Micro-nanostructures of tobermorite hydrothermal-synthesized from fly ash and municipal solid waste incineration fly ash

被引：35

作者：

Guo, Xiaolu ^{[1
,2
]}

Song, Meng ^{[2
]}

机构：

[1] Tongji Univ, Minist Educ, Key Lab Adv Civil Engn Mat, Shanghai 201804, Peoples R China

[2] Tongji Univ, Sch Mat Sci & Engn, 4800 Caoan Rd, Shanghai 201804, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2018年 / 191卷

基金：

上海市自然科学基金;

关键词：

Tobermorite; Municipal solid waste incineration fly ash; Fly ash; Hydrothermal synthesis; Micro-nanostructures; C-S-H; AL; AL-27; NMR;

D O I：

10.1016/j.conbuildmat.2018.10.030

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Tobermorite has attracted extensive attention as the main hydrothermal product of autoclaved aerated concrete. The optimum hydrothermal synthesis conditions, micro-nanostructure and properties of the solid wastes-based tobermorite were analyzed using XRD, SEM, XRF, TG-DSC, FT-IR, MAS-NMR and nano-indentation. The results indicated that the optimum molar ratio of Ca/Si was 1.0, the mix mass ratio of MSWIFA/(FA + MSWIFA) was up to 62.6%; The incorporation of MSWIFA reduced the degree of polymerization and micromechanical properties of tobermorite, impeded the synthesis of silicon tetrahedron chain and the formation of fibrous tobermorite, and resulted in a low hardness and elastic modulus of tobermorite. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：431 / 439

页数：9

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