硅酸盐学报

钙对F-型粉煤灰基地聚物性能的影响

作者：高婉琪杜海燕刘家臣王立龙

单位：先进陶瓷与加工技术教育部重点实验室天津大学材料科学与工程学院天津 300072

关键词：地聚物 F-型粉煤灰钙强度收缩腐蚀

分类号：TB 321

出版年,卷(期):页码：2015,43(3):334-339

DOI：DOI：10.7521/j.issn.0454-5648.2015.03.14

摘要：

在F-型粉煤灰原料中分别加入氧化钙、氢氧化钙和硫酸钙，制备F-型粉煤灰地聚物(FFAG)和加钙F-型粉煤灰地聚物(Ca-FFAG)，探索钙盐对地聚物机械性能、坯体收缩和抗腐蚀性的影响，通过扫描电子显微镜、能谱和X射线衍射研究不同钙盐对F-型粉煤灰地聚物性能的影响。结果表明：钙的加入提高了F-型粉煤灰地聚物早期强度和抗腐蚀性，同时减少了坯体的收缩，硫酸钙比氧化钙和氢氧化钙更有效。

In this paper, F-class fly ash (FFA) based geopolymer (FFAG) and FFAG with calcium compounds (Ca-FFAG) were synthesized. Three different calcium compounds, i.e., calcium oxide, calcium hydroxide and calcium sulfate, were added to the FFA. The samples were characterized by scanning electron microscopy, energy dispersive spectroscopy and X-ray diffraction, respectively. The effect of calcium compounds on the mechanical strength, the shrinkage of the pastes and the corrosion resistance of the F-class fly ash based geopolymers was investigated. The results indicate that the addition of calcium compound increases the early-age strength and corrosion resistance of the FFAG and decreases the shrinkage of the pastes, and the calcium sulfate is more effective than calcium oxide or calcium hydroxide for the improvement of FFAG property.

基金项目：

国家自然科学基金(51272171)资助项目。

作者简介：

参考文献：

[1] Phoo-ngernkham T, Chindaprasirt P, Sata V, et al. Properties of high calcium fly ash geopolymer pastes with Portland cement as an additive[J]. Int J Miner Met Mater, 2013, 20(2): 214–220.

[2] Yao Junzhang, Ya Chaowang, De Longxu, et al. Mechanical performance and hydration mechanism of geopolymer composite reinforced by resin [J]. Mater Sci Eng A, 2010, 527(24–25): 6574–6580.

[3] Jian Jiacheng, Liu Zheng, YANG hongbin, et al. Research on preparation and application status of geopolymers [J]. Multipurp Util Miner, 2014(3): 18–22.

[4] GUO Xiaolu, HU Wenpei, Dick W A. Compressive strength and microstructural characteristics of Class C fly ash geopolymer [J]. Cem Concr Compos, 2010, 32(2): 142–147.

[5] Antiohos S K, Tsimas S. A novel way to upgrade the coarse part of a high calcium fly ash for reuse into cement systems [J]. Waste Manag, 2007, 27(5): 675–683.

[6] LI Xueying, MA Xinwei, ZHANG Shoujie, et al. Mechanical properties and microstructure of class C fly ash-based geopolymer paste and mortar [J]. Materials, 2013, 6(4): 1485–1495.

[7] Geetha S, Ramamurthy K. Properties of geopolymerised low-calcium bottom ash aggregate cured at ambient temperature [J]. Cem Concr Compos, 2013, 43: 20–30.

[8] Temuujin J, van Riessen A. Effect of fly ash preliminary calcination on the properties of geopolymer [J]. Hazard Mater, 2009, 164(2–3): 634–639.

[9] Kamhangrittirong P, Suwanvitaya P, Witayakul W, et al. Factors influence on shrinkage of high calcium fly ash geopolymer paste [J]. Adv Mater Res, 2014, 610–613: 2276–2281.

[10] Zhang Yaojun, LI Sheng, Wang Yachao, et al. Microstructural and strength evolutions of geopolymer composite reinforced by resin exposed to elevated temperature [J]. J Non-cryst Solids, 2012, 358(3): 620–624.

[11] Vickers L. Rickard W D A, Van Riessen A. Strategies to control the high temperature shrinkage of fly ash based geopolymers [J]. Thermochim Acta, 2014, 580: 20–27.

[12] Bakharev T. Durability of geopolymer materials in sodium and magnesium sulfate solutions [J]. Cem Concr Res, 2005, 35(3): 1233–1246.

[13] Bonen D, MENASHI D. Magnesium sulfate attack on Portland cement paste–II. Chemical and mineralogical analyses [J]. Cem Concr Res, 1992, 22: 707–718.

服务与反馈：

【文章下载】【加入收藏】