材料科学
聚合物
化学工程
发泡剂
粉煤灰
抗压强度
高效减水剂
水泥
复合材料
多孔性
工程类
作者
Xiaogang Wang,Yangyang Wu,Xiangguo Li,Yuheng Li,Weiqin Tang,Jianming Dan,Chenglin Hong,Jinyu Wang,Xiaoqiang Yang
出处
期刊:Materials
[MDPI AG]
日期:2024-08-07
卷期号:17 (16): 3921-3921
摘要
Geopolymer foam concrete (GFC), an emerging thermal insulation material known for its environmentally friendly and low-carbon attributes, has gained prominence for its use in bolstering building energy efficiency. A critical challenge in GFC production is foam destabilization by the alkaline environment in which foam is supersaturated with salt. In this study, GFC was prepared by using triterpene saponin (TS), sodium dodecyl sulphate (SDS), and cetyltrimethylammonium bromide (CTAB) as blowing agents, with fly ash as the precursor and calcium carbide slag (CA) combined with Glauber’s salt (GS, Na2SO4 ≥ 99%) as the activator. The effect of GFC on mechanical properties was analyzed by examining its fluidity, pore structure, dry density, and compressive strength. The results show that TS has a stable liquid film capable of adapting to the adverse effects of salt supersaturation and alkaline environments. TS is highly stable in the GFC matrix, and so the corresponding pore size is small, and the connectivity is low in the hardened GFC. In addition, the hydration products of GFC exhibit different morphologies depending on the surfactant used. TS has better water retention due to hydrogen bonding, which facilitates the hydration process.
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