Investigate the mechanical behavior of alkali-activated slag mortar using sustainable waste sodium silicate-bonded sand as an alkali activator and carbon free aggregate

被引:4
作者
Tsai, Chia Jung [1 ]
机构
[1] Natl Pingtung Univ Sci & Technol, Dept Civil Engn, Pingtung 192, Taiwan
关键词
Waste sodium silicate -bonded sand; Alkali -activated slag mortar; Sodium silicate; Optimal ratio; FOUNDRY-SAND; CEMENTITIOUS MATERIAL; PARTIAL REPLACEMENT; PORE STRUCTURE; CONCRETE; STRENGTH; WFS;
D O I
10.1016/j.conbuildmat.2024.136448
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Various products generate different types of industrial by-products based on their production characteristics and procedures. Therefore, an accurate classification of these characteristics would contribute significantly to achieving the goals of resource recycling and environmental protection. This study focused on Waste AlkaliActivated Slag Mortar (W-AASM). In the past, inorganic aggregation technology was successfully adopted to replace conventional concrete binding materials and reduce cement usage. Besides utilizing inorganic aggregation technology, the study has introduced a novel industrial by-product known as Waste Sodium SilicateBonded Sand (WSSS). WSSS not only serves as a substitute for sodium silicate in alkali-activated agents but also acts as a complete replacement for fine aggregates in mortar. The experimental findings showed that, in addition to fulfilling the original strength requirements of concrete, it results in a significant reduction in cement consumption, minimizing the extraction of natural resources, and decreasing the overall cost of Alkali-activated concrete production. The study highlighted the advantage of WSSS and showed a new dimension of waste foundry sand application in the concrete industry. This method leads to the recycling of waste materials and their optimal use, and as a result, leads to a sustainable ecosystem. The results of this study can be applied to secondary structures in civil engineering and construction projects in the future, such as precast concrete products, concrete pavements, or roads.
引用
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页数:9
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