Lo Kang-Wei, Lin Ya-Wen, Cheng Ta-Wui, Lin Kae-Long, Lin Wei-Ting
Institute of Mineral Resources Engineering, National Taipei University of Technology, Taipei City 106, Taiwan.
Graduate Institute of Engineering Technology, National Taipei University of Technology, Taipei City 106, Taiwan.
Polymers (Basel). 2021 Nov 21;13(22):4029. doi: 10.3390/polym13224029.
This study used silicon carbide sludge (SCS) to prepare lightweight foaming geopolymer materials (FGPs) by the direct foaming method. Results showed that when the SCS replacement level was 10%, the bulk density of the lightweight FGPs with added foaming agent amounts of 0.5% and 2.0% was 0.59 and 0.49 g/cm, respectively; at a curing time of 28 days, the lightweight FGPs with amounts of added foaming agent of 0.5% and 2.0% had bulk densities that were 0.65 and 0.58 g/cm, respectively. When the SCS replacement level was 10%, and the amount of added foaming agent was 2.0%, the porosity ratio of the lightweight FGP increased from 31.88% to 40.03%. The mechanical strength of the lightweight FGPs with SCS replacement levels of 10% and 20% was 0.88 and 0.31 MPa, respectively. Additionally, when the amount of foaming agent increased to 2.0%, the thermal conductivity of the lightweight FGPs with SCS replacement levels of 10% and 20% were 0.370 and 0.456 W/m⋅K, respectively. When the curing time was 1 day, and the amount of added foaming agent was 0.5%, the reverse-side temperature of the lightweight FGPs with SCS replacement levels of 10% and 20% were 286 and 311 °C, respectively. The k value of the O reaction decreased from 2.94 × 10 to 1.76 × 10 because the reaction system was affected by the presence of SiC sludge, which was caused the reaction to consume O to form CO. The results have been proposed to explain that the manufactured lightweight FGPs had a low thermal conductivity (0.370-0.456 W/m⋅K). Therefore, recycling of silicon carbide sludge in lightweight foaming geopolymer materials has potential as fire resistance material for the construction industry.
本研究采用碳化硅污泥（SCS）通过直接发泡法制备轻质泡沫地质聚合物材料（FGPs）。结果表明，当SCS替代量为10%时，添加0.5%和2.0%发泡剂的轻质FGPs的堆积密度分别为0.59和0.49 g/cm；在养护28天时，添加0.5%和2.0%发泡剂的轻质FGPs的堆积密度分别为0.65和0.58 g/cm。当SCS替代量为10%且发泡剂添加量为2.0%时，轻质FGP的孔隙率从31.88%增加到40.03%。SCS替代量为10%和20%的轻质FGPs的机械强度分别为0.88和0.31 MPa。此外，当发泡剂用量增加到2.0%时，SCS替代量为10%和20%的轻质FGPs的热导率分别为0.370和0.456 W/m⋅K。当养护时间为1天且发泡剂添加量为0.5%时，SCS替代量为10%和20%的轻质FGPs的背面温度分别为286和311 °C。O反应的k值从2.94×10降至1.76×10，因为反应体系受到SiC污泥的影响，这导致反应消耗O形成CO。研究结果已被用来解释所制备的轻质FGPs具有低导热率（0.370 - 0.456 W/m⋅K）。因此，在轻质泡沫地质聚合物材料中回收碳化硅污泥作为建筑行业的耐火材料具有潜力。
