Stabilization of waste foundry sand with alkali-activated binder: Mechanical behavior, microstructure and leaching

被引：2
|
作者：
Pompermaier, Claudio Luiz [1 ]
Ferrazzo, Suellen Tonatto [2 ]
Levandoski, William Mateus Kubiaki [1 ]
Bruschi, Giovani Jordi [2 ]
Prietto, Pedro Domingos Marques [3 ]
Korf, Eduardo Pavan [1 ]
机构：
[1] Univ Fed Fronteira Sul, Grad Program Environm Sci & Technol, BR-99700970 Erechim, RS, Brazil
[2] Univ Fed Rio Grande do Sul, Grad Program Civil Engn, BR-90035190 Porto Alegre, Brazil
[3] Univ Passo Fundo, Grad Program Civil & Environm Engn, BR-99052900 Passo Fundo, RS, Brazil
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2024年 / 444卷
关键词：
Alkali-activation; Industrial waste; Compressive strength; Durability; Porosity/binder index; WETTING-DRYING CYCLES; FLY-ASH; CURING TIME; CEMENT; CONCRETE; PAVEMENT; ELEMENTS; LIME; PH;
D O I：
10.1016/j.conbuildmat.2024.137772
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
This study evaluates the stabilization of waste foundry sand (WFS) using an alkali-activated binder (AAB) produced from rice husk ash, hydrated eggshell lime, and sodium hydroxide. Mechanical properties, leaching behavior, and microstructure were assessed. The material's durability was investigated, and the impact of wetting-drying cycles on mechanical strength and metal leaching was analyzed. The stabilized WFS fulfilled the requirements for unconfined compressive strength (qu) and accumulated loss of mass (ALM), making it suitable for use in pavement layers. Wetting-drying cycles did not significantly affect strength, and leached metal concentrations remained below toxic limits.
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页数：15
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