Hydrothermal synthesized and nano-modified wall materials from solid wastes

被引：7
|
作者：
Guo, Xiaolu [1 ,2 ]
Zhang, Tangjun [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 | 2019年 / 217卷
基金：
中国国家自然科学基金; 上海市自然科学基金;
关键词：
Municipal solid waste incineration fly ash; Fly ash; Tobermorite; Nano-modification; C-S-H; CEMENT; MICROSTRUCTURE; NANO-CACO3; HYDRATION; CONCRETE; ASH;
D O I：
10.1016/j.conbuildmat.2019.05.069
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Hydrothermal syntheses of nano-modified solid wastes-based wall materials are prepared, and their compressive strength, dry density and water absorption were investigated. Microscopic characteristics were analyzed by MIP, XRD, FT-IR and SEM. The nucleation of nano-CaCO3 promotes the formation of whisker-like and flaky tobermorite and their intercalation on the inner wall of the pores results in forming the connected crystals that greatly improve the compressive strength. Nano-Al2O3 makes tobermorite have a relatively large arrangement and promotes the formation of C-A-S-H filling the pores to improve the compactness of the system. Excessive nano-SiO2 is prone to agglomerate and unfavorable to the strength. (C) 2019 Published by Elsevier Ltd.
引用
收藏
页码：242 / 250
页数：9
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