Thaumasite formation in stabilized coal combustion by-products

被引：8
作者：
Sahu, S [1 ]
Brown, SA [1 ]
Lee, RJ [1 ]
机构：
[1] RJ Lee Grp Inc, Monroeville, PA 15146 USA
来源：
CEMENT & CONCRETE COMPOSITES | 2002年 / 24卷 / 3-4期
关键词：
spray dryer ash; ettringite; thaumasite; gypsum; hannebachite; FGD;
D O I：
10.1016/S0958-9465(01)00091-9
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The by-products of the desulfurization process in a spray drier usually contain a mixture of hannebachite (CaSO3 . 1/2H(2)O), gypsum (CaSO4. 2H(2)O), and the finer fraction of the fly ash. This material was mixed with an additional fly ash and stabilized by adding about 3 wt% lime kiln dust (LKD). The stabilized product was used either as a structural fill or was left in the storage yard for several years. Samples extracted from these sites were analyzed using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The analytical results show the formation of thaumasite (Ca3Si(OH)(6)(CO3)(SO4) . 12H(2)O), ettringite (Ca6Al2(SO4)(3) (OH)(12) . 26H(2)O), and an intermediate phase with varying chemical composition of calcium, aluminum, silicon, and sulfur. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：385 / 391
页数：7
相关论文
共 50 条
  • [41] External sulfate attack in dam concretes with thaumasite formation
    Chinchon-Paya, S.
    Aguado, A.
    Nugteren, H. W.
    Chinchon, S.
    [J]. MATERIALES DE CONSTRUCCION, 2015, 65 (317) : e042
  • [42] Thaumasite formation in concrete and mortars containing fly ash
    Mulenga, DM
    Stark, J
    Nobst, P
    [J]. CEMENT & CONCRETE COMPOSITES, 2003, 25 (08) : 907 - 912
  • [43] Swiss tunnel structures: concrete damage by formation of thaumasite
    Romer, M
    Holzer, L
    Pfiffner, M
    [J]. CEMENT & CONCRETE COMPOSITES, 2003, 25 (08) : 1111 - 1117
  • [44] Prevention of thaumasite formation in concrete exposed to sulphate attack
    Bellmann, F.
    Stark, J.
    [J]. CEMENT AND CONCRETE RESEARCH, 2007, 37 (08) : 1215 - 1222
  • [45] Parameters affecting thaumasite formation in limestone cement mortar
    Kakali, G
    Tsivilis, S
    Skaropoulou, A
    Sharp, JH
    Swamy, RN
    [J]. CEMENT & CONCRETE COMPOSITES, 2003, 25 (08) : 977 - 981
  • [46] THE ROLE OF COAL COMBUSTION PRODUCTS IN MANAGING THE BIOAVAILABILITY OF NUTRIENTS AND HEAVY METALS IN SOILS
    Seshadri, B.
    Bolan, N. S.
    Naidu, R.
    Brodie, K.
    [J]. JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION, 2010, 10 (03) : 378 - 398
  • [47] Effect of tricalcium aluminate content on thaumasite formation of cement-limestone powder pastes
    [J]. Li, X. (lxggroup@163.com), 1600, Chinese Ceramic Society (41): : 1546 - 1550
  • [48] Analysis of thermodynamics of thaumasite formation in cement-based materials
    Xiao, Jia
    Meng, Qingye
    Ma, Baoguo
    Wang, Yingbin
    [J]. Jianzhu Cailiao Xuebao/Journal of Building Materials, 2015, 18 (02): : 263 - 268
  • [49] Effects of Wetting and Drying Cycles on Thaumasite Formation in Cement Mortars
    Abualgasem, J. M.
    Cripps, J. C.
    Lynsdale, C. J.
    [J]. JOURNAL OF MATERIALS IN CIVIL ENGINEERING, 2015, 27 (07)
  • [50] Thaumasite formation in sugary solutions: Effect of temperature and sucrose concentration
    Martinez-Ramirez, S.
    Blanco-Varela, M. T.
    Rapazote, J.
    [J]. CONSTRUCTION AND BUILDING MATERIALS, 2011, 25 (01) : 21 - 29
12345