Building Materials Research and Quality Control Institute, Housing & Building National Research Center (HBRC), Cairo, Egypt.
Civil Engineering Department, College of Engineering, Shaqra University, Al-Dawadmi, Riyadh, Saudi Arabia.
Environ Sci Pollut Res Int. 2022 Apr;29(19):28647-28660. doi: 10.1007/s11356-021-18365-7. Epub 2022 Jan 6.
Herein, the possibility of including recycled glass powder as a promising material in amalgamation with slag to produce new binder materials activated by sodium silicate solution capable to resist high temperatures was studied. Slag was partially replaced with glass powder (GP) at ratios in the range of 0-15%, by weight, with a step of 5%. The powders were activated by a constant concentration of sodium silicate solution. The percentage of water absorption and compressive strength were monitored at the ages of 3, 7 and 28 days. After 28 curing days, the specimens were subjected to severe temperatures in the range of 400-1000 °C with a step of 200 °C for 2 h and the residual compressive strength was monitored. The results were analysed by X-ray diffraction, thermogravimetric analysis, scanning electron microscopy and energy-dispersive X-ray spectra. The results revealed higher water absorption and lower compressive strength with the incorporation of GP. The incorporation of GP has a negative effect on the compressive strength of alkali-activated slag (AAS) pastes after exposure to 400 and 600 °C, whilst it has a positive effect after exposure to 800 and 1000 °C.
在此，研究了将回收玻璃粉作为一种有前途的材料与矿渣结合，生产新型粘结材料的可能性，这些粘结材料由硅酸钠溶液激活，能够抵抗高温。矿渣的重量比在 0-15%的范围内被玻璃粉（GP）部分取代，步长为 5%。粉末用恒定浓度的硅酸钠溶液激活。在 3、7 和 28 天龄期监测吸水率和抗压强度。在 28 天养护期后，将试样在 400-1000°C 的范围内以 200°C 的步长加热 2 小时，并监测残余抗压强度。结果通过 X 射线衍射、热重分析、扫描电子显微镜和能谱进行分析。结果表明，随着 GP 的掺入，吸水率增加，抗压强度降低。在 400 和 600°C 暴露后，GP 的掺入对碱激活矿渣（AAS）浆体的抗压强度有负面影响，但在 800 和 1000°C 暴露后则有积极影响。
