFBC fly ash
    Michal A. Glinicki
    Marek Zielinski
    Materials and Structures, 2009, 42 : 993 - 1002
  • [29] Binder chemistry of sodium carbonate-activated CFBC fly ash
    Park, S. M.
    Seo, J. H.
    Lee, H. K.
    MATERIALS AND STRUCTURES, 2018, 51 (03)
  • [30] Hydration mechanism of desulfurized fly ash
    Luo, JP
    He, F
    Jian, SW
    Xie, JL
    Qiu, JR
    ENERGY AND ENVIRONMENT, VOLS 1 AND 2, 2003, : 1204 - 1207
12345